Gas/diffusion flow injection determination of ammonium ions in river and waste waters by conductometry

被引：4

作者：

Vlcek, J ^{[1
]}

Kubán, V ^{[1
]}

机构：

[1] Mendel Univ Agr & Forestry, Dept Chem & Biochem, CZ-61300 Brno, Czech Republic

来源：

COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS | 1999年 / 64卷 / 12期

关键词：

ammonium; flow injection analysis; gas diffusion; river water; waste water; conductometry; electrochemistry;

D O I：

10.1135/cccc19991966

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An FIA conductometric method for monitoring of ammonium ions in river and waste waters is proposed. A very good detection limit (x(D) 5.6 mu mol l(-1)) was obtained at 100/20 s preconcentration/rinsing times and 2 ml sample consumption per analysis at the flow rate 0.8 ml min(-1). The detection limit x(D) can be further improved at longer preconcentration/rinsing times. Precipitation of polyvalent metal ions (mainly Fe(III)) was eliminated by addition of 0.5 mmol l(-1) EDTA prior to injection. The results are comparable with those obtained by spectrophotometry (Nessler's reagent).

引用

页码：1966 / 1974

页数：9

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