Rapid and selective determination of free chlorine in aqueous solution using electrophilic addition to styrene by gas chromatography/mass spectrometry

Kengo Wakigawa, Akinaga Gohda, Sunao Fukushima, Takeshi Mori, Takuro Niidome, Yoshiki Katayama

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We developed a rapid and selective method for determination of free chlorine in aqueous solution by gas chromatography/mass spectrometry for the first time. Free chlorine was converted to styrene chlorohydrin using electrophilic addition to styrene in sodium acetate buffer solution (pH 5). The chlorine derivative obtained was extracted with chloroform, and then analyzed by GC/MS. The calibration curve showed good linearity from 0.2-100 μg/mL (as available chlorine). The detection limit was 0.1 μg/mL, and the intra- and interday accuracy were measured at concentrations of 10, 50, and 75 μg/mL to be -1.3 to 6.9% (intraday) and 3.8-8.0% (interday) as % Bias. The precision was between 1.4 and 4.5% as % RSD. These results indicate that this method is a superior technique for the identification of free chlorine. This method was successfully applied to quantification in commercial samples and in samples of a criminal case.

Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalTalanta
Volume103
DOIs
Publication statusPublished - Jan 15 2013

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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