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1623877 
Journal Article 
Determination of organic phosphonates in aqueous samples using liquid chromatography/particle-beam mass spectrometry 
Klinger, J; Sacher, F; Brauch, HJ; Maier, D 
1997 
Yes 
Acta Hydrochimica et Hydrobiologica
ISSN: 0323-4320
EISSN: 1521-401X 
Wiley-VCH Verlag 
25 
2 (1997) 
79-86 
English 
WOS:000079681200003 
A method for the determination of trace levels of organic phosphonates in water is described, based on evaporative preconcentration followed by extraction and methylation of phosphonates using diazomethane. The analysis of the completely methylated derivatives was performed using liquid chromatography with an isopropyl alcohol /n-hexane gradient, coupled to a particle-beam interface mass spectrometer. The electron impact mass spectra for several methylated derivatives of a range of organic phosphonic acids obtained from the Monsanto and Bayer AG chemical companies are reproduced and the details of the mass spectra and the optimization of the derivatization procedures are described. Detection limits were below those of other methods and ranged from 1-10 ug per litre for different starting materials. 
organic phosphonates; derivatization; diazomethane; liquid chromatography; particle-beam interface; mass spectrometry; water analysis