Sodium tetra( n-propyl)borate: a novel aqueous in situ derivatization reagent for the simultaneous determination of organomercury, -lead and -tin compounds with capillary gas chromatography–inductively coupled plasma mass spectrometry

The versatility of sodium tetra( n-propyl)borate, NaBPr 4, as aqueous in situ derivatization reagent for organometallic compounds is demonstrated. With this new derivatization reagent it is now possible to derivatize the important ethyl derivatives of lead and mercury which until now had to be deriv...

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Bibliographic Details
Published in:	Journal of Chromatography A Vol. 793; no. 1; pp. 99 - 106
Main Authors:	De Smaele, Tom, Moens, Luc, Dams, Richard, Sandra, Pat, Van der Eycken, Johan, Vandyck, Jos
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 09-01-1998 Elsevier
Subjects:	Analysis methods Analytical chemistry Applied sciences Chemistry Chromatographic methods and physical methods associated with chromatography Exact sciences and technology Gas chromatographic methods Organolead compounds Organomercury compounds Organotin compounds Pollution Sodium tetra( n-propyl)borate Soil and sediments pollution Organotin compounds Organolead compounds Sodium tetra( n-propyl)borate Organomercury compounds Derivatization, GC Marine sediments Chemical analysis Coupled method Derivatization Soil pollution Inductive coupling plasma spectrometry Alkylation Heavy metal Gas chromatography Organic plumbane Boron Organic compounds Mercury Organic compounds Lead Organic compounds Tin Organic compounds Mass spectrometry Speciation Organic stannane
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Summary:	The versatility of sodium tetra( n-propyl)borate, NaBPr 4, as aqueous in situ derivatization reagent for organometallic compounds is demonstrated. With this new derivatization reagent it is now possible to derivatize the important ethyl derivatives of lead and mercury which until now had to be derivatized by Grignard alkylation or hydride generation. The synthesis of NaBPr 4 is described in detail. Derivatization parameters such as pH, reaction time, amount of reagent and stability of the aqueous NaBPr 4 solution were investigated. Different organometallic compounds of tin, mercury and lead were simultaneously determined by an inductively coupled plasma mass spectrometer coupled to the capillary GC system using a laboratory-developed interface. Good linearity was obtained for all components with detection limits in the ng/l range (without preconcentration). The reproducibility of the complete procedure, i.e. derivatization, extraction and injection, is better than 10% R.S.D. The analysis of the PACS-1 Reference Material after derivatization with NaBPr 4 showed the accuracy of this method.
ISSN:	0021-9673
DOI:	10.1016/S0021-9673(97)00886-8