کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1208023 965288 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Automated on-line in-tube solid-phase microextraction-assisted derivatization coupled to liquid chromatography for quantifying residual dimethylamine in cationic polymers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Automated on-line in-tube solid-phase microextraction-assisted derivatization coupled to liquid chromatography for quantifying residual dimethylamine in cationic polymers
چکیده انگلیسی

A method for the analysis of dimethylamine (DMA) by automated in-tube solid-phase microextraction (IT-SPME)-supported chemical derivatization coupled with high-performance liquid chromatography was developed. Extraction, derivatization and desorption were studied by using a capillary coated with 95% polydimethylsiloxane and 5% polydiphenylsiloxane. Solution derivatization and automated IT-SPME derivatization using 9-fluorenylmethyl chloroformate (FMOC) were compared. The proposed procedure provided adequate linearity, accuracy and precision in the 0.2–2.0 μg/mL concentration interval, and the limit of detection (LOD) was 50 ng/mL. The main advantages of the proposed procedure are: (i) no off-line sample manipulation, (ii) rapidity, as the total analysis time is about 10 min, (iii) specificity for the samples assayed, (iv) minimal consumption of FMOC reagent and (v) minimal residues. Therefore, the proposed method is an environmental-friendly and cost-effective alternative for the control of residual DMA in polymeric cationic surfactants used like flocculants in water treatment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1188, Issue 2, 25 April 2008, Pages 118–123
نویسندگان
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