Automatic arsenic measurement reaction device based on silver salt method

Abstract

The utility model relates to the technical field of hydrometallurgy, in particular to an automatic arsenic measurement reaction device based on a silver salt method, which comprises a test platform, an automatic sample injector, a measuring cell, a liquid inlet component, a first liquid discharge component and a second liquid discharge component, a plurality of mounting holes are formed in the upper side of the front part of the testing platform, and a measuring cell is mounted in each mounting hole; a plurality of reagent bottles are arranged on the automatic sample injector; the liquid inlet assembly comprises a first injection pump, the front side of the upper part of the test platform is provided with the first injection pump, and the plurality of reagent bottles are fixedly communicated with an inlet of the first injection pump; the device is simple in structure and convenient to use, automatic reagent adding and automatic reaction waste liquid discharging are achieved through the first injection pump, the second injection pump, the measuring pool, the switching valve, the peristaltic pump and other assemblies, the requirement for automatic sample feeding and discharging is met, the labor intensity of workers is reduced, the experiment efficiency is improved, and the experiment cost is reduced. And the device can be used for automatically measuring a plurality of channels at the same time, so that the sample analysis speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical technology, and in particular to an automatic arsenic determination reaction device based on the silver salt method. Background Technology

[0002] Currently, methods for testing arsenic content in samples include ICP, atomic fluorescence spectrometry, DDTC-Ag (silver salt method), and arsenic spot method. Among these, ICP has a high detection limit, making it difficult to detect trace amounts of arsenic in samples. Atomic fluorescence spectrometry has a low detection limit and high sensitivity, but the instruments are expensive, and maintenance and testing costs are high, making it unavailable to many grassroots testing units. Therefore, there is an urgent need for a method with a low detection limit, high sensitivity, and low testing cost to determine low levels of arsenic in samples. In traditional chemical engineering, DDTC-Ag and arsenic spot methods are common methods for arsenic determination. However, currently, there are no corresponding testing instruments for either of these methods, and the process generally involves manually setting up reaction devices and manually adding reagents. This method is relatively complex, prone to operational errors, and requires significant labor intensity and time. Therefore, there is a need to develop a simple, highly automated testing device to reduce labor intensity and operational errors. Utility Model Content

[0003] This invention provides an automatic arsenic determination reaction device based on the silver salt method, which overcomes the shortcomings of the prior art. It can effectively solve the problems of the existing manual silver salt method arsenic determination device and the fact that the manual device can only perform single sample analysis, resulting in slow testing speed and large measurement error. This invention device can realize the simultaneous measurement of multiple samples.

[0004] To solve the above problems, the present invention provides an automatic arsenic determination reaction device based on the silver salt method, comprising a test platform, an automatic sampler, a measuring cell, a liquid inlet assembly, and a liquid outlet assembly; the test platform has multiple mounting holes on its upper front side, and a measuring cell is installed in each mounting hole; the automatic sampler has multiple reagent bottles.

[0005] The liquid inlet assembly includes a first injection pump, a second injection pump, and absorption tubes. The first injection pump is installed on the front side of the upper part of the test platform. Multiple reagent bottles are fixedly connected to the inlet of the first injection pump, and the outlet of the first injection pump is fixedly connected to multiple measuring cells. The second injection pump is installed on the front side of the upper part of the test platform. There is a placement hole on the test platform corresponding to the position in front of each placement hole. An absorption tube is placed in each placement hole. Each absorption tube is fixedly connected to the measuring cell at the corresponding position. The inlets of multiple absorption tubes are fixedly connected to the second injection pump.

[0006] The drainage assembly includes a switching valve and a peristaltic pump. The peristaltic pump is fixedly installed on the front of the upper part of the test platform, and the outlets of multiple measuring cells are connected to the switching valves, with the outlets of the switching valves connected to the peristaltic pumps.

[0007] The test platform is equipped with drawers at the bottom, and each drawer below a measurement pool contains a magnetic stirrer.

[0008] The aforementioned test platform is equipped with a touch screen on the upper front side.

[0009] The aforementioned testing platform has double cabinet doors on the back.

