TURBIDIMETRIC DETERMINATION OF POTASSIUM BY FLOW-INJECTION ANALYSIS

被引：0
|
作者：
TORRES, JRD [1 ]
TUBINO, M [1 ]
机构：
[1] UNIV ESTADUAL CAMPINAS,UNICAMP,INST QUIM,BR-13081970 CAMPINAS,SP,BRAZIL
来源：
ANALYTICAL LETTERS | 1994年 / 27卷 / 08期
关键词：
POTASSIUM; TURBIDIMETRY; FLOW INJECTION; TETRAPHENYLBORON;
D O I：
暂无
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A turbidimetric flow injection analytical method was developed for the determination of potassium (K) after precipitation with a 3% sodium tetraphenylboron solution at pH 9. The minimum detection limit is about 1.0 mu g K/mL. Calibration graphs of absorbance versus concentration are linear up to 20 mu g K/mL with a correlation coefficient of 0.9982. The average sampling rate is about 60 samples per hour. Relative standard deviations (s%) obtained with standard solutions of potassium are ca. 1%. Several samples of plant leaves, bottle mineral waters and serum rehydration solutions were analyzed.
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页码：1625 / 1636
页数：12
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