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A rapid detection method for borate in drinking water

A detection method and borate technology, applied in the field of analytical chemistry, can solve the problems of high hardware requirements, easy to be interfered, and low sensitivity of the test paper method, and achieve the effects of high sensitivity, simple operation and low cost

Inactive Publication Date: 2016-04-20
INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ICP-MS method requires strong professional knowledge and high hardware requirements, so it cannot be used for on-site detection; the spectrophotometric method takes a long time; the test paper method has problems such as low sensitivity and easy interference
At the same time, my country's water quality testing capabilities are also worrying. Only a few institutions in the country have the testing capabilities of 106 full indicators, most of them have less than 51 testing capabilities, and the average testing capability is only 33 items. Testing capacity below national average

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  • A rapid detection method for borate in drinking water

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Experimental program
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Effect test

Embodiment 1

[0019] The method of the present invention is to the recovery rate of borate in different water samples

[0020] High-efficiency adsorption column: the filler is layered magnesium aluminum hydroxide with a particle size of 80-200 mesh, the mass is 0.5g, the specification is: inner diameter 10mm, volume 50mL, the material of the sieve plate is glass sand core, the pore size is 20μm, and the mesh number of nylon cloth is 500 head.

[0021] Collect several common drinking water samples, add borate-containing standard solution respectively, so that the concentration of borate is the limit concentration specified in the national standard of 0.5mg / L and 5mg / L, and then take 100mL water samples to flow through the adsorption After the adsorption is completed, use 5mL of 3mol / L NaCl aqueous solution to elute the borate in the adsorption column, and detect the concentration of borate in the eluent by spectrophotometry. Each sample was measured 3 times in parallel, and the average reco...

Embodiment 2

[0026] Comparison of the test results of tap water and the test results of added borate

[0027] Tap water was chosen for the experiment, and the test results showed that there was no borate in the tap water.

[0028] The filler of the high-efficiency adsorption column is layered magnesium aluminum hydroxide with a particle size of 80-200 mesh, the mass is 5g, the specification is: inner diameter 30mm, volume 100mL, the material of the sieve plate is glass sand core, the pore size is 60μm, and the nylon cloth mesh is 100 mesh .

[0029] The process of adsorption, elution and color development is carried out by the method of the present invention. Take 100mL tap water sample and flow through the adsorption column. After the adsorption is completed, use 5mL0.5mol / L NaOH aqueous solution to elute the borate on the adsorbent. 1ml concentration is the curcumin reaction of 5g / L.

[0030] Measure respectively 100mL deionized water, 100mL tap water, 100mL tap water adding borate (b...

Embodiment 3

[0032] Comparison of the test results of drinking purified water and the test results of added borate

[0033] China Resources C'estbon was selected to drink purified water in the experiment, and the test results showed that China Resources C'estbon drank purified water.

[0034] The filler of the high-efficiency adsorption column is layered magnesium aluminum hydroxide with a particle size of 80-200 mesh, the mass is 2.5g, the specification is: inner diameter 20mm, volume 75mL, the material of the sieve plate is glass sand core, the pore size is 120μm, and the mesh number of nylon cloth is 300 head.

[0035] The process of adsorption, elution and color development is carried out by the method of the present invention. Take 100mL water sample to flow through the adsorption column, after the adsorption is completed, use 5mL NaCl and NaOH mixed solution, the volume ratio of NaCl aqueous solution and NaOH aqueous solution is 4:11, the concentration of NaCl aqueous solution is 5m...

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Abstract

The invention discloses a method for rapidly detecting borate in drinking water. The method comprises the following steps: adsorbing borate in a large-volume water sample through a high-efficiency adsorption column for detecting multiple harmful negative ions in the drinking water (the packing is layered magnesium aluminum hydroxide), and eluting the borate attached to an adsorbent by using a small-volume eluent, so that high-rate concentration is realized; developing the concentrated borate and an indicator under the condition that a certain amount of buffer solution is added, comparing with colors on a color chart, judging whether the borate in the water sample exceeds the standard, and thus finishing preliminary screening of the water sample. According to the method for rapidly detecting borate in drinking water, detection of the borate in the water sample can be finished on site, and the method has the advantages of low time consumption, high sensitivity, simple and convenient operation, low cost and the like. According to the method, the detection limit can reach 0.05mg / L.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a rapid detection method for borate in drinking water. Background technique [0002] Boron is a special inorganic non-metallic element, which is a typical electron-deficient atom. In nature, it generally coordinates with oxygen to form boroxic acid or boronate. In the food industry, boric acid is often used as a preservative for milk, dairy products, meat, or soy products; especially borax, which can be used for food preservation, increase food elasticity, brittleness, and expand food; while in the chemical industry , boric acid is the main raw material for the manufacture of boron nitride, boron carbide and other boron compounds. Boric acid can also be used in the leather industry, photography and gemstone manufacturing; in agriculture, boric acid can be used as fertilizer and insecticide; commonly used in medical treatment As for disinfectants and ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 蔡春平叶行王丹红李捷薛芝敏
Owner INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU