Lead biomethylation, an elusive goal

Jarvie, A. W. P.; Whitmore, A. P.; Markall, R.N.; Potter, H.R.

doi:10.1016/0143-148x(83)90005-8

Cited by 17 publications

(4 citation statements)

References 17 publications

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“…Similarly this study shows that NaBEt4 reacts with Me3Pb+ (eq 5) and Me2Pb2+ (eq 6). Preliminary studies show that Me3Pb+ + NaBEt4 -* Me3EtPb (5) Me2Pb2+ + NaBEt4 -Me2Et2Pb (6) determination of MeHg+ in environmental samples is also feasible after derivatization by NaBEt4. The resulting MeEtHg (eq 7) can be quantified by GC or A AS.…”

Section: Resultsmentioning

confidence: 99%

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Speciation of lead and methyllead ions in water by chromatography/atomic absorption spectrometry after ethylation with sodium tetraethylborate

Rapsomanikis¹,

Donard²,

Weber³

1986

Anal. Chem.

197

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This paper describes a novel method for speciation and determination of Me3Pb+ and Me2Pb2+. The procedure Includes In situ ethylation by sodium tetraethylborate (NaBEt4) In water, purging and trapping of alkyllead molecules, and thermal desorption In an electrically heated quartz AAS furnace. The absolute detection limits of Pb for 50 cm3 are ca. 8.7 pg for Me3Pb+ (0.18 pg/cm3) and ca. 10.5 pg for Me2Pb2+ (0.21 pg/cm3). Major advantages for the technique are avoidance of solvent extraction and sample transfers because ethylation to Me3EtPb and Me2Et2Pb takes place In a closed system. Reaction conditions and apparatus operating parameters were optimized by a Simplex algorithm.

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Section: Resultsmentioning

confidence: 99%

“…Figure 3, Chromatogram of ethylated derivatives of Me3Pb+, Me2Pb2+, and Pb2+ (as pg Pb), (2) Me3EtPb (50 pg), (3) Me2Et2Pb (50 pg), and (5) Et4Pb (3000 pg).…”

Section: Methodsmentioning

confidence: 99%

Speciation of lead and methyllead ions in water by chromatography/atomic absorption spectrometry after ethylation with sodium tetraethylborate

Rapsomanikis¹,

Donard²,

Weber³

1986

Anal. Chem.

197

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“…The environmental methylation of alkyllead skits, whether biologically (25,26) or chemically (27,28) mediated, is now well established. However, the analogous methylation of inorganic lead cations remains controversial (29,30). Recently reported evidence, based on alkyllead concentrations in herring gulls, favored an environmental methylation of inorganic lead (23).…”

Section: Introductionmentioning

confidence: 99%

Ionic alkylleads in salt marsh periwinkles (Littorina irrorata)

Krishnan¹,

Marshall²,

Hatch³

1988

Environ. Sci. Technol.

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“…It has been demonstrated that alkyllead salts and inorganic lead salts may be methylated abiotically (9)(10)(11) or "biologically" by lake sediments or bacterial cultures (12)(13)(14). However, the biomethylation of Pb2+ remains controversial (15,16). In addition, several chemicals have been reported to catalyze the redistribution of alkyl groups between alkyllead compounds (17,18) or the disproportionation of trialkylleads to result in the tetraand dialkyllead homologues (9,13).…”

Section: Introductionmentioning

confidence: 99%