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ISSN : 1225-4517(Print)
ISSN : 2287-3503(Online)
Journal of Environmental Science International Vol.28 No.11 pp.1041-1045

Evaluation of Homogeneity and Stability of Korean Mussel (Mytilus coruscus) Standards for Cadmium Analysis

Ha-Eun Lee,Jangho Lee,David Chung,Soo Yong Lee,Ki-Wan Park,Kyu-Young Shim


In this study, the KS A ISO Guide 35 was applied to develop analytical standards for heavy metal cadmium using the Korean mussel (Mytilus coruscus) and to evaluate the homogeneity and stability of the sample. Some of the crucial characteristics that reference materials must consist include homogeneity and stability of both intra- and inter-bottles. We tested homogeneity using ANOVA analysis and short-term stability using regression analysis. The variations of cadmium concentrations did not significantly differ between intra- and inter-bottles (F=0.41, p=0.90). For short-term stability verification, cadmium analysis results were not statistically significant as a result of the regression analysis (significance F=0.51, p=0.53). This suggests that we can not dismiss the null hypothesis that there is no significant variation in concentrations of cadmium over time. These results indicated that the cryogenic-milling process has statistically proven the short-term stability for materials from mussels in the chemical analysis of cadmium. Therefore, we propose that the Korean mussel’s reference material developed for the proficiency test could be used as a tool to evaluate reliability and consistency in laboratories.

카드뮴 분석용 홍합(Mytilus coruscus) 표준물질의 균질성 및 안정성 시험평가