Screening of antifouling pesticides in sea water samples at low ppt levelsby GC-MS and LC-MS

Citation
L. Piedra et al., Screening of antifouling pesticides in sea water samples at low ppt levelsby GC-MS and LC-MS, CHROMATOGR, 52(9-10), 2000, pp. 631-638
Citations number
22
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
CHROMATOGRAPHIA
ISSN journal
00095893 → ACNP
Volume
52
Issue
9-10
Year of publication
2000
Pages
631 - 638
Database
ISI
SICI code
0009-5893(200011)52:9-10<631:SOAPIS>2.0.ZU;2-Q
Abstract
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. Detect ion was carried out following selected analytical procedures (GC-MS in El a nd 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 s pite 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 c oncentrations vp to 0.9 and 0.8 <mu>g L-1 respectively.