Portable moisture measurement device and method

Abstract

The present invention discloses a portable water content determination device and method, comprising a liquid storage bottle (1), a determination bottle (2), a quantitative bottle (3), a waste liquid storage bottle (4), a first valve (51), a second valve (52), a third valve (53), and a fourth valve (54). The liquid storage bottle (1), the determination bottle (2), and the quantitative bottle (3) are made of elastic material, and only one micro-injector is required to complete the water content determination of a liquid sample. The present invention is convenient to carry, so the determination result is convenient, the waiting time is short, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to a device and a method for measuring moisture content using a Karl Fischer method, and belongs to the field of measuring trace moisture content. Background Art

[0002] The Karl Fischer method was proposed by Karl Fischer in 1935. It uses I2, SO2, pyridine, and anhydrous CH3OH (water content below 0.05%) to prepare reagents, and determines the water equivalent of the reagents. After the reagents react with the water in the sample, the water content in the sample is calculated by calculating the reagent consumption. The International Organization for Standardization has designated this method as the international standard for measuring trace moisture, and our country has also designated this method as the national standard for measuring trace moisture.

[0003] I2+SO2+H2O+3pyridine+CH3OH→2C5H5NHI(pyridine hydroiodide)+C5H5N·HSO4CH3(pyridine methyl sulfate)

[0004] From the reaction formula, we can see that 1 mol of water requires 1 mol of iodine, 1 mol of sulfur dioxide, 3 mol of pyridine and 1 mol of methanol to produce 2 mol of pyridine hydroiodide and 1 mol of pyridine methylsulfate. This is theoretical data, but in reality, the dosage of SO2, pyridine and CH3OH is excessive. After the reaction is completed, the excess free iodine turns reddish brown, which can be determined as reaching the end point.

[0005] The common Karl Fischer volumetric moisture meter consists of a control system, electrodes, a titration bottle, a sample addition system, and a liquid storage bottle. It is a complete set of equipment and needs to be used in a laboratory environment. Generally, samples are taken on site and sent to the laboratory for analysis, which takes a long time to wait and is inefficient. Summary of the invention

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a portable moisture measuring device and method that is easy to carry.

[0007] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is:

[0008] A portable moisture measuring device comprises a liquid storage bottle, a measuring bottle, a quantitative bottle, a waste liquid storage bottle, a first valve, a second valve, a third valve, and a fourth valve, wherein the liquid storage bottle, the measuring bottle, and the quantitative bottle are made of elastic materials, wherein:

[0009] The liquid storage bottle is provided with a first liquid storage opening and a second liquid storage opening, and the first liquid storage opening and the second liquid storage opening are both opened at the upper end of the liquid storage bottle.

[0010] The measuring bottle is provided with an injection port, a first measuring opening, a second measuring opening and a third measuring opening, wherein the injection port, the first measuring opening and the second measuring opening are all opened at the upper end of the measuring bottle, and the third measuring opening is located below the second measuring opening.

[0011] The quantitative bottle is provided with a first quantitative opening and a second quantitative opening.

[0012] The waste liquid storage bottle is provided with a vent hole and a first waste liquid opening, and the vent hole is provided with a ventilating and liquid isolating valve.

[0013] The first valve is connected to the second liquid storage opening at one end and to the second quantitative opening at the other end. The second valve is connected to the first waste liquid opening at one end and to the second measurement opening at the other end. The third valve is connected to the third measurement opening at one end and to the first quantitative opening at the other end. The fourth valve is connected to the first liquid storage opening at one end and to the first measurement opening at the other end.

[0014] Preferably, the waste liquid storage bottle is provided with a waste liquid discharge outlet, and a waste liquid discharge valve is arranged on the waste liquid discharge outlet.

[0015] Preferably, a liquid storage inlet is provided on the liquid storage bottle, and the liquid storage inlet is provided at the upper end of the liquid storage bottle.

[0016] Preferably, the third measuring opening is opened in the middle of the measuring bottle.

