Flow-injection analysis spectrophotometric determination of nitrite and nitrate in water samples by reaction with proflavin

被引：48
作者：
Guerrero, RS
Benito, CG
Calatayud, JM
机构：
[1] UNIV VALENCIA,DEPT QUIM ANALIT,E-46100 VALENCIA,SPAIN
[2] COLEGIO UNIV CEU,DEPT QUIM,MONCADA,SPAIN
来源：
TALANTA | 1996年 / 43卷 / 02期
关键词：
nitrite; nitrate; proflavin; flow-injection analysis; spectrophotometry;
D O I：
10.1016/0039-9140(95)01749-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A flow-injection manifold is proposed for determination of nitrite based on the reaction with 3,6-diamino acridine (proflavin sulfate) in hydrochloride acid medium. The assembly is adapted for nitrate determination by including a reductive column filled with copperized cadmium. The influence of foreign substances is also studied. The method gives a linear calibration graph over the range 0.06-4 mg l(-1) nitrite, with an RSD <0.5%. The method was applied to nitrite and nitrate determinations in either waste water or coastal marine water samples.
引用
收藏
页码：239 / 246
页数：8
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