Isotopic lead measurements in wine and edible oil using inductively coupled plasma with mass spectrometry
Abstract
Lead isotope ratios provide analytical information related to the source of lead contamination in naturally occurring samples. On the other hand, these measurements can provide useful information for routine means of “fingerprinting” the components grown in different habitats. Studies of the isotopic composition of lead are therefore commonly used in the environmental science as well as geological and anthropological studies. Among all the naturally occurring lead isotopes, only 204Pb is non-radiogenic, whereas, 206Pb, 207Pb and 208Pb are the daughter products from the radioactive decay of 238U, 235U and 232Th, respectively. As a consequence, small Pb isotope abundance variation occurs in nature and the isotopic composition of lead in the environment is dependent on the local pollution sources. Being able to accurately measure all of the Pb isotopes is important for a number of investigations. In this study, inductively coupled plasma with mass spectrometry (ICP-MS) was used to investigate whether this chemical application can offer a reliable and practical solution to the problem of the polyatomic overlap in the presence of organic based matrix samples. The study summarizes the instrument optimization procedure for Pb isotope measurements in wine and edible oil samples. Also, the isotopic ratios were presented for samples from same and from different geographical region.References
Prego, R., Cobelo-Garcıa, A. (2004). Cadmium, copper and lead contamination of the seawater column on the Prestige shipwreck (NE Atlantic Ocean). Analytica Chimica Acta, 524(1), 23-26.
Spiro, B., Weiss, D. J., Purvis, O. W., Mikhailova, I., Williamson, B. J., Coles, B. J., Udachin, V. (2004). Lead isotopes in lichen transplants around a Cu smelter in Russia determined by MC-ICP-MS reveal transient records of multiple sources. Environmental Science & Technology, 38(24), 6522-6528.
Ndung'u, K., Hibdon, S., Véron, A., Flegal, A. R. (2011). Lead isotopes reveal different sources of lead in balsamic and other vinegars. Science of the Total Environment, 409(14), 2754-2760.
MacKenzie, A. B., Pulford, I. D. (2002). Investigation of contaminant metal dispersal from a disused mine site at Tyndrum, Scotland, using concentration gradients and stable Pb isotope ratios. Applied Geochemistry, 17(8), 1093-1103.
Krachler, M., Le Roux, G., Kober, B., Shotyk, W. (2004). Optimising accuracy and precision of lead isotope measurement (206 Pb, 207 Pb, 208 Pb) in acid digests of peat with ICP-SMS using individual mass discrimination correction. Journal of Analytical Atomic Spectrometry, 19(3), 354-361.
Marguí, E., Iglesias, M., Queralt, I., Hidalgo, M. (2006). Lead isotope ratio measurements by ICP-QMS to identify metal accumulation in vegetation specimens growing in mining environments. Science of the Total Environment,367(2), 988-998.
Lee, K., Do Hur, S., Hou, S., Burn-Nunes, L. J., Hong, S., Barbante, C., Rosman, K. J. (2011). Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800years. Science of the Total Environment, 412, 194-202.
Barling, J., Weis, D. (2012). An isotopic perspective on mass bias and matrix effects in multi-collector inductively-coupled-plasma mass spectrometry. Journal of Analytical Atomic Spectrometry, 27(4), 653-662.
Taylor, R. N., Ishizuka, O., Michalik, A., Milton, J. A., & Croudace, I. W. (2015). Evaluating the precision of Pb isotope measurement by mass spectrometry. Journal of Analytical Atomic Spectrometry, 30(1), 198-213.
Liu, Y., Hu, Z., Zong, K., Gao, C., Gao, S., Xu, J., Chen, H. (2010). Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS. Chinese Science Bulletin, 55(15), 1535-1546.
Ivanova, V., Balabanova, B., Mitrev, S., Dimovska, V., Gulaboski, R., Stafilov, T. (2015). Optimization and validation of a microwave digestion method for analysis of elements in wine using ICP-MS. Food Analytical Methods, in press.
