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Direct-reading osmotic pressure tester and osmotic pressure testing method

A technology of osmotic pressure measuring instrument, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of limited use, high price, and expensive price, and achieve the effect of simple detection, low cost, and convenient measurement

Inactive Publication Date: 2010-10-13
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molarity osmotic pressure measuring instrument produced in the United States and Germany is equipped with a refrigeration system, and the osmotic pressure value of the solution is calculated by reducing the temperature of the sample liquid and measuring the freezing point of the sample liquid, and the price is high.
Due to the high price of imported osmometers, the use of such products in the processing of dipped foods is limited.

Method used

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  • Direct-reading osmotic pressure tester and osmotic pressure testing method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Experiment date March 1, 2010

[0025] Experimental conditions and methods Open the sample liquid valve 4, close the sample liquid 11, add a 1% salt solution into the sample liquid tank 10 through the sample liquid valve 4, and close the sample liquid valve 4 after filling the sample liquid tank; Drain valve 13, add pure water to the scale line in the pure water tank through the transparent scale tube, the scale line is consistent with the liquid level of the sample liquid tank, add pure water to the scale line after 30 minutes, and then add pure water to the scale line after 30 minutes, then from the pressure gauge or computer Read the osmolarity value. The same operation method can measure the osmotic pressure value of 5% and 10% salt solution. After measuring the value each time, open the sample liquid valve 11 and the water discharge valve 13 to drain the liquid, and rinse it with pure water to facilitate the determination of the next sample.

[0026] The osmotic ...

Embodiment 2

[0028] Experiment date March 2, 2010

[0029] Experimental conditions and methods Open the sample liquid valve 4, close the sample liquid valve 11, add the sucrose solution with a concentration of 1% into the sample liquid tank 10 through the sample liquid valve 4, and close the sample liquid valve 4 after filling the sample liquid tank; Close the water drain valve 13, add pure water to the pure water tank through the transparent scale tube 3 to the scale line, the scale line is consistent with the liquid level of the sample liquid tank, add pure water to the scale line after 35 minutes, and then add pure water to the scale line after 35 minutes, then from the pressure gauge Or read the osmotic pressure value on the computer. The same operation method can measure the osmotic pressure values ​​of 20% and 40% sucrose solutions. After measuring the value each time, open the sample liquid valve 11 and the water discharge valve 13 to drain the liquid, and rinse it with pure water ...

Embodiment 3

[0032] Experiment date March 3, 2010

[0033] Experimental conditions and methods Open the sample liquid valve 4, close the sample liquid 11, add the glucose solution with a concentration of 1% into the sample liquid tank 10 through the sample liquid valve 4, and close the sample liquid valve 4 after filling the sample liquid tank; Drain valve 13, add pure water to the scale line in the pure water tank through the transparent scale tube, the scale line is consistent with the liquid level of the sample liquid tank, add pure water to the scale line after 32 minutes, and then add pure water to the scale line after 32 minutes, then from the pressure gauge or computer Read the osmolarity value. The same operation method can measure the osmotic pressure values ​​of 20% and 40% glucose solutions. After measuring the value each time, open the sample liquid valve 11 and the water discharge valve 13 to drain the liquid, and rinse it with pure water to facilitate the determination of th...

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Abstract

The invention discloses a directly-reading osmotic pressure tester, which belongs to a testing instrument. The tester comprises a pure water tank and a closed sample liquid tank, wherein a graduated pipe for indicating water level is arranged on the pure water tank, a water discharge valve is arranged on the lower part of the pure water tank, a sample liquid filling pipe is arranged on the sampleliquid tank, a sample liquid discharging valve is arranged on the lower part of the sample liquid tank, and the sample liquid tank is communicated with the pure water tank through a connecting pipe in which an RO membrane is arranged; and a pressure sensor is arranged on the sample liquid tank and is connected with a data acquisition device which is connected with a processor. The testing method is as follows: based on the characteristic that pure water instead of solute molecules can pass through the RO membrane, pure water in the pure water tank passes through the reverse osmosis (RO) membrane to produce a reverse osmosis pressure in the closed sample liquid tank, and the pressure in the closed container is the reverse osmosis pressure of solution. The invention has the advantages of simple instrument structure, simple and convenient test, reliable data, extremely low energy consumption, low fault rate, no noise, low price and wide application in test of reverse osmosis pressures ofvarious kinds of solution.

Description

technical field [0001] The invention relates to a detection instrument, in particular to a direct-reading osmotic pressure measuring instrument and a measuring method for osmotic pressure. Background technique [0002] The dipping of traditional foods such as pickled mustard, milk cucumber, artichoke in sauce, pickled peppers, and candied fruit uses solutions such as salt and sugar. It has a long history. The dipped food can not only improve the flavor, but also prolong the shelf life of the food. A large class of dipped foods. However, the processing of such products often results in spoilage of the product or poor flavor of the product because the concentration of the selected solution is not suitable. If it is possible to measure the osmotic pressure of the solution and establish the appropriate osmotic pressure value when various products are impregnated, it is easy to control the impregnation process and prevent spoilage caused by microorganisms. Mole concentration os...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04G01L11/00
Inventor 李勇宋慧刘全德高兆建唐仕荣周卫东陈尚龙蔡侃
Owner XUZHOU UNIV OF TECH