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A detection reagent for detecting sulfate contents in a water body

A sulfate and detection agent technology, applied in the field of environmental monitoring, can solve problems such as undiscovered sulfate, and achieve the effect of low price and easy portability

Inactive Publication Date: 2013-09-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no reports of sulfate on-site rapid detection agents have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, the preparation of sulfate detection agent

[0012] Weigh 4g of trichloroacetic acid and dissolve it in 10ml of ethanol, mix it with 20g of polyvinylpyrrolidone evenly, let it stand for 24 hours to volatilize the ethanol, grind it into powder, then mix it with 2g of barium chromate and 1g of calcium chloride to get the detection of sulfuric acid in water Detector for salt content.

Embodiment 2

[0013] Embodiment 2, determination of sulfate content in groundwater

[0014] Take 5ml of groundwater into a test tube, add 5ml of pure water, add 0.3g of the detection agent for detecting sulfate content in water, shake the test tube for 3 minutes, add 0.1g of potassium hydroxide, mix well, filter, and use a spectrophotometer (S- 4100, South Korea Shinco) measured the absorbance of the filtrate at a wavelength of 420nm, and the calculated sulfate concentration was 111mg / L, which was consistent with the national standard method (HJ / T34-2007) test result of 118mg / L, indicating that the detection agent was used to detect sulfate in groundwater The content is accurate and reliable.

Embodiment 3

[0015] Embodiment 3, determination of sulfate content in lake water

[0016] Take 10ml of lake water into a test tube, add 0.3g of sulfate detection agent, shake the test tube for 3 minutes, add 0.1g of potassium hydroxide, mix well, filter, and use a spectrophotometer (S-4100, Shinco Korea) to measure at a wavelength of 420nm The absorbance of the filtrate and the calculated sulfate concentration are 65.7mg / L, which is consistent with the national standard method (HJ / T34-2007) test result of 66.1mg / L, indicating that the detection of sulfate content in lake water with this detector is accurate and reliable.

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Abstract

The invention relates to a detection reagent for detecting sulfate contents in a water body. The detection reagent is prepared by steps of weighing barium chromate, calcium chloride, trichloroacetic acid, absolute ethyl alcohol, and polyvinylpyrrolidone according to a weight ratio of 2:1:4:10:20; dissolving the trichloroacetic acid into the absolute ethyl alcohol, adding the polyvinylpyrrolidone and mixing uniformly; allowing the mixture to stand and be exposed to air for 24h; grinding into powder after the ethyl alcohol is volatilized; and mixing with the barium chromate and the calcium chloride. When the detection reagent is used, after steps of adding 0.1-0.3 g of the detection reagent into 5-10 mL of a water sample, shaking and mixing for 3 min, adding 0.1g of potassium hydroxide and mixing uniformly, and filtrating, then the filtrate can be detected by the detection reagent by using a spectrophotometer or a colorimeter. The detection reagent provided by the invention has advantages of carry convenience, low price, and accurate and reliable results, and can be applied for on-site quantitative determination of sulfate concentrations for surface water, underground water, production water, domestic water, and the like.

Description

technical field [0001] The invention relates to a detection agent for detecting sulfate content in water bodies, in particular to a quantitative analysis method for sulfate concentration in environmental water bodies, and belongs to the technical field of environmental monitoring. Background technique [0002] A small amount of sulfate in water is harmless to animals and humans, but when it exceeds 250 mg / L, it will cause diarrhea; boiler water contains sulfate, which can form scale when it encounters calcium ions; sulfate and cement form aluminum calcium sulfate, which causes volume expansion and concrete Collapse; geological departments often use SO 4 2- and Cl - The ratio of content is the main sign of sulfide deposit survey, and it has certain reference value for finding sulfide beds and understanding the distribution of oil fields. Therefore, the determination of sulfate in water is of great significance in the fields of environmental protection, geology, construction...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 郜洪文林志国
Owner TONGJI UNIV
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