CAJ | 학술논문

以马铃薯为原料，采用湿法消解处理样品，用石墨炉原子吸收法测定马铃薯中铅、镉等微量元素的含量。通过对混酸体系、混酸比例、消解时间等单因素的控制，确立最佳单因素水平，并通过正交试验，最终确立最佳湿法消解条件。正交试验结果表明，铅的最佳消解条件为HNO3-HCLO4比例为6∶1，消解时间为6 h；镉的最佳消解条件为HNO3-HClO4比例为4∶1，消解时间为4 h。在最优化条件下，该方法加标回收率在98.00%~101.3%之间，精密度在0.2248%~1.2346%之间。该方法简单、快捷，能够满足食品中污染物铅、镉的分析要求。
이마령서위원료，채용습법소해처리양품，용석묵로원자흡수법측정마령서중연、력등미량원소적함량。통과대혼산체계、혼산비례、소해시간등단인소적공제，학립최가단인소수평，병통과정교시험，최종학립최가습법소해조건。정교시험결과표명，연적최가소해조건위HNO3-HCLO4비례위6∶1，소해시간위6 h；력적최가소해조건위HNO3-HClO4비례위4∶1，소해시간위4 h。재최우화조건하，해방법가표회수솔재98.00%~101.3%지간，정밀도재0.2248%~1.2346%지간。해방법간단、쾌첩，능구만족식품중오염물연、력적분석요구。
This test was to analyze the sample of potato , by means of wet digestion and to determine the content of the two trace elements,such as lead and cadmium in the method of graphite furnace atomic absorption spectrometry.By controlling the three factors of mixed acid system ,mixed acid ratios and digestive time ,we choosed the best single factor,and then in orde to receive the best condition of wet digestion, we plan to do the orthogonal experimention.Considering the three factors of mixed acid system ,mixed acid ratios and digestive time ,we carried out orthogonal experimention using the table of L9.The result showed that the best condtion for lead was HNO3-HCLO4 that the acid ratios is 6 ∶ 1,and the best digestive time was 6 h,as for cadmium the mixed acid system was HNO3-HCLO4 which is 4 ∶ 1, and the best digestive time was 4h.Under the optimal conditions,we reached out the conclusion is that the average recoveries of three spkiked levels including high , medium and low concentrations were between 98.00%to 101.3%,and the precision varied from 0.224 8%-1.234 6 %.The proposed method was accurate and high efficient ,and could meet the analysis of lead and cadmium in contaminated foods.