[0010] The test platform is equipped with a constant temperature water bath at the bottom inside.

[0011] The number of the above-mentioned measuring pools is 6.

[0012] This invention has a simple structure and is easy to use. Through components such as a first injection pump, a second injection pump, a measuring cell, a switching valve, and a peristaltic pump, it realizes the automatic addition of reagents and the automatic discharge of reaction waste liquid, meeting the needs of automated sample loading and unloading, reducing the labor intensity of staff, and improving experimental efficiency. In addition, this device can perform automatic measurements in multiple channels simultaneously, which improves the sample analysis speed. Attached Figure Description

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a process diagram of the inlet and outlet liquid reaction of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the testing platform in this utility model.

[0017] In the diagram: 1-Test platform, 2-Automatic sampler, 3-Measuring cell, 4-Placement hole, 5-Reagent bottle, 6-First injection pump, 7-Second injection pump, 8-Absorption tube, 9-Placement hole, 10-Switching valve, 11-Peristaltic pump, 12-Drawer, 13-Touch display screen. Detailed Implementation

[0018] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0019] like Figure 1-3As shown, an automatic arsenic determination reaction device based on silver salt method includes a test platform 1, an automatic sampler 2, a measuring cell 3, a liquid inlet assembly, and a liquid outlet assembly; the test platform 1 has multiple mounting holes 4 on the upper front side, and a measuring cell 3 is installed in each mounting hole 4; the automatic sampler 2 has multiple reagent bottles 5.

[0020] The liquid inlet assembly includes a first injection pump 6, a second injection pump 7, and an absorption tube 8. The first injection pump 6 is installed on the front side of the upper part of the test platform 1. Multiple reagent bottles 5 are fixedly connected to the inlet of the first injection pump 6, and the outlet of the first injection pump 6 is fixedly connected to multiple measuring cells 3 respectively. The second injection pump 7 is installed on the front side of the upper part of the test platform 1. A placement hole 9 is provided on the test platform 1 corresponding to the position in front of each placement hole 4. An absorption tube 8 is placed in each placement hole 9. Each absorption tube 8 is fixedly connected to the measuring cell 3 at the corresponding position. The inlets of multiple absorption tubes 8 are fixedly connected to the second injection pump 7.

[0021] The drainage assembly includes a switching valve 10 and a peristaltic pump 11. The peristaltic pump 11 is fixedly installed on the front side of the upper part of the test platform 1. The outlets of multiple measuring pools 3 are all connected to the switching valve 10, and the outlets of the switching valve 10 are connected to the peristaltic pump 11.

[0022] The required number of measuring pools 3 is 6.

[0023] Among them, the measuring cell 3 and the absorption tube 8 are both made of high borosilicate glass; the first injection pump 6 and the second injection pump 7 are both high-precision injection pumps, and the valve port of the injection pump is made of sapphire, which is resistant to acids and alkalis. 2-12 channels can be customized as needed. They can be widely used in industrial production experiments of various acids, alkalis and salts in metallurgy, chemical industry, food and other industries for quality control and analysis.

[0024] Among them, the switching valve 10 is used to switch between different measuring cells 3 to discharge waste liquid; the peristaltic pump 11 is used to discharge waste liquid.

[0025] In the arsenic determination process of this invention, the testing platform 1 is activated, and reagents (arsenic standard solution / test solution, sulfuric acid, potassium iodide, stannous chloride, and water) are sequentially added to the measuring cell 3 via the autosampler 2 and the first injection pump 6. The second injection pump 7 adds DDTC-Ag solution to the absorption tube 8 via the autosampler 2. In the measuring cell 3, under the action of reducing agents (potassium iodide and stannous chloride), pentavalent arsenic in the sample is converted to trivalent arsenic. Simultaneously, in an acidic environment and under the action of zinc particles, trivalent arsenic reacts with nascent hydrogen to generate arsine gas. This gas is discharged into the absorption tube 8 containing the DDTC-Ag solution. In the absorption tube 8, the arsine gas reacts with DDTC-Ag to form a brownish-red substance with characteristic absorption at 530 nm. By measuring its absorbance, the arsenic content in the sample can be calculated. After the reaction is complete, the waste liquid in the measuring cell 3 is automatically discharged via the switching valve 10 and the peristaltic pump 11.

