A LOW COST AUTOSAMPLER FOR FLOW INJECTION ANALYSIS.

被引：21
|
作者：
Kamogawa, Marcos Y. [1 ]
Teixeira, Marcelo Alves [2 ]
机构：
[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Ciencias Exatas, BR-13418900 Piracicaba, SP, Brazil
[2] Univ Estadual Mato Grosso do Sul, BR-79830000 Dourados, MS, Brazil
来源：
QUIMICA NOVA | 2009年 / 32卷 / 06期
关键词：
ammonium; parallel ports; step motors;
D O I：
10.1590/S0100-40422009000600048
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A LOW COST AUTOSAMPLER FOR FLOW INJECTION ANALYSIS. This paper describes a homemade autosampler for flow injection analysis (FIA), constructed with two step motors from old floppy disk drives (51/4-inch). The autosampler was connected to a computer through the parallel port and the sampling process was controlled by software in Quick Basic. The performance of the system was assessed by the determination of ammonium, based on the gaseous diffusion into a bromocresol purple solution, following the spectrophotometric determination of change in absorbance. The easy and simple construction is the main characteristics of this equipment and analytical results with RSD lower than 1% were obtained.
引用
收藏
页码：1644 / 1646
页数：3
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