[0017] Preferably, the first valve, the second valve, the third valve and the fourth valve are slide valves, gate valves, stop valves, ball valves or butterfly valves.

[0018] A portable moisture measurement method, using the portable moisture measurement device, comprises the following steps:

[0019] Step 1: Fill the quantitative bottle with liquid

[0020] Step 11, tilt the portable moisture measuring device so that the quantitative bottle is located below the measuring bottle. Open the first valve, the second valve, and the third valve.

[0021] Step 12, press the liquid storage bottle, the test solution in the liquid storage bottle flows out from the second liquid storage opening under the action of pressure, flows into the second quantitative opening through the first valve, and then enters the quantitative bottle. The air in the quantitative bottle flows out from the first quantitative opening under the action of the pressure of the inflowing test solution, flows into the third measurement opening through the third valve, and then enters the measurement bottle. The air in the measurement bottle flows out from the second measurement opening under the action of the pressure of the inflowing air, flows into the first waste liquid opening through the second valve, and then enters the waste liquid storage bottle. The air in the waste liquid storage bottle flows out from the air vent under the action of the pressure of the inflowing air, and flows to the outside through the air permeable liquid isolation valve.

[0022] Step 13, repeat step 12 until the quantitative bottle is completely filled, and after the quantitative bottle is completely filled, close the first valve, the second valve, and the third valve.

[0023] Step 2: Remove excess test solution

[0024] Step 21, if the test solution in the quantitative bottle overflows into the measuring bottle, open the second valve and the fourth valve.

[0025] Step 22, tilt the portable moisture measuring device so that the second measuring opening is located at the lowest end of the measuring bottle.

[0026] Step 23, press the waste liquid storage bottle, the air in the waste liquid storage bottle flows out from the first liquid storage opening under the action of pressure, flows into the first measurement opening through the fourth valve, and then enters the measurement bottle. The test solution in the measurement bottle flows out from the second measurement opening under the action of the pressure of the inflowing air, flows into the first waste liquid opening through the second valve, and then enters the waste liquid storage bottle. The air in the waste liquid storage bottle flows out from the vent under the action of the pressure of the inflowing test solution, and flows to the outside through the ventilating liquid isolation valve.

[0027] Step 24, repeat step 23 until all the test solution in the measuring bottle is discharged into the waste liquid storage bottle, and then close the second valve and the fourth valve.

[0028] Step 3: Return gas to the storage bottle

[0029] Step 31, place the portable moisture measuring device upright so that the liquid storage bottle is upright, and open the second valve and the fourth valve.

[0030] Step 32, the liquid storage bottle automatically rebounds to its original state due to the elasticity of the bottle body, generating suction, and the outside air flows into the ventilation port through the breathable liquid isolation valve, and then enters the waste liquid storage bottle. Under the action of suction, the air in the waste liquid storage bottle flows out from the first waste liquid opening, flows into the second measurement opening through the second valve, and then enters the measurement bottle. Under the action of suction, the air in the measurement bottle flows out from the first measurement opening, flows into the first liquid storage opening through the fourth valve, and then enters the liquid storage bottle until the liquid storage bottle returns to its original state. Then close the second valve and the fourth valve.

[0031] Step 4: Add the test solution into the test bottle

[0032] Step 41, place the portable moisture measuring device upright so that the measuring bottle is upright, and open the first valve, the second valve, and the third valve.

[0033] Step 42, press the liquid storage bottle, the air in the liquid storage bottle flows out from the second liquid storage opening under the action of pressure, flows into the second quantitative opening through the first valve, and then enters the quantitative bottle. The test solution in the quantitative bottle flows out from the first quantitative opening under the action of the pressure of the inflowing air, flows into the third measurement opening through the third valve, and then enters the measurement bottle. The air in the measurement bottle flows out from the second measurement opening under the action of the pressure of the inflowing test solution, flows into the first waste liquid opening through the second valve, and then enters the waste liquid storage bottle. The air in the waste liquid storage bottle flows out from the air vent under the action of the pressure of the inflowing air, and flows to the outside through the air vent valve.

