作　　者： (陆美斌）; (王步军）;

机构地区： 中国农业科学院作物科学研究所、农业部谷物产品质量安全风险评估实验室（北京）,北京100081

出　　处： 《食品工业》 2017年第9期269-271,共3页

摘　　要： 采用HNO_3-H_2O_2混合体系作为氧化剂,分别利用湿法消解和微波消解两种方式进行前处理,通过ICPAES测定谷物中Ca,Mg,P,S,Fe,Cu,Mn和Zn 8种矿质元素。通过测定标准物质验证方法的准确度,进行重复性试验验证方法的精密度。在试验条件下,标准曲线线性良好,相关系数均大于0.999 9,线性范围在0~50 mg·L^(-1)不等。湿法消解方法定量限为0.233~15.000 mg·kg^(-1),RSD%≤3.0%;微波消解方法定量限为0.133~13.267 mg·kg^(-1),RSD%≤5.0%。标准物质测定结果均在标准值范围内,微波消解与湿法消解测定结果没有显著差异。 A mixed system with HNO2-H2O2 as an oxidant was used in microwave digestion and wet digestion to determine mineral elements including Ca, Mg, P, S, Fe, Cu, Mn and Zn in cereals by inductively coupled plasma atomic emission spectrometry （ICP-AES）. The accuracy of the method was practiced by the national standard material of grains, and the precision of the method was verified by recovery rate experiment. Under the experimental conditions, satisfactory linearity of the standard curve was obtained, giving elemental correlation coefficients were over 0.999 9. And the linear range was 0-50 mg＇L1, different elements had the different linear range. The quantitative limit of wet digestion method was in the range of 0.233-15.000 mg.kg1, the RSD% of the determination values was less than 3.0%; And the quantitative limit of microwave digestion method was in the range of 0.133-13.267 mg-kgl, the RSD% of the determination values was less than 5.0%. The results of standard substance determination were in the range of standard values, and there was no significant difference between the results of determination of microwave digestion and wet digestion method.

关 键 词： 湿法消解 微波消解 谷物 矿质元素