Simultaneous spectrophotometric determination of phosphate and silicate by a stopped-flow sequential injection method

被引：14

作者：

Mas-Torres, F ^{[1
]}

Muñoz, A ^{[1
]}

Estela, JM ^{[1
]}

Cerdà, V ^{[1
]}

机构：

[1] Univ Balearic Isl, Dept Chem, Palma de Mallorca 07071, Spain

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2000年 / 77卷 / 03期

关键词：

sequential injection; kinetic determination; phosphate; silicate; wastewater;

D O I：

10.1080/03067310008032682

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sequential injection analysis method for the simultaneous spectrophotometric determination of phosphate and silicate has been developed. The method is based on the different reaction rates of the heteropolymolybdate formation reactions. Concentrations within the range 0.026-0.485 mmol P l(-1) and 0.125-2.848 mmol Si l(-1) have been determined at a frequency of 30 samples per hour. An R.S.D. of 2.1% was obtained for 0.162 mmol P l(-1) and of 1.1% for 1.424 mmol Si l(-1). The method was found to be suitable for the determination of phosphate and silicate in wastewater.

引用

页码：185 / 202

页数：18

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