Indirect atomic absorption spectrometric determination of citric acid by continuous precipitation

被引：0
|
作者：
M. C. Yebra
R. M. Cespón
机构：
[1] Department of Analytical Chemistry,
[2] Nutrition and Bromatology,undefined
[3] Chemistry Faculty,undefined
[4] University of Santiago,undefined
[5] E-15706-Santiago de Compostela,undefined
[6] Spain,undefined
来源：
Fresenius' Journal of Analytical Chemistry | 1999年 / 365卷
关键词：
Standard Deviation; Precipitation; Filtration; Citric Acid; Atomic Absorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A continuous precipitation and filtration flow system for the separation of citric acid by precipitation with lead and indirect flame atomic absorption spectrometry is proposed. The precipitate is formed by injecting the lead solution into a carrier containing the sample and is subsequently retained on a filter. By using this reversed precipitation flow-injection configuration, citric acid was determined in the range 2–40 μg mL–1, with a relative standard deviation of 2.9% at a sampling frequency of 60 samples h–1. This method has been applied to the determination of citric acid in fruit juices, carbonated soft drinks and sweets.
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页码：370 / 373
页数：3
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