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Rapid determination method of sulfate and preparation of test paper

A sulfate and test paper technology, applied in the field of chemical analysis, can solve the problems of cumbersome colorimetric filtration operation, unfavorable rapid determination, unacceptable and other problems, and achieves the effects of high color sensitivity, fast response time, and easy operation.

Active Publication Date: 2019-04-12
GUANGDONG HUANKAI MICROBIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the mass concentrations of calcium sulfate and magnesium sulfate reach 1000mg / L and 850mg / L respectively, the water will produce a peculiar smell, which is unacceptable
[0003] Sulfate is usually measured by barium sulfate turbidimetry, barium chromate spectrophotometry, titration and other methods, and the detection limit is 200mg / L, but the turbidimetric method uses a spectrophotometer to measure it, which is difficult to distinguish with the naked eye; the filtration operation of the colorimetric method is more cumbersome The turbidity produced by the titration method will cause large errors, and these methods are not conducive to the rapid determination of the scene, so it is urgent to develop a convenient and reliable sulfate test product

Method used

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  • Rapid determination method of sulfate and preparation of test paper
  • Rapid determination method of sulfate and preparation of test paper
  • Rapid determination method of sulfate and preparation of test paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use pure water to prepare barium perchlorate-containing (color-changing paper sheet 1 barium perchlorate concentration: 0.42g / L, color-changing paper sheet 2 barium perchlorate concentration: 1.24g / L, color-changing paper sheet 3 barium perchlorate concentration: 3.56g / L, color-changing paper 4 barium perchlorate concentration: 8.44g / L), 0.75g / L thorium reagent, 1.62g / L carbonyl alcohol ethoxylate, 1.65g / L Alcosperse 149 (acrylic acid polymer, Manufacturer: AkzoNobel), 85g / L polyvinyl alcohol, 1.85mol / L trishydroxymethyl aminomethane, 1.1g / L sodium tetraborate mixed color solution. Soak the chromatographic filter paper completely in the above mixed chromogenic solution for about 10 minutes, take out the filter paper, and dry it in vacuum at 80°C. After drying, cut the filter paper into small pieces of 5×6mm, in order from top to bottom (see figure 1 ) is glued on the corresponding position of the 5×80mm strip bottom plate to make sulfate test paper 1#.

Embodiment 2

[0033] Use pure water to prepare barium perchlorate-containing (color-changing paper sheet 1: barium perchlorate concentration is 0.42g / L, color-changing paper sheet 2: 1.24g / L, color-changing paper sheet 3: 3.56g / L, color-changing paper sheet 4: 8.44g / L), 2.8g / L thorium reagent, 2.4g / L lauryl alcohol ethoxylate, 1.95g / L Alcosperse149, 95g / L polyethylene glycol, 2.05mol / L trimethylol amino A mixed chromogenic solution of methane and 1.2g / L sodium tetraborate. Soak the chromatographic filter paper completely in the above mixed chromogenic solution for about 10 minutes, take out the filter paper, and dry it in vacuum at 80°C. After drying, cut the filter paper into small pieces of 5×6mm, and glue them on the corresponding positions of the 5×80mm strip bottom plate in order to make sulfate test paper 2#.

Embodiment 3

[0035] Use pure water to prepare barium perchlorate-containing (color-changing paper sheet 1: barium perchlorate concentration is 0.42g / L, color-changing paper sheet 2: 1.24g / L, color-changing paper sheet 3: 3.56g / L, color-changing paper sheet 4: 8.44g / L), 4.8g / L Thorium Reagent, 2.1g / L Fatty Amine Polyoxyethylene Ether, 3.15g / L Alcosperse 149DRY, 80g / L Gum Arabic, 1.4mol / L Tris, 1.05g / L sodium tetraborate mixed chromogenic solution. Soak the chromatographic filter paper completely in the above mixed chromogenic solution for about 10 minutes, take out the filter paper, and dry it in vacuum at 80°C. After drying, cut the filter paper into small pieces of 5×6mm, and glue them on the corresponding positions of the 5×80mm strip-shaped bottom plate in order to make sulfate test paper 3#.

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Abstract

The invention discloses a rapid determination method of sulfate and preparation of test paper. The rapid determination method has the characteristics that the response time is short, the sensitivity is high, stability is good, the measuring range reaches 1600 mg / L, and operation is easy and convenient, and the content of the sulfate in a sample can be quickly detected; the test paper has resistance in preservation, and the quality guarantee period is 12 or more months; testing is easy and convenient; and a handheld bottom plate of the test paper is prevented from being polluted, and the test paper is suitable for most detection of the concentration of the sulfate in water.

Description

technical field [0001] The invention belongs to the field of chemical analysis, and in particular relates to a rapid determination method for sulfate concentration and the preparation of test paper. Background technique [0002] Sulfate often exists in drinking water, and its main source is the sulfate of formation minerals, mostly in the form of calcium sulfate and magnesium sulfate; the dissolution of gypsum and other sulfate deposits; seawater intrusion, sulfite and sulfide Sulfates, etc. are oxidized in well aerated surface water. Domestic sewage, chemical fertilizers, sulfur-containing geothermal water, mine wastewater, sulfate or sulfuric acid industrial wastewater produced in tanning, paper manufacturing, etc., can all increase the sulfate content in drinking water. Diarrhea, dehydration, and gastrointestinal disturbances can occur if a person ingests large amounts of sulfates. Water containing more than 600 mg / L of magnesium sulfate is used as a cathartic. When th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 黄报亮邓金花秦惠张丽蓉
Owner GUANGDONG HUANKAI MICROBIAL SCI & TECH
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