00000nam 2200000zi 4500 9.877354 CaOODSP 20241203113651 m o d f cr bn||||||||| 190801s1993 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre En13-5/93-70E-PDF Onuska, Francis I., 1935- author. Determination of toxaphene in soil by electron capture negative ion mass spectrometry and capillary column gas chromatography / F.I. Onuska, K.A. Terry, A. Seech and M. Antonic. Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1993] 1 online resource (4 unnumbered pages, 13 pages, 3 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 93-70 Page 12 blank and unnumbered in original print edition and omitted in this copy. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 9). "Although toxaphene is now limited in use, interest in its analysis continues because of its persistence and widespread atmospheric transport in the environment and its presence in many dump-sites all over the world. Top soil samples collected from a dump site were analyzed for toxaphene residues. Analyses were performed by wall-coated open tubular column (WCOT) gas chromatography in tandem with electron capture negative ion mass spectrometry (HRGC-ECNI-MS). Since the concentration of toxaphene residues were at mg/kg levels, the application of a mass spectrometer as a substance-selective detector has been applied. Advantages of this mode of real-time acquisition in continuous repetitive scanning of mass spectra has significant advantages in comparison to the selected ion monitoring technique. An average RSD of 10% and recoveries of 90 to 109% were obtained. Levels down to 50 µg/kg are obtainable"--Abstract. Includes summaries and abstracts in English and French. gccst Soil gccst Insecticides gccst Chemistry Terry, K. A., author. Seech, Alan G. (Alan George), 1959- author. Antonic, M., author. Canada. Environment Canada. National Water Research Institute (Canada). Research and Applications Branch. GRACE Dearborn Inc.‏ Environmental/Engineering Group‏. National Water Research Institute (Canada) NWRI contribution ; no. 93-70. (CaOODSP)9.844121 PDF 1.65 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-93-70-eng.pdf