[0034] Step 43, repeat step 42 until the test solution in the quantitative bottle is completely discharged, and then close the first valve, the second valve, and the third valve.

[0035] Step 5: Add sample for measurement

[0036] After quantitatively drawing the sample with a syringe, pierce the top of the measuring bottle and push the sample into the measuring bottle, shake the measuring bottle, wait for the reaction to be complete, observe the color, and determine the moisture threshold.

[0037] Step 6: Drain the waste liquid from the test bottle

[0038] Step 61, tilt the portable moisture measuring device so that the second measuring opening is located at the lowest end of the measuring bottle.

[0039] Step 62, press the liquid storage bottle, the air in the liquid storage bottle flows out from the first liquid storage opening under the action of pressure, flows into the first measurement opening through the fourth valve, and then enters the measurement bottle. The test solution in the measurement bottle flows out from the second measurement opening under the action of the pressure of the inflowing air, flows into the first waste liquid opening through the second valve, and then enters the waste liquid storage bottle. The air in the waste liquid storage bottle flows out from the vent under the action of the pressure of the inflowing test solution, and flows to the outside through the venting liquid isolation valve.

[0040] Step 63, repeat step 62 until all the liquid in the measuring bottle is discharged into the waste liquid storage bottle, and then close the second valve and the fourth valve.

[0041] Preferably: a method for determining the critical point of the determination bottle is included, and the method for determining the critical point of the determination bottle is as follows:

[0042] After completing steps 1, 2, and 3, use a water standard solution of known concentration to pierce the injection port and push it in gradually. Shake the measuring bottle with each push until it reacts completely. Until the liquid in the measuring bottle changes from brown to yellow. Record the volume of the injected solution.

[0043] Critical value calculation formula: △=C*V

[0044] Where: △ represents the critical point of the determination bottle, C represents the water content of the water standard solution used, and V represents the volume of the water standard solution injected into the determination bottle.

[0045] Preferably: including a sampling measurement method, the sampling measurement method is as follows:

[0046] Take a certain amount of sample, insert it into the injection port, and shake the measuring bottle to react. If the liquid in the measuring bottle is brown, its water content is less than △ / V1. If the liquid in the measuring bottle is light yellow, its water content is greater than or equal to △ / V1, where V1 represents the volume of the sample injected into the measuring bottle.

[0047] Preferably, after step 6 is completed, the liquid storage bottle needs to be re-aired using the method of step 3 so that the liquid storage bottle returns to its original state.

[0048] Preferably: it also includes a method for discharging waste liquid, which is as follows: place the portable moisture measuring device at an angle so that the waste liquid discharge outlet is located at the lowest end of the waste liquid storage bottle, open the waste liquid discharge valve, and the waste liquid in the waste liquid storage bottle automatically flows out under the action of gravity.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The liquid storage bottle, measuring bottle, quantitative bottle, waste liquid storage bottle, first valve, second valve, third valve and fourth valve of the present invention are made of elastic material and are easy to carry. Only a micro-injector is needed to complete the water content determination of liquid samples. The determination can be carried out after on-site sampling without sending the samples to a laboratory for testing. Therefore, the waiting time for obtaining the test results is short and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of the present invention.

[0052] Figure 2 It is a structural diagram of the slide valve.

[0053] Figure 3 Schematic diagram of filling the quantitative bottle with storage liquid.

[0054] Figure 4 Schematic diagram for eliminating excess test solution.

[0055] Figure 5 Schematic diagram of gas return from liquid storage bottle.

[0056] Figure 6 Schematic diagram of adding test solution into the measuring bottle.

[0057] Figure 7 Schematic diagram of sample addition measurement.

[0058] Figure 8 Schematic diagram of discharging waste liquid from the measurement bottle.

