原子吸收光谱法测定新疆不同居群大蒜中微量元素的含量

采用湿法消解处理大蒜样品,用原子吸收光谱法对新疆不同居群大蒜中Ca,Fe,Zn,Mg,Cu,Mn,Cr,Pb和Cd共九种微量元素的含量进行了测定,并进行了加标州收率实验.结果表明:不同居群大蒜中上述微量元素标准曲线的相关系数在0.994 4～0.999 8之间,呈现良好的线性关系;样晶测定结果的相对标准偏差(RSD)均不超过5.15%,各元素的加标回收率在99.4%～101.7%之间,测定结果准确可靠;新疆地产大蒜中对人体有益的微量元素含量较为丰富,不同样品中微量元素含量的差异一定程度上反映了南北疆之间地形地貌、气候、土壤、水文等环境要素的差异.

Determination of trace elements in garlic from Xinjiang different groups by AAS

In the present paper, the contents of Ca, Fe, Zn, Mg, Cu, Mn, Cr, Pb and Cd in garlic which comes from different groups of Xinjiang were measured by wet digestion and flame-atomic absorption spectrometry. And the standard addition recovery experiment was done. The results of recovery experiment show that the atomic absorption spectrometry is a quick and easy method for determining; The correlation coefficient of each standard curve was between 0.9944 and 0.9998, with good linear relationship; The relative standard deviation (RSD) of each result is less than 5.15%, the recovery rate of each sample was between 99.4% and 101.7%, and the determination results are correct and reliable. The results show that the beneficial elements are richer in the garlic of Xinjiang, and the contents of trace elements are different among different places. To some extent, the difference in contents reflects the difference in the topography, climate, soil, hydrology and other environmental factor between the south and the north of Xinjiang.