[0026] The above-mentioned method of setting up two injection pumps, with the second injection pump 7 adding the DDTC-Ag solution into the absorption tube 8, is because the DDTC-Ag solution is an organic solution used for subsequent absorbance measurement, and it is strictly required that it is free of water. The introduction of water will seriously affect the results. Therefore, the first injection pump 6 was not used, but a second injection pump 7 was added separately, thereby improving the accuracy of the experimental results.

[0027] In summary, this utility model has a simple structure and is easy to use. Through components such as the first injection pump 6, the second injection pump 7, the measuring cell 3, the switching valve 10, and the peristaltic pump 11, it realizes the automatic addition of reagents and the automatic discharge of reaction waste liquid, which meets the needs of automated sample loading and unloading, reduces the labor intensity of staff, and improves experimental efficiency. Moreover, this device can perform automatic measurement of multiple channels simultaneously, which improves the sample analysis speed.

[0028] like Figure 1 , 3 As shown, the test platform 1 has drawers 12 at its bottom, and each drawer 12 corresponding to the position below each measuring cell 3 is equipped with a magnetic stirrer. Thus, by placing a magnetic stir bar inside the measuring cell 3, the reaction process is accelerated through stirring.

[0029] like Figure 1 , 3 As shown, a touch screen 13 is provided on the upper front side of the test platform 1. The touch screen 13 is electrically connected to the first injection pump 6, the second injection pump 7, the switching valve 10, and the peristaltic pump 11. This allows for easy control of the start and stop of the first injection pump 6, the second injection pump 7, the switching valve 10, and the peristaltic pump 11 via the touch screen 13.

[0030] As needed, the back of test platform 1 is equipped with double cabinet doors. This facilitates the installation and maintenance of the devices inside the measurement platform.

[0031] As needed, a constant temperature water bath is installed on the inner bottom of test platform 1. This facilitates constant temperature water bath heating of the measuring cell, thereby improving the reaction rate.

Claims

1. An automatic arsenic determination reaction device based on the silver salt method, characterized in that, It includes a test platform, an autosampler, a measuring cell, a liquid inlet assembly, and a liquid outlet assembly; the test platform has multiple mounting holes on the upper front side, and a measuring cell is installed in each mounting hole; the autosampler has multiple reagent bottles; The liquid inlet assembly includes a first injection pump, a second injection pump, and absorption tubes. The first injection pump is installed on the front side of the upper part of the test platform. Multiple reagent bottles are fixedly connected to the inlet of the first injection pump, and the outlet of the first injection pump is fixedly connected to multiple measuring cells. The second injection pump is installed on the front side of the upper part of the test platform. There is a placement hole on the test platform corresponding to the position in front of each placement hole. An absorption tube is placed in each placement hole. Each absorption tube is fixedly connected to the measuring cell at the corresponding position. The inlets of multiple absorption tubes are fixedly connected to the second injection pump. The drainage assembly includes a switching valve and a peristaltic pump. The peristaltic pump is fixedly installed on the front of the upper part of the test platform, and the outlets of multiple measuring cells are connected to the switching valves, with the outlets of the switching valves connected to the peristaltic pumps.

2. The automatic arsenic determination reaction device based on the silver salt method according to claim 1, characterized in that, The test platform has drawers at the bottom, and each drawer below a measurement pool is equipped with a magnetic stirrer.

3. The automatic arsenic determination reaction device based on the silver salt method according to claim 1, characterized in that, The test platform is equipped with a touch screen on the front upper part, which is electrically connected to the first injection pump, the second injection pump, the switching valve, and the peristaltic pump.

4. The automatic arsenic determination reaction device based on the silver salt method according to claim 1, characterized in that, The testing platform has double cabinet doors on the back.

5. The automatic arsenic determination reaction device based on the silver salt method according to claim 1, characterized in that, The test platform is equipped with a constant temperature water bath at the bottom inside.

6. The automatic arsenic determination reaction device based on the silver salt method according to claim 1, characterized in that, There are 6 measuring cells.

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