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A Study on the Factors Causing Analytical Errors through the Estimation of Uncertainty for Cadmium and Lead Analysis in Tomato Paste
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 Title & Authors
A Study on the Factors Causing Analytical Errors through the Estimation of Uncertainty for Cadmium and Lead Analysis in Tomato Paste
Kim, Ji-Young; Kim, Young-Jun; Yoo, Ji-Hyock; Lee, Ji-Ho; Kim, Min-Ji; Kang, Dae-Won; Im, Geon-Jae; Hong, Moo-Ki; Shin, Young-Jae; Kim, Won-Il;
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 Abstract
BACKGROUND: This study aimed to estimate the measurement uncertainty associated with determination of cadmium and lead from tomato paste by ICP/MS. The sources of measurement uncertainty (i.e. sample weight, final volume, standard weight, purity, molecular weight, working standard solution, calibration curve, recovery and repeatability) in associated with the analysis of cadmium and lead were evaluated. METHODS AND RESULTS: The guide to the expression of uncertainty was used for the GUM (Guide to the expression of Uncertainty in Measurement) and Draft EURACHEM/CITAC (EURACHEM: A network of organization for analytical chemistry in Europe/Co-Operation on International Traceability in Analytical Chemistry) Guide with mathematical calculation and statistical analysis. The uncertainty components were evaluated by either Type A or Type B methods and the combined standard uncertainty were calculated by statistical analysis using several factors. Expected uncertainty of cadmium and lead was mg/kg (k=2.09) and mg/kg (k=2.16), on basis of 95% confidence of Certified Reference Material (CRM) which was within certification range of mg/kg for cadmium (k=2.03) and mg/kg for lead (k=2.01), respectively. CONCLUSION(s): The most influential components in the uncertainty of heavy metals analysis were confirmed as recovery, standard calibration curve and standard solution were identified as the most influential components causing uncertainty of heavy metal analysis. Therefore, more careful consideration is required in these steps to reduce uncertainty of heavy metals analysis in tomato paste.
 Keywords
Cadmium;Lead;Measurement;Uncertainty;Tomato paste;
 Language
Korean
 Cited by
1.
우리나라 농경지 중금속 동태 및 작물흡수 연구동향,이지호;김지영;고우리;정은정;;정구복;김두호;김원일;

한국환경농학회지, 2012. vol.31. 1, pp.75-95 crossref(new window)
2.
LC-MS/MS를 이용한 곡류가공품의 제랄레논 분석과 측정불확도 추정,최은정;강성태;정소영;신재민;장민수;이상미;김정헌;채영주;

한국식품과학회지, 2012. vol.44. 6, pp.658-665 crossref(new window)
1.
Analysis and Uncertainty Estimation of Zearalenone in Cereal-Based Products by LC-MS/MS, Korean Journal of Food Science and Technology, 2012, 44, 6, 658  crossref(new windwow)
2.
Current research trends for heavy metals of agricultural soils and crop uptake in Korea, Korean Journal of Environmental Agriculture, 2012, 31, 1, 75  crossref(new windwow)
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