KINETIC SPECTROFLUOROMETRIC DETERMINATION OF NITRITE AND NITRATE AT THE NANOGRAMS PER MILLILITER LEVEL BY MANUAL AND FLOW-INJECTION METHODS

被引：26
|
作者：
PEREZRUIZ, T
MARTINEZLOZANO, C
TOMAS, V
机构：
[1] Department of Analytical Chemistry, Faculty of Sciences, University of Murcia
来源：
ANALYTICA CHIMICA ACTA | 1992年 / 265卷 / 01期
关键词：
CATALYTIC METHODS; FLOW INJECTION; FLUOROMETRY; KINETIC METHODS; FOODS; MEAT; NITRATE; NITRITE; WATERS;
D O I：
10.1016/0003-2670(92)85160-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The catalytic effect of nitrite on the oxidation of phenosafranine by bromate in acidic medium was studied by using the decrease in fluorescence intensity of phenosafranine. This kinetic-spectrofluorimetric method for nitrite is linear over the range 0.9-13.8 ng ml-1 with a relative standard deviation of about 1.5%. The method can be successfully adapted to flow-injection analysis in the stopped-flow mode. Manual and flow-injection methods were satisfactorily applied to the determination of nitrite in waters and meat products. The inclusion of a copperized cadmium column in the flow system allowed the determination of nitrate and the sequential determination of nitrate and nitrite in mixtures.
引用
收藏
页码：103 / 110
页数：8
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