Application of Doehlert matrix to the study of flow injection procedure for selenium (IV) determination

A method for the rapid determination of selenium is reported. It is based on the injection of selenium sample into a stream of KI and subsequent measurement of the increase of the absorption at 290nm due to the formation of I3−. A Doehlert matrix was applied for the determination of the optimal work...

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Bibliographic Details
Published inTalanta (Oxford) Vol. 63; no. 4; pp. 1089 - 1094
Main Authors Hellal, F., Dachraoui, M.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 08.07.2004
Oxford Elsevier
Subjects
Analytical chemistry
Chemistry
CuInSe2
Doehlert matrix
Exact sciences and technology
Selenium
Spectrometric and optical methods
CuInSe2
FI
Doehlert matrix
Selenium
Trace analysis
Cationic resin
Thin film
Absorption spectrometry
Standard curve
Standard deviation
Selenium IV
Flow injection
Ultraviolet visible spectrometry
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Summary:A method for the rapid determination of selenium is reported. It is based on the injection of selenium sample into a stream of KI and subsequent measurement of the increase of the absorption at 290nm due to the formation of I3−. A Doehlert matrix was applied for the determination of the optimal working conditions. With the developed method, a linear calibration curve from 1 to 10ppm was obtained. For the analysis of semiconducting thin layers of CuInSe2 (CIS), a cationic resin was added to the sample solution in order to eliminate the effect of copper and indium on the absorbance values. With the developed procedure a sample throughput of 36 samples per hour and a relative standard deviation 1.1% was achieved.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2004.01.011