[0059] In the figure, the solid arrows represent the liquid flow direction, and the hollow arrows represent the gas flow direction. DETAILED DESCRIPTION

[0060] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0061] A portable moisture measuring device, such as Figure 1 As shown, it includes a liquid storage bottle 1, a measuring bottle 2, a quantitative bottle 3, a waste liquid storage bottle 4, a first valve 51, a second valve 52, a third valve 53, and a fourth valve 54. The first valve 51, the second valve 52, the third valve 53, and the fourth valve 54 are slide valves, gate valves, stop valves, ball valves, or butterfly valves. Figure 2 The liquid storage bottle 1, the measuring bottle 2 and the quantitative bottle 3 are made of elastic materials, wherein:

[0062] The liquid storage bottle 1 is provided with a liquid storage inlet 11 , a first liquid storage opening 12 , and a second liquid storage opening 13 . The liquid storage inlet 11 , the first liquid storage opening 12 , and the second liquid storage opening 13 are all located at the upper end of the liquid storage bottle 1 .

[0063] The measuring bottle 2 is provided with an injection port 21, a first measuring opening 22, a second measuring opening 23, and a third measuring opening 24, wherein the injection port 21, the first measuring opening 22, and the second measuring opening 23 are all opened at the upper end of the measuring bottle 2, and the third measuring opening 24 is located below the second measuring opening 23. Specifically, the third measuring opening 24 is opened in the middle of the measuring bottle 2.

[0064] The quantitative bottle 3 is provided with a first quantitative opening 31 and a second quantitative opening 32 .

[0065] The waste liquid storage bottle 4 is provided with a vent 41 , a waste liquid outlet 42 and a first waste liquid opening 43 . The vent 41 is provided with a vent liquid isolation valve 411 , and the waste liquid outlet 42 is provided with a waste liquid dispatching valve 421 .

[0066] The first valve 51 is connected to the second liquid storage opening 13 at one end, and to the second quantitative opening 32 at the other end. The second valve 52 is connected to the first waste liquid opening 43 at one end, and to the second measurement opening 23 at the other end. The third valve 53 is connected to the third measurement opening 24 at one end, and to the first quantitative opening 31 at the other end. The fourth valve 54 is connected to the first liquid storage opening 12 at one end, and to the first measurement opening 22 at the other end.

[0067] A portable moisture measurement method, using the portable moisture measurement device, comprises the following steps:

[0068] Step 1, such as Figure 3 As shown, fill the quantitative bottle 3 with liquid storage

[0069] Step 11, tilt the portable moisture measuring device so that the quantitative bottle 3 is located below the measuring bottle 2. Open the first valve 51, the second valve 52, and the third valve 53.

[0070] Step 12, press the liquid storage bottle 1, the test liquid in the liquid storage bottle 1 flows out from the second liquid storage opening 13 under the action of pressure, flows into the second quantitative opening 32 through the first valve 51, and then enters the quantitative bottle 3. The air in the quantitative bottle 3 flows out from the first quantitative opening 31 under the action of the pressure of the inflowing test liquid, flows into the third measurement opening 24 through the third valve 53, and then enters the measurement bottle 2. The air in the measurement bottle 2 flows out from the second measurement opening 23 under the action of the pressure of the inflowing air, flows into the first waste liquid opening 43 through the second valve 52, and then enters the waste liquid storage bottle 4. The air in the waste liquid storage bottle 4 flows out from the air vent 41 under the action of the pressure of the inflowing air, and flows to the outside through the air vent valve 411.

[0071] Step 13, repeat step 12 until the quantitative bottle 3 is completely filled, and after the quantitative bottle 3 is completely filled, close the first valve 51, the second valve 52, and the third valve 53.

[0072] Step 2, such as Figure 4 As shown, remove excess test solution

[0073] Step 21 , if the test solution in the quantitative bottle 3 overflows into the measuring bottle 2 , the second valve 52 and the fourth valve 54 are opened.

[0074] Step 22 , tilt the portable moisture measuring device so that the second measuring opening 23 is located at the lowest end of the measuring bottle 2 .

