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SPECTROPHOTOMETRIC DETERMINATION OF PH BY FLOW-INJECTION

被引：9
|
作者：
PIA, SH
WALTMAN, DP
HILLMAN, DC
STREET, KW
机构：
[1] LOCKHEED ENGN & SCI CO INC,1050 E FLAMINGO RD,SUITE 120,LAS VEGAS,NV 89119
[2] NASA,LEWIS RES CTR,CLEVELAND,OH 44135
来源：
ANALYTICA CHIMICA ACTA | 1990年 / 231卷 / 01期
关键词：
D O I：
10.1016/S0003-2670(00)86392-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Flow injection is used for the determination of pH over a wide range. Using an appropriate combination of pH-indicating dyes, plots of absorbance vs. pH are linear in the range pH < 1-8 for static measurements and pH 3.6-6.8 in the flow-injection experiment. In the current configuration, the flow-injection method has the capability of measuring approximately 100 samples h-1 with a precision and accuracy of ±0.2 pH. The reasons for the linear calibration graphs, effects of ionic strength and day to day reproducibility are presented together with results for lake-water samples. © 1990.
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页码：21 / 26
页数：6
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