Journal
CHROMATOGRAPHIA
Volume 52, Issue 9-10, Pages 631-638Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/BF02789763
Keywords
gas chromatography-mass spectrometry; liquid chromotography-mass spectrometry; biocides; antifouling paints; marinas
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Studies of various analytical procedures for simultaneous determination of antifouling pesticides in sea water, based on SPE followed by GC-MS and IC-MS, have been mode. The main characteristics of these compounds in GO-MS in both positive and negative modes and in LC-ES-MS were studied. Extraction of the compounds from filtered water was performed off-line with different SPE adsorbents using graphitized carbon (Envi-carb) and polymer cartridges (Isolute ENV+ and Oasis HLB) by passing 600 mL samples through them. Detection was carried out following selected analytical procedures (GC-MS in El and NCI modes) and LC-ES-MS (positive mode). Recoveries ranged from 80 - 95% except for dichlofluanid and Sea-nine 211 where they were 40 and 46%. In spite of this, the low coefficients of variation (< 11%) obtained, were low enough to consider these recoveries adequately. Limits of detection were at low part-per-trillon levels in all cases. Finally a six-month pilot study was carried out at various marinas in the South-East of Spain. Irgarol 1051 and diuron were revealed as the major antifouling agents in this area at concentrations vp to 0.9 and 0.8 g L-1 respectively.
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