CAJ | 학술논문

目的：通过对测定食品中汞元素的实验过程质量控制,提高实验结果的准确性。方法采用不同的前处理以及测定方法对多种标准物质中的汞含量进行测定并对比,观察在不同存放条件下汞测定结果的差异。结果电感耦合等离子质谱法与原子荧光光谱法测定汞检出限(LOQ)分别为0.06μg/L与0.15μg/L；相关系数(r)均≥0.9990,相对标准偏差 RSD 分别为4.9%及4.1%；湿式消解、微波消解及高压罐消解处理GBW10048-芹菜结果均落在标准值的可信范围内,微波消解及高压罐消解较湿法消解有更好的精密度；电感耦合等离子质谱法测定6种国家标准物质结果均落在标准值的可信范围内,而原子荧光光谱法除了对汞含量较低的 GBW10018-鸡肉及 GBW10043-辽宁大米测定出现偏差外,其余结果均落在标准值可信范围内。结论通过对实验过程进行严格的质量控制及采取恰当措施,将有助于提高测定痕量汞的准确度。
목적：통과대측정식품중홍원소적실험과정질량공제,제고실험결과적준학성。방법채용불동적전처리이급측정방법대다충표준물질중적홍함량진행측정병대비,관찰재불동존방조건하홍측정결과적차이。결과전감우합등리자질보법여원자형광광보법측정홍검출한(LOQ)분별위0.06μg/L여0.15μg/L；상관계수(r)균≥0.9990,상대표준편차 RSD 분별위4.9%급4.1%；습식소해、미파소해급고압관소해처리GBW10048-근채결과균락재표준치적가신범위내,미파소해급고압관소해교습법소해유경호적정밀도；전감우합등리자질보법측정6충국가표준물질결과균락재표준치적가신범위내,이원자형광광보법제료대홍함량교저적 GBW10018-계육급 GBW10043-료녕대미측정출현편차외,기여결과균락재표준치가신범위내。결론통과대실험과정진행엄격적질량공제급채취흡당조시,장유조우제고측정흔량홍적준학도。
Objective To improve the accuracy of experimental results by means of quality control of the determination of mercury in food.Methods A comparison was made after the determination of mercury in multiple standard substance with different pretreatment and assay methods. The difference in the storage condi-tions of determination results of mercury was also found.ResultsThe LOQs of mercury determined by ICP-MS and AFS were 0.06μg/L and 0.15μg/L, respectively. The correlation coefficients were both≥0.9990. The RSDs were 4.9% and 4.1%, respectively. The results of GBW10048 with three pretreatment methods were found to be within tolerable limits. However, the results made by microwave digestion and high pressure digestion had a better precision. The results of 6 kinds of standard substances determined by ICP-MS were all in the scope of standard values. While, the results determined by AFS were also in the scope of standard values except GBW10018 and GBW10043 with low mercury contents.Conclusion It will contribute to advance the accuracy of trace mercury determinations via strict quality control and appropriate measure.