DETERMINATION OF NITRATE IN NATURAL-WATERS WITH THE PHOTOINDUCED CONVERSION OF NITRATE TO NITRITE

被引：64

作者：

TAKEDA, K ^{[1
]}

FUJIWARA, K ^{[1
]}

机构：

[1] HIROSHIMA UNIV,FAC INTEGRATED ARTS & SCI,HIROSHIMA 730,JAPAN

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 276卷 / 01期

关键词：

FLOW INJECTION; UV-VISIBLE SPECTROPHOTOMETRY; NITRATE; WATERS;

D O I：

10.1016/0003-2670(93)85035-I

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A rapid, sensitive and maintenance-free method for the determination of nitrate ion using the photo-induced conversion of nitrate to nitrite is described. A flow-injection system, equipped with a spectrophotometric detector and a UV irradiation coil cell in which nitrate ion was reduced to nitrite ion, was developed and tested for river and sea waters. With this flow system, the signal intensity depended strongly on the pH of the carrier solution. The detection limit for nitrate was ca. 0.05 muM and ten samples could be determined per hour. The method permitted the determination of nitrate without a copperized cadmium column.

引用

页码：25 / 32

页数：8

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