Application of Q-ICP-MS for sensitive determination of lead isotope ratios in various organically based matrixes

Balabanova, Biljana and Ivanova, Violeta and Boev, Blazo (2017) Application of Q-ICP-MS for sensitive determination of lead isotope ratios in various organically based matrixes. In: 17th International Symposium and Summer School on Bioanalysis in CEEPUS CIII-RO-0010-11-1617 network for teaching and learning bioanalysis, 02-08 July 2017.

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Lead isotope measurements can provide useful information for routine means of “fingerprinting” the components grown in different habitats. 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. 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 and 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 local pollution sources. Being able to accurately measure all of the Pb
isotopes is important for a 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 wine and various plant 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. Also, the isotopic ratios were presented for samples from same and from different geographical region.

Item Type: Conference or Workshop Item (Poster)
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: 31 Aug 2017 10:30
Last Modified: 31 Aug 2017 10:30

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