Characterization of lead isotope ratios in various plant foods and beverages with application of Q-ICP-MS

Balabanova, Biljana and Ivanova, Violeta and Mitrev, Sasa (2018) Characterization of lead isotope ratios in various plant foods and beverages with application of Q-ICP-MS. In: 1st International Meeting Agriscience & Practice (ASP 2018).

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Studies of the isotopic composition of lead are commonly used in the environmental science. If lead is present in the soil, a plant will take up small amounts and subsequent isotope ratio studies might provide unique means of differentiating between different plant sources of origin. Among all the naturally occurring lead isotopes, only 204Pb is nonradiogenic, whereas, 206Pb, 207Pb and 208Pb are the daughter products of the radioactive decay of 238U and 235U and 232Th, respectively. Small Pb isotope abundance variation occurs in nature and the isotopic composition of lead in the environment is dependent on local pollution sources. Being able to accurately measure all of the Pb isotopes is very important for the number of investigations. Quadropole inductively coupled plasma with mass spectrometry (Q-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 organically based matrix samples. Very good sensitivity was obtained for 206Pb, 207Pb and 208Pb isotopes, while, 204Pb suffers from isobaric interference from 204Hg. Satisfactory linearity (R) was obtained in the range from 5 to 100 μg/L. The study summarizes the instrument optimization procedure for Pb isotope measurements in plant food and wine samples. The calculated isotope ratios ranges: a) 207Pb/206Pb: from 0.985 to 1.122 with standard deviation of data distribution of 0.038 and b) 208Pb/206Pb: from 2.221 to 2.998 with standard deviation of data distribution 0.21. The isotopic ratios were presented for samples from the same and different geographical regions.

Item Type: Conference or Workshop Item (Speech)
Subjects: Natural sciences > Chemical sciences
Natural sciences > Earth and related environmental sciences
Agricultural Sciences > Other agricultural sciences
Divisions: Faculty of Agriculture
Depositing User: Biljana Balabanova
Date Deposited: 12 Oct 2018 10:09
Last Modified: 12 Oct 2018 10:09

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