Titre du document / Document title

Determination of mercury in SRM crude oils and refined products by isotope dilution cold vapor ICP-MS using closed-system combustion

Auteur(s) / Author(s)

KELLY W. Robert ⁽¹⁾ ; LONG Stephen E. ⁽¹⁾ ; MANN Jacqueline L. ⁽²⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Maryland 20899 Gaithersburg, ETATS-UNIS
⁽²⁾ Department of Geology, University of Maryland, College Park, Maryland 20742, ETATS-UNIS

Résumé / Abstract

Mercury was determined by isotope dilution cold-vapor inductively coupled plasma mass spectrometry (ID-CV-ICP-MS) in four different liquid petroleum SRMs. Samples of approximately 0.3 g were spiked with stable ²⁰¹ Hg and wet ashed in a closed system (Carius tube) using 6 g of high-purity nitric acid. Three different types of commercial oils were measured: two Texas crude oils, SRM 2721 (41.7±5.7 pg g^-1) and SRM2722 (129±13 pg g^-1), a low-sulfur diesel fuel, SRM 2724b (34±26 pg g^-1), and a low-sulfur residual fuel oil, SRM 1619b (3.5±0.74 ng g^-1) (mean value and 95% CI). The Hg values for the crude oils and the diesel fuel are the lowest values ever reported for these matrices. The method detection limit, which is ultimately limited by method blank uncertainty, is approximately 10 pg g^-1 for a 0.3 g sample. Accurate Hg measurements in petroleum products are needed to assess the contribution to the global Hg cycle and may be needed in the near future to comply with reporting regulations for toxic elements.

Revue / Journal Title

Analytical and bioanalytical chemistry   ISSN 1618-2642 

Source / Source

2003, vol. 376, n^o5, pp. 753-758 [6 page(s) (article)] (20 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (2002) (Revue)

Mots-clés anglais / English Keywords

Mass spectrometry ; Isotope dilution ; Diesel fuel ; Mercury ; Chemical composition ; Crude oil ;

Mots-clés français / French Keywords

Spectrométrie masse ; Dilution isotopique ; Carburant diesel ; Mercure ; Composition chimique ; Pétrole brut ;

Mots-clés espagnols / Spanish Keywords

Espectrometría masa ; Dilución isotópica ; Carburante diesel ; Mercurio ; Composición química ; Petróleo bruto ;

Localisation / Location

INIST-CNRS, Cote INIST : 853, 35400011994960.0290