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Determination of Selenium in Milk by ICP-OES  

김효중 ((주)한국야쿠르트 중앙연구소)
박종길 ((주)한국야쿠르트 중앙연구소)
신정걸 ((주)한국야쿠르트 중앙연구소)
백영진 ((주)한국야쿠르트 중앙연구소)
Publication Information
Food Science of Animal Resources / v.23, no.4, 2003 , pp. 356-360 More about this Journal
Abstract
The purpose of this paper was to determine the quantity of selenium in milk by inductively coupled plasma optical emission spectrometry. The sample was digested in teflon vessel containing nitric-hydrogen peroxide acid mixture. After digestion, the sample is treated with additional hydrochloric acid. Total selenium was reduced with sodium borohydride and concentrated hydrochloric acid in a simplified hydride generation(HG) manifold. The optimum conditions of HG are 2 M for HCl, 1.5％ for NaBH$_4$, 1.2 mL/mim for sample flow. Recovery rates by the standard addition method were 88.0％ at 10 ppb and 92.2％ at 10 ppm. The relative standard deviations were 4.8 and 3.2％, respectively. This method showed a good accuracy and precision. And so it was highly suitable for determination of small quantity of selenium in milk.
Keywords
selenium; ICP; milk; hydride generation;
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