Lourdes Somoano-Blanco

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This work describes the first application of (37)Cl-labeled compounds to isotope dilution mass spectrometry (IDMS). The synthesis of 12 (37)Cl-labeled polychlorinated biphenyls (PCBs) was carried out by the chlorination of biphenyl with isotopically enriched chlorine gas, generated by the direct oxidation of Na(37)Cl with potassium peroxymonosulfate. After(More)
This work presents the comparison of four different mass spectrometric techniques coupled to gas chromatography (single quadrupole ICP-MS, triple quadrupole ICP-MS/MS, single quadrupole NCI-MS and triple quadrupole EI-MS/MS) for the detection of polychlorinated biphenyls (PCBs) in environmental samples and their determination by a new isotope dilution mass(More)
This work describes the synthesis, characterization and application of three (81)Br-labeled diastereosiomers of hexabromocyclododecane (HBCD) for the accurate and precise determination of α-, β- and γ-HBCD in water samples by isotope dilution mass spectrometry. The synthesis of the labeled analogs was carried out by bromination of cis, trans,(More)
Current procedures for the evaluation of spectral accuracy of mass spectrometers are limited by the lack of certified isotopic reference materials and the high uncertainty in the isotopic composition of natural abundance molecules. The calculated uncertainties in the ratio M + 1/M for natural abundance molecules containing any number of C, H, N and/or O(More)
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