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ID 19976
Eprint ID
19976
FullText URL
Author
Kubota Hiroki
Katsuki Miki
Motomizu, Shoji
Abstract
solvent-extraction Spectrophotometric method for the determination of anionic surfactants in water was developed with -(4-N, N-dimethylaminophenylazo)-2-methylquinoline (MQ) by batchwise and flow-injection techniques. The ion associates of MQ with anionic surfactants extracted into an organic phase showed a blue shift of the maximum absorption wavelength; their molar absorptivities were 4.5×10(4)l mol(-1) cm(-1) at 560nm. In the batchwise method, a 40-fold extraction concentration was possible. In the 20-fold concentration, the calibration graph was linear at concentration ranging from 1×10(-8)M to 7.5×10(-7)M of anionic surfactants, and the mean absorbances of the reagent blank and the 5×10(-7)M anionic surfactant (dodecylsulfate : LS(-)) were 0.024 and 0.518, respectively; the relative standard deviation for 10 measurements of 5×10(-7)M LS(-) was 0.28%. Foreign ions generally existing in river water did not interfere with the determination. This solvent-extraction spectrophotometric method was satisfactorily applied to a flow-injection method. The reagent MQ was recycled and repeatedly used at least for 7 months, and the efficiency of the reagent has not changed during at least this period.
Keywords
Spectrophotometry
ion association extraction
anionic surfactants
4-(4-N,N-dimethylaminophenylazo)-2-methylquinoline
batchwise method
flow-injection method
Published Date
1990-10-10
Publication Title
Analytical Sciences
Volume
volume6
Issue
issue5
Publisher
日本分析化学会
Publisher Alternative
Japan Society for Analytical Chemistry
Start Page
705
End Page
709
ISSN
0910-6340
NCID
AA10500785
Content Type
Journal Article
Official Url
http://www.journalarchive.jst.go.jp/english/jnlabstract_en.php?cdjournal=analsci1985&cdvol=6&noissue=5&startpage=705
language
英語
Copyright Holders
日本分析化学会
File Version
publisher
Refereed
True
DOI