SHIPBOARD FLOW-INJECTION METHOD FOR THE DETERMINATION OF MANGANESE IN SEA-WATER USING IN-VALVE PRECONCENTRATION AND CATALYTIC SPECTROPHOTOMETRIC DETECTION

被引：32

作者：

KOLOTYRKINA, IY ^{[1
]}

SHPIGUN, LK ^{[1
]}

ZOLOTOV, YA ^{[1
]}

TSYSIN, GL ^{[1
]}

机构：

[1] MV LOMONOSOV STATE UNIV,DEPT CHEM,MOSCOW 119899,USSR

来源：

ANALYST | 1991年 / 116卷 / 07期

关键词：

MANGANESE DETERMINATION; SEA-WATER; FLOW INJECTION; CATALYTIC REACTION; IN-VALVE PRECONCENTRATION;

D O I：

10.1039/an9911600707

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow injection method for the determination of manganese at trace level concentrations in sea-water is proposed. The in-valve ion-exchange microcolumn for preconcentration was directly coupled to the spectrophotometer. The spectrophotometric detection was based on the catalytic effect of Mn(II) on the oxidation of N,N-diethylaniline by potassium periodate in a neutral medium. Variation of the preconcentration time from 10 s to 10 min allowed the determination of manganese in the concentration range 20-mu-g-1-10 ng l-1. A sampling frequency of up to 15 h-1 and a relative standard deviation of 5-8% were achieved. The proposed method was successfully applied to the direct shipboard measurement of the manganese content in deep sea-water samples for the purpose of indicating the presence of active hydrothermal vents on the sea floor.

引用

页码：707 / 710

页数：4

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