Liquid chromatography — Particle beam mass spectrometry for identification of unknown pollutants in water

Particle Beam Liquid Chromatography/Mass Spectrometry Analysis of Hazardous Agricultural and Industrial Chemicals

“…Ions monitored in SIM mode were m/z 248 (M + ), 187, 161 and 160. These findings are similar to those reported earlier by Miles et al and Bagheri et al 14,15 Similar LC work was carried out on a pesticide concentrate, taken by HSE inspectors during enforcement action. The PB-LC/MS results obtained for this concentrate are shown in Fig.…”

The role of column liquid chromatography-mass spectrometry in environmental trace-level analysis. Determination and identification of pesticides in water

“…This was convincingly shown for organophosphorus pesticides, carbamates and their TPs [42], triazines and phenylureas [43,44] and chlorinated phenoxy acids [45,46]. One case has been reported in which the LC-based introduction of the analytes, phenoxy acid herbicides, caused a reduction of the spectral quality due to thermal decomposition [46], while Honing et al [47] noted similar phenomena for carbamates.…”

“…The role of LC -PB-MS for the identity confirmation of a compound was demonstrated when SPE -LC -DAD UV seemed to indicate a massive contamination of river water by bentazone, with subsequent PB-based experiments unambiguously showing the observed peak to be due to 2,4-dichlorobenzoic acid instead [52]. To quote some further examples, on-line LC -PB-MS has also been used to identify carbamazepine [52], 3,4-dichloroaniline, N-(3,4-dichlorophenyl)-N-methylurea [53], atrazine [25] and isoproturon [7] in river water, and bromacil in drinking water [54, Figure 6]. It is, in our opinion, the dedicated confirmation rather than a wide-ranging screening role for which today's PB interfaces are best suited.…”

Identification of Carbamates by Particle Beam/Mass Spectrometry

“…The sensitivity of detection was successfully enhanced by the application of on-line trace enrichment. 26 The problem of non-linearity has not yet been overcome, although co-elution of analytes and a "carrier compoundÏ has been reported to provide a remedy in some cases (see, e.g., Refs 27 and 28).…”