ELECTRICAL-CONDUCTIVITY DETECTION ION CHR OMATOGRAPHY USING A SUPPRESSOR METHOD BASED ON ION ASSOCIATION MICELLE EXTRACTION

Citation
S. Motomizu et al., ELECTRICAL-CONDUCTIVITY DETECTION ION CHR OMATOGRAPHY USING A SUPPRESSOR METHOD BASED ON ION ASSOCIATION MICELLE EXTRACTION, Bunseki Kagaku, 44(12), 1995, pp. 1041-1048
Citations number
4
Language
GIAPPONESE
art.tipo
Article
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
0525-1931
Volume
44
Issue
12
Year of publication
1995
Pages
1041 - 1048
Database
ISI
SICI code
0525-1931(1995)44:12<1041:EDICOU>2.0.ZU;2-U
Abstract
A novel background suppressor method in conductivity detection/ion chr omatography for inorganic anions was developed. The eluent used was a dodecyltrimethylammonium hydroxide (C12H25-TMA(+)OH(-)) solution; a do decylbenzenesulfonic acid (H . DBS) solution was used to suppress the background conductivity. The eluate was mixed with the suppressor solu tion and the ion associate formed was extracted into the micelle of no nionic surfactant (polyoxyethylene (10) octylphenyl ether, Triton X-10 0) as a mixed micelle. The background conductivity was decreased to 24 mu S cm(-1) by the acid-base neutralization and micelle extraction. F or rapid analysis, a carbonate buffer solution (pH 10.8) was used: the solution was prepared by bubbling CO2 into the hydroxide eluent. The elution of sulfate ion with the carbonate buffer was accomplished with in 20 min. Chloride, nitrate and sulfate ions in river and tap waters were determined satisfactorily with 1.5X10(-3) MC(12)H(25)-TMA(+)OH(-) and CO2 (pH 10.8) as the eluent, and 1.5X10(-3) M H . DBS and 4% (w/w ) TX-100 as the suppressor solution by injecting 50 mu l of sample sol ution.