[0075] Step 23, press the waste liquid storage bottle 4, the air in the waste liquid storage bottle 4 flows out from the first liquid storage opening 12 under the action of pressure, flows into the first measurement opening 22 through the fourth valve 54, and then enters the measurement bottle 2. The test solution in the measurement bottle 2 flows out from the second measurement opening 23 under the action of the pressure of the inflowing air, flows into the first waste liquid opening 43 through the second valve 52, and then enters the waste liquid storage bottle 4. The air in the waste liquid storage bottle 4 flows out from the air vent 41 under the action of the pressure of the inflowing test solution, and flows to the outside through the air vent valve 411.

[0076] Step 24, repeat step 23 until all the test solution in the measuring bottle 2 is discharged into the waste liquid storage bottle 4, and then close the second valve 52 and the fourth valve 54.

[0077] Step 3, such as Figure 5 As shown, the liquid storage bottle 1 returns to the gas

[0078] Step 31, put the portable moisture measuring device upright so that the liquid storage bottle 1 is upright, and open the second valve 52 and the fourth valve 54.

[0079] Step 32, the liquid storage bottle 1 automatically rebounds to its original state due to the elasticity of the bottle body, generating suction, and the outside air flows into the air vent 41 through the air-permeable liquid isolation valve 411, and then enters the waste liquid storage bottle 4. Under the action of suction, the air in the waste liquid storage bottle 4 flows out from the first waste liquid opening 43, flows into the second measurement opening 23 through the second valve 52, and then enters the measurement bottle 2. Under the action of suction, the air in the measurement bottle 2 flows out from the first measurement opening 22, flows into the first liquid storage opening 12 through the fourth valve 54, and then enters the liquid storage bottle 1 until the liquid storage bottle 1 returns to its original state. Then close the second valve 52 and the fourth valve 54.

[0080] Step 4, such as Figure 6 As shown, the test solution is added to the measuring bottle 2

[0081] Step 41 , put the portable moisture measuring device upright so that the measuring bottle 2 is upright, and open the first valve 51 , the second valve 52 , and the third valve 53 .

[0082] Step 42, press the liquid storage bottle 1, the air in the liquid storage bottle 1 flows out from the second liquid storage opening 13 under the action of pressure, flows into the second quantitative opening 32 through the first valve 51, and then enters the quantitative bottle 3. The test solution in the quantitative bottle 3 flows out from the first quantitative opening 31 under the action of the pressure of the inflowing air, flows into the third measurement opening 24 through the third valve 53, and then enters the measurement bottle 2. The air in the measurement bottle 2 flows out from the second measurement opening 23 under the action of the pressure of the inflowing test solution, flows into the first waste liquid opening 43 through the second valve 52, and then enters the waste liquid storage bottle 4. The air in the waste liquid storage bottle 4 flows out from the air vent 41 under the action of the pressure of the inflowing air, and flows to the outside through the air vent valve 411.

[0083] Step 43, repeat step 42 until the test solution in the quantitative bottle 3 is completely discharged, and then close the first valve 51, the second valve 52, and the third valve 53.

[0084] Step 5, such as Figure 7 As shown, add sample to measure

[0085] After quantitatively drawing the sample with a syringe, pierce the top of the measuring bottle 2 and push the sample into the measuring bottle 2, and shake the measuring bottle 2. After the reaction is complete, observe the color and determine the moisture threshold.

[0086] Step 6, such as Figure 8 As shown, drain the waste liquid in the measuring bottle.

[0087] Step 61 , tilt the portable moisture measuring device so that the second measuring opening 23 is located at the lowest end of the measuring bottle 2 .

[0088] Step 62, press the liquid storage bottle 1, the air in the liquid storage bottle 1 flows out from the first liquid storage opening 12 under the action of pressure, flows into the first measurement opening 22 through the fourth valve 54, and then enters the measurement bottle 2. The test solution in the measurement bottle 2 flows out from the second measurement opening 23 under the action of the pressure of the inflowing air, flows into the first waste liquid opening 43 through the second valve 52, and then enters the waste liquid storage bottle 4. The air in the waste liquid storage bottle 4 flows out from the air vent 41 under the action of the pressure of the inflowing test solution, and flows to the outside through the air vent valve 411.

