A new method of analysis of peroxydisulfate using ion chromatography and its application to the simultaneous determination of peroxydisulfate and other common inorganic ions in a peroxydisulfate matrix

被引:27
|
作者
Khan, Nymul E. [1 ]
Adewuyi, Yusuf G. [1 ]
机构
[1] N Carolina Agr & Tech State Univ, Dept Chem & Bioengn, Greensboro, NC 27411 USA
基金
美国国家科学基金会;
关键词
Inorganic anions; Peroxydisulfate analysis; Temperature effects; Separation optimization; Retention behavior; Gradient elution; SPECTROPHOTOMETRIC DETERMINATION; IODOMETRIC METHOD; FLOW-INJECTION; PERSULFATE; OXIDATION; ANIONS; ABSORPTION; SEPARATION; NO;
D O I
10.1016/j.chroma.2010.11.038
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A new method for the determination of peroxydisulfate using ion chromatography has been developed. Elution of peroxydisulfate was effected by isocratic elution using 200 mM NaOH at 40 degrees C. A modification of the method using gradient elution was able to simultaneously determine other common inorganic ions (nitrate, nitrite, sulfate and chloride) down to significantly low concentrations in a peroxydisulfate matrix. The relative standard deviations (RSD) were in the range of 0.5-5%, for peak areas and <0.2% for peak retention times. The recoveries were between 95% and 120% for a concentration range of about 0.5-42 ppm. The limit of detection for peroxydisulfate ion was 0.2 ppm and for the other ions were <= 2 x 10(-2) ppm. The calibration curves were linear with slope and intercepts close to 1 and 0, respectively. (C) 2010 Elsevier B.V. All rights reserved.
引用
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页码:392 / 397
页数:6
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