痕量亚硝酸根的极谱测定

陈立国; 訾言勤

环境化学

痕量亚硝酸根的极谱测定

陈立国, 訾言勤. 痕量亚硝酸根的极谱测定[J]. 环境化学, 1992, 11(5): 77-80.

引用本文:

陈立国, 訾言勤. 痕量亚硝酸根的极谱测定[J]. 环境化学, 1992, 11(5): 77-80.

Chen Liguo, Zi Yanqin . METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY[J]. Environmental Chemistry, 1992, 11(5): 77-80.

Citation:

Chen Liguo, Zi Yanqin . METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY[J]. Environmental Chemistry, 1992, 11(5): 77-80.

痕量亚硝酸根的极谱测定

1.
淮北煤炭师范学院化学系, 淮北, 235000

METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY

1.
Department of Chemistry, Huaibei Coal Teacher's College, Huaibei, 235000

摘要: 在酸性介质中,次甲基蓝与亚硝酸根发生亚硝化反应,本文选用0.08mol/l的盐酸,其亚硝化产物在—0.65V(us.SCE)附近产生一灵敏的极谱波,亚硝酸根浓度在0.002—0.24ug/ml范围内与二次导数波高成直线关系,本法用于水样和蔬菜中亚硝酸根的测定,选择性好,灵敏度较高。
- 亚硝酸根 /
- 次甲基蓝 /
- 极谱法
Abstract: A fairly selective and simple method for the determination of trace nitrate in acidic medium by polarography is developed. The behaviour of polarographic wave of methylene blue and its nitro-sation product in acidic medium have been studied.The peak potential of polarographic wave of nitrosation product is-0.65V (vs.SCE). The peak height is proportional to the concentration of nitrite in the range of 0.002-0.24ug/ml, this polarographic wave is an adsorption wave of nitrosation product. The method used has sen-sitivity(0.002ug/ml) and good selectivity.Most of the common ions show no or little effect on the determination, and this method has been used to determine nitrite in water and vegetables by single sweep oscillopolarography which was found to be simple and rapid.
- nitrite /
- methylene blue /
- polarography

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陈立国, 訾言勤. 痕量亚硝酸根的极谱测定[J]. 环境化学, 1992, 11(5): 77-80.

引用本文:

陈立国, 訾言勤. 痕量亚硝酸根的极谱测定[J]. 环境化学, 1992, 11(5): 77-80.

Chen Liguo, Zi Yanqin . METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY[J]. Environmental Chemistry, 1992, 11(5): 77-80.

Citation:

Chen Liguo, Zi Yanqin . METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY[J]. Environmental Chemistry, 1992, 11(5): 77-80.

痕量亚硝酸根的极谱测定

1. 淮北煤炭师范学院化学系, 淮北, 235000

收稿日期: 1991-02-04

关键词:

亚硝酸根 /
次甲基蓝 /
极谱法

摘要: 在酸性介质中,次甲基蓝与亚硝酸根发生亚硝化反应,本文选用0.08mol/l的盐酸,其亚硝化产物在—0.65V(us.SCE)附近产生一灵敏的极谱波,亚硝酸根浓度在0.002—0.24ug/ml范围内与二次导数波高成直线关系,本法用于水样和蔬菜中亚硝酸根的测定,选择性好,灵敏度较高。

English Abstract

METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY

1. Department of Chemistry, Huaibei Coal Teacher's College, Huaibei, 235000

Received Date: 1991-02-04

Keywords:

nitrite /
methylene blue /
polarography

Abstract: A fairly selective and simple method for the determination of trace nitrate in acidic medium by polarography is developed. The behaviour of polarographic wave of methylene blue and its nitro-sation product in acidic medium have been studied.The peak potential of polarographic wave of nitrosation product is-0.65V (vs.SCE). The peak height is proportional to the concentration of nitrite in the range of 0.002-0.24ug/ml, this polarographic wave is an adsorption wave of nitrosation product. The method used has sen-sitivity(0.002ug/ml) and good selectivity.Most of the common ions show no or little effect on the determination, and this method has been used to determine nitrite in water and vegetables by single sweep oscillopolarography which was found to be simple and rapid.

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痕量亚硝酸根的极谱测定

METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY

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痕量亚硝酸根的极谱测定

English Abstract

METHYLENE BLUE FOR DETERMINING TRACE NITRITE BY POLAROGAPHY

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