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Detection reagent of nitrite in water and preparation method of detection reagent

A technology for detecting reagents and nitrites, applied in the field of analytical chemistry, can solve the problems of cumbersome operation, rarely reported on-site detection, lengthy and time-consuming, etc., and achieves the effects of simple operation, low price, and easy portability.

Inactive Publication Date: 2015-03-11
SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Nitrite detection methods mainly include photometric method, flow injection method, ion chromatography, polarographic method, etc. Most of these methods are cumbersome to operate, lengthy and time-consuming, and have high requirements for the professional skills of operators, and they can only be used in laboratories. implement
Many researchers have made many improvements and innovations, but there are few reports on field detection

Method used

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  • Detection reagent of nitrite in water and preparation method of detection reagent

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Effect test

Embodiment 1

[0022] A reagent for detecting nitrite in water consists of the following components in parts by mass: 1 part of N-(1-naphthyl)-ethylenediamine hydrochloride, 40 parts of polyvinylpyrrolidone K-3040, 5 parts of manganese sulfate, 15 parts of sulfonamide, 40 parts of hydrochloric acid, 2 parts of sodium bicarbonate, 2 parts of sodium molybdate.

[0023] A preparation method of a detection reagent for nitrite in water, comprising the following steps:

[0024] a. Mix N-(1-naphthyl)-ethylenediamine hydrochloride, polyvinylpyrrolidone K-30 and sulfonamide uniformly in parts by mass to obtain substance A;

[0025] b. After completely mixing hydrochloric acid, manganese sulfate, sodium molybdate and sodium bicarbonate, dry at 80°C for 1 hour to obtain substance B;

[0026] c. After uniformly mixing substance A and substance B, dry at 40° C. for 0.5 hour to obtain a reagent for detecting nitrite in water.

Embodiment 2

[0028] A reagent for detecting nitrite in water consists of the following components in parts by mass: 2 parts of N-(1-naphthyl)-ethylenediamine hydrochloride, 50 parts of polyvinylpyrrolidone K-3050 parts, 10 parts of manganese sulfate, 20 parts of sulfonamide, 50 parts of hydrochloric acid, 5 parts of sodium bicarbonate, 3 parts of sodium molybdate.

[0029] A preparation method of a detection reagent for nitrite in water, comprising the following steps:

[0030] a. Mix N-(1-naphthyl)-ethylenediamine hydrochloride, polyvinylpyrrolidone K-30 and sulfonamide uniformly in parts by mass to obtain substance A;

[0031] b. After completely mixing hydrochloric acid, manganese sulfate, sodium molybdate and sodium bicarbonate, dry at 95°C for 4 hours to obtain substance B;

[0032] c. Mix substance A and substance B uniformly, and dry at 50° C. for 2 hours to obtain a reagent for detecting nitrite in water.

Embodiment 3

[0034] A reagent for detecting nitrite in water consists of the following components in parts by mass: 1.5 parts of N-(1-naphthyl)-ethylenediamine hydrochloride, 3 parts of polyvinylpyrrolidone K-3043 parts, 6 parts of manganese sulfate, 16 parts of sulfonamide, 42 parts of hydrochloric acid, 3 parts of sodium bicarbonate, 2.2 parts of sodium molybdate.

[0035] A preparation method of a detection reagent for nitrite in water, comprising the following steps:

[0036] a. Mix N-(1-naphthyl)-ethylenediamine hydrochloride, polyvinylpyrrolidone K-30 and sulfonamide uniformly in parts by mass to obtain substance A;

[0037] b. After completely mixing hydrochloric acid, manganese sulfate, sodium molybdate and sodium bicarbonate, dry at 85°C for 3 hours to obtain substance B;

[0038] c. Mix substance A and substance B uniformly, and dry at 42° C. for 1.5 hours to obtain a reagent for detecting nitrite in water.

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Abstract

The invention discloses a detection reagent of nitrite in water and a preparation method of the detection reagent. The detection reagent comprises the following components in parts by mass: 1-2 parts of N-(1-naphthyl)-ethylenediamine dihydrochloride, 40-50 parts of polyvinylpyrrolidoneK-30, 5-10 parts of manganese sulfate, 15-20 parts of sulfanilamide, 40-50 parts of hydrochloric acid, 2-5 parts of sodium bicarbonate and 2-3 parts of sodium molybdate. The preparation method of the detection reagent comprises the following steps: a, uniformly mixing N-(1-naphthyl)-ethylenediamine dihydrochloride, polyvinylpyrrolidoneK-30 and sulfanilamide; b, fully mixing hydrochloric acid, manganese sulfate and sodium molybdate with sodium bicarbonate; c, uniformly mixing a substance A with a substance B. By utilizing the detection reagent of nitrite in water, the detection of nitrite in a water sample can be completed in the field; the detection reagent has the advantages of being simple in operation, high in accuracy and high in speed.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a detection reagent for nitrite in water and a preparation method thereof. Background technique [0002] Nitrite is a water-soluble, unstable, and easily decomposed inorganic salt. It is a white crystalline powder, odorless, and weakly alkaline. Nitrite is widely used in various industries. In industry, nitrite is often used as industrial salt, so a large amount of nitrite is contained in industrial wastewater; in the food industry, nitrite is often used as The color development and pickling preparation of meat products is used to improve the flavor, color and quality of meat products; in agriculture, the use of chemical fertilizers is not long, but the use of nitrogen fertilizers has reached 1.7 billion tons by 2000, and the sub The main source of nitrate pollution is the excessive use of nitrogen fertilizers; the excessive use of nitrogen fertilizers, ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
Inventor 夏戊君凌云陆赛君金可心陈亮程胜凌天阳陆鼎
Owner SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
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