[0089] Step 63, repeat step 62 until all the liquid in the measuring bottle 2 is discharged into the waste liquid storage bottle 4, and then close the second valve 52 and the fourth valve 54.

[0090] Step 7, secondary return of gas from storage bottle 1

[0091] Repeat step 3 to return air to the liquid storage bottle 1 so that the liquid storage bottle 1 returns to its original state.

[0092] Step 8: Discharge the waste liquid

[0093] The portable moisture measuring device is placed at an angle so that the waste liquid outlet 42 is located at the lowest end of the waste liquid storage bottle 4, and the waste liquid discharging valve 421 is opened, and the waste liquid in the waste liquid storage bottle 4 automatically flows out under the action of gravity.

[0094] The method for determining the critical point of the measuring bottle is as follows:

[0095] After completing steps 1, 2, and 3, use a water standard solution of known concentration to pierce the injection port and push it in step by step. Shake the measuring bottle 2 with each push until it reacts completely. Until the liquid in the measuring bottle 2 changes from brown to yellow. Record the volume of the injected solution.

[0096] Critical value calculation formula: △=C*V

[0097] Where: △ represents the critical point of the determination bottle, C represents the water content of the water standard solution used, and V represents the volume of the water standard solution injected into the determination bottle.

[0098] The sampling and measurement method is as follows:

[0099] Draw a certain amount of sample, insert it into the injection port, and shake the measuring bottle 2 for reaction. If the liquid in the measuring bottle 2 is brown, its water content is less than △ / V1. If the liquid in the measuring bottle 2 is light yellow, its water content is greater than or equal to △ / V1, where V1 represents the volume of the sample injected into the measuring bottle.

