A SIMPLE LOW-COST CONDUCTIVITY CELL FOR FLOW-ANALYSIS MEASUREMENTS

被引：2

作者：

DEANDRADE, JC

COELHO, NMM

PARKER, WC

机构：

[1] Universidade Estadual de Campinas, Instituto de Química, 13081 Campinas, SP

来源：

ANALYTICAL LETTERS | 1992年 / 25卷 / 07期

关键词：

FLOW-CELL; CONDUCTIVITY MEASUREMENTS; PLANT ANALYSES;

D O I：

10.1080/00032719208016131

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A versatile low-cost conductivity flow-cell design is proposed. Its characteristics permit discrete variations in the cell volume and in the electrode area/distance ratio by varying the sealing gasket thickness, favoring high sensitivity applications in continuous flow measurements. Its dynamic characteristics as a flow conductivity detector were observed using a single-line FIA system and standard KCl solutions, while its performance in routine work was tested by determining the NH4+ content in plant Kjeldahl digests using FIA processing. These results are in good agreement with those obtained by the usual distillation/titration method.

引用

页码：1331 / 1343

页数：13

共 10 条

[1]

Bremner J. M., 1982, METHODS SOIL ANAL 2

[2] RAPID DIRECT DETERMINATION OF AMMONIUM AND NITRATE IN SOIL AND PLANT-TISSUE EXTRACTS [J].