The operational parameters of an atomizer with a graphite filter-insert and a Pd-Mg matrix modifier are optimized for direct electrothermal atomic absorption determination of lead in some wines and associated materials. A method is proposed for eliminating interferences from mineral and organic components, as well as from nonatomic absorption, and for increasing the detection sensitivity for the element by up to a factor of two. The lower limit for determining the amount of lead in wines is 0.0025 mg/dm3. The relative standard deviation (S r) does not exceed 10%.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 79, No. 6, pp. 953–958, November–December, 2012.
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Zacharia, A.N., Zhuravlev, A.S., Chebotarev, A.N. et al. Direct determination of lead in wine materials by atomic absorption spectrometry using an electrothermal atomizer with a graphite filter-insert. J Appl Spectrosc 79, 949–954 (2013). https://doi.org/10.1007/s10812-013-9708-5
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DOI: https://doi.org/10.1007/s10812-013-9708-5