摘要： A simple sample pretreatment technique, dispersive micro-solid phase extraction, was applied for the extraction of N -nitrosodimethylamine (NDMA) and other four N -nitrosamines (NAs) from samples of swimming pool water. The parameters affecting the extraction efficiency were systematically investigated. The best extraction conditions involved immersing 75 mg of carbon molecular sieve, Carboxen™ 1003 (as an adsorbent), in a 50-mL water sample (pH 7.0) containing 5% sodium chloride in a sample tube. After 20 min of extraction by vigorous shaking, the adsorbent was collected on a filter and the NAs desorbed by treatment with 150 μL of dichloromethane. A 10-μL aliquot was then directly determined by large-volume injection gas chromatography with chemical ionization mass spectrometry using the selected ion storage mode. The limits of quantitation were <0.9 ng/L. The precision for these analytes, as indicated by relative standard deviations, were <8% for both intra- and inter-day analyses. Accuracy, expressed as the mean extraction recovery, was between 62% and 109%. A preliminary analysis of swimming pool water samples revealed that NDMA was present in the highest concentration, in the range from n.d. to 100 ng/L. 其他題名： Anal Bioanal Chem 出版者： Berlin/Heidelberg: Springer-Verlag 出版日期： 2012-02 出處： Analytical and bioanalytical chemistry, 2012-02, Vol.402 (6), p.2209-2216 資源來源： EBSCOhost Academic Search Premier 版權： Springer-Verlag 2012 識別號： ISSN: 1618-2642 識別號： ISSN: 1618-2650 識別號： EISSN: 1618-2650 識別號： DOI: 10.1007/s00216-011-5681-0 識別號： PMID: 22222914
