겨울 심포지움
2018겨울초록
발표자 및 발표 내용
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주저자
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공동저자
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접수자
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The purpose of this study is to produce the monitoring data on contents of heavy metals in nattos. The samples which were purchased from Korean markets were analyzed for evaluating the contents of heavy metals (Pb, Cd, As and Hg). In this study, the analysis was conducted about heavy metal contents of natto which is a traditional Japanese food made from soybeans fermented with Bacillus subtilis var. natto.
The samples were digested by microwave digestion system. In this study, the analysis for Pb, Cd and As was performed by using Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and contents of Hg was analyzed by Direct Mercury Analyzer (DMA).
Linearity, LOD (limit of detection), LOQ (limit of quantitation), accuracy and precision for the analysis validation, through FAPAS (International Quality Control) was verified.
As a result, LOD was 0.00001 ~ 0.0033 mg/kg and LOQ was 0.00012 ~ 0.0109 mg/kg. Also, RSD was less than 5 %. Accuracy was 94.8 ~ 108.2% and precision was 0.14 ~ 4.30 %. FAPAS Satisfactory results were obtained below the Z-score 1.0, ensure high reliability of the analyses.
The list of natto in the sequence of decreasing Hg, Cd, Pb, As (heavy metal concentration of natto is lower than soybeans except for Hg).
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