[0100] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A portable moisture determination method, using a portable moisture determination device, characterized in that: The portable moisture measuring device comprises a liquid storage bottle (1), a measuring bottle (2), a quantitative bottle (3), a waste liquid storage bottle (4), a first valve (51), a second valve (52), a third valve (53), and a fourth valve (54), wherein the liquid storage bottle (1), the measuring bottle (2), and the quantitative bottle (3) are made of elastic material, wherein: The liquid storage bottle (1) is provided with a first liquid storage opening (12) and a second liquid storage opening (13), and the first liquid storage opening (12) and the second liquid storage opening (13) are both located at the upper end of the liquid storage bottle (1); The measuring bottle (2) is provided with an injection port (21), a first measuring opening (22), a second measuring opening (23), and a third measuring opening (24), wherein the injection port (21), the first measuring opening (22), and the second measuring opening (23) are all provided at the upper end of the measuring bottle (2), and the third measuring opening (24) is located below the second measuring opening (23); The quantitative bottle (3) is provided with a first quantitative opening (31) and a second quantitative opening (32); The waste liquid storage bottle (4) is provided with a vent (41) and a first waste liquid opening (43), and the vent (41) is provided with a vent and liquid isolation valve (411); One end of the first valve (51) is connected to the second liquid storage opening (13), and the other end is connected to the second quantitative opening (32); one end of the second valve (52) is connected to the first waste liquid opening (43), and the other end is connected to the second measurement opening (23); one end of the third valve (53) is connected to the third measurement opening (24), and the other end is connected to the first quantitative opening (31); one end of the fourth valve (54) is connected to the first liquid storage opening (12), and the other end is connected to the first measurement opening (22); The following steps are involved: Step 1: Fill the quantitative bottle (3) with the storage solution. Step 11, tilt the portable moisture measuring device so that the quantitative bottle (3) is located below the measuring bottle (2); open the first valve (51), the second valve (52), and the third valve (53); Step 12, pressing the liquid storage bottle (1), the test liquid in the liquid storage bottle (1) flows out from the second liquid storage opening (13) under the action of pressure, flows into the second quantitative opening (32) through the first valve (51), and then enters the quantitative bottle (3); the air in the quantitative bottle (3) flows out from the first quantitative opening (31) under the action of the pressure of the inflowing test liquid, flows into the third measurement opening (24) through the third valve (53), and then enters the measurement bottle (2); the air in the measurement bottle (2) flows out from the second measurement opening (23) under the action of the pressure of the inflowing air, flows into the first waste liquid opening (43) through the second valve (52), and then enters the waste liquid storage bottle (4); the air in the waste liquid storage bottle (4) flows out from the air permeable opening (41) under the action of the pressure of the inflowing air, and flows to the outside through the air permeable liquid isolation valve (411); Step 13, repeating step 12 until the quantitative bottle (3) is completely filled, and after the quantitative bottle (3) is completely filled, closing the first valve (51), the second valve (52), and the third valve (53); Step 2: Remove excess test solution Step 21, if the test solution in the quantitative bottle (3) overflows into the measuring bottle (2), the second valve (52) and the fourth valve (54) are opened; Step 22, tilting the portable moisture measuring device so that the second measuring opening (23) is located at the lowest end of the measuring bottle (2); Step 23, pressing the waste liquid storage bottle (4), the air in the waste liquid storage bottle (4) flows out from the first liquid storage opening (12) under the action of pressure, flows into the first measurement opening (22) through the fourth valve (54), and then enters the measurement bottle (2); the test solution in the measurement bottle (2) flows out from the second measurement opening (23) under the action of the pressure of the flowing air, flows into the first waste liquid opening (43) through the second valve (52), and then enters the waste liquid storage bottle (4); the air in the waste liquid storage bottle (4) flows out from the air permeable opening (41) under the action of the pressure of the flowing test solution, and flows to the outside through the air permeable liquid isolation valve (411); Step 24, repeating step 23 until all the test solution in the measuring bottle (2) is discharged into the waste liquid storage bottle (4), and then closing the second valve (52) and the fourth valve (54); Step 3: Return air to the liquid storage bottle (1) Step 31, place the portable moisture measuring device upright so that the liquid storage bottle (1) is upright, and open the second valve (52) and the fourth valve (54); Step 32, the liquid storage bottle (1) automatically rebounds to its original shape due to the elasticity of the bottle body, generating suction, and the outside air flows into the air vent (41) through the air-permeable liquid isolation valve (411), and then enters the waste liquid storage bottle (4); under the action of the suction, the air in the waste liquid storage bottle (4) flows out from the first waste liquid opening (43), flows into the second measurement opening (23) through the second valve (52), and then enters the measurement bottle (2); under the action of the suction, the air in the measurement bottle (2) flows out from the first measurement opening (22), flows into the first liquid storage opening (12) through the fourth valve (54), and then enters the liquid storage bottle (1), until the liquid storage bottle (1) returns to its original shape; then the second valve (52) and the fourth valve (54) are closed; Step 4: Add the test solution into the measuring bottle (2). Step 41, place the portable moisture measuring device upright so that the measuring bottle (2) is upright, and open the first valve (51), the second valve (52), and the third valve (53); Step 42, pressing the liquid storage bottle (1), the air in the liquid storage bottle (1) flows out from the second liquid storage opening (13) under the action of pressure, flows into the second quantitative opening (32) through the first valve (51), and then enters the quantitative bottle (3); the test solution in the quantitative bottle (3) flows out from the first quantitative opening (31) under the action of the pressure of the inflowing air, flows into the third measurement opening (24) through the third valve (53), and then enters the measurement bottle (2); the air in the measurement bottle (2) flows out from the second measurement opening (23) under the action of the pressure of the inflowing test solution, flows into the first waste liquid opening (43) through the second valve (52), and then enters the waste liquid storage bottle (4); the air in the waste liquid storage bottle (4) flows out from the air permeable opening (41) under the action of the pressure of the inflowing air, and flows to the outside through the air permeable liquid isolation valve (411); Step 43, repeating step 42 until the test solution in the quantitative bottle (3) is completely discharged, and then closing the first valve (51), the second valve (52), and the third valve (53); Step 5: Add sample for measurement After quantitatively drawing the sample with a syringe, pierce the top of the measuring bottle (2) and push the sample into the measuring bottle (2), and shake the measuring bottle (2); wait for the reaction to be complete, observe the color, and determine the moisture threshold; Step 6: Drain the waste liquid from the test bottle Step 61, tilting the portable moisture measuring device so that the second measuring opening (23) is located at the lowest end of the measuring bottle (2); Step 62, pressing the liquid storage bottle (1), the air in the liquid storage bottle (1) flows out from the first liquid storage opening (12) under the action of pressure, flows into the first measuring opening (22) through the fourth valve (54), and then enters the measuring bottle (2); the test liquid in the measuring bottle (2) flows out from the second measuring opening (23) under the action of the pressure of the flowing air, flows into the first waste liquid opening (43) through the second valve (52), and then enters the waste liquid storage bottle (4); the air in the waste liquid storage bottle (4) flows out from the air permeable opening (41) under the action of the pressure of the flowing test liquid, and flows to the outside through the air permeable liquid isolation valve (411); Step 63, repeat step 62 until all the liquid in the measuring bottle (2) is discharged into the waste liquid storage bottle (4), and then close the second valve (52) and the fourth valve (54).

2. The portable moisture determination method according to claim 1, characterized in that: The waste liquid storage bottle (4) is provided with a waste liquid discharge outlet (42), and the waste liquid discharge outlet (42) is provided with a waste liquid dispatch valve (421).

3. The portable moisture determination method according to claim 2, characterized in that: The liquid storage bottle (1) is provided with a liquid storage inlet (11), and the liquid storage inlet (11) is located at the upper end of the liquid storage bottle (1).

4. The portable moisture determination method according to claim 3, characterized in that: The third measuring opening (24) is opened in the middle of the measuring bottle (2).

5. The portable moisture determination method according to claim 3, characterized in that: The first valve (51), the second valve (52), the third valve (53), and the fourth valve (54) are slide valves, gate valves, stop valves, ball valves, or butterfly valves.

6. The portable moisture determination method according to claim 5, characterized in that: The invention comprises a method for determining the critical point of the determination bottle, wherein the method for determining the critical point of the determination bottle is as follows: After completing steps 1, 2, and 3, use a water standard solution of known concentration to pierce the injection port and push it in step by step; shake the measuring bottle (2) for each push to allow it to react completely; until the liquid in the measuring bottle (2) changes from brown to yellow; record the volume of the injected solution; Critical value calculation formula: △=C*V Where: △ represents the critical point of the determination bottle, C represents the water content of the water standard solution used, and V represents the volume of the water standard solution injected into the determination bottle.

7. The portable moisture determination method according to claim 6, characterized in that: The method comprises a sampling measurement method, wherein the sampling measurement method is as follows: A certain amount of sample is drawn into the injection port, and the measuring bottle (2) is shaken to react; if the color of the liquid in the measuring bottle (2) is brown, then its water content is less than △ / V1; if the color of the liquid in the measuring bottle (2) is light yellow, then its water content is greater than or equal to △ / V1, where V1 represents the volume of the sample injected into the measuring bottle.

8. The portable moisture determination method according to claim 7, characterized in that: After step 6 is completed, the liquid storage bottle (1) needs to be ventilated using the method of step 3 so that the liquid storage bottle (1) returns to its original state.

9. The portable moisture determination method according to claim 8, characterized in that: The invention also includes a method for discharging waste liquid, which is as follows: the portable moisture measuring device is placed at an angle so that the waste liquid discharge port (42) is located at the lowest end of the waste liquid storage bottle (4), and the waste liquid discharging valve (421) is opened, so that the waste liquid in the waste liquid storage bottle (4) automatically flows out under the action of gravity.

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