火焰原子吸收光谱法测定不同产地大蒜中11种金属元素的含量

Determination of the Amount of 11 Metal Elements in the Allium Sativum L. from Different Regions by FAAS

为进一步利用和开发大蒜资源,采用V(硝酸)+V(高氯酸)=4+1常压微沸条件下消化,用火焰原子吸收法测定不同产地大蒜中的金属元素Na、Ca、Mg、Mn、Cu、K、Zn、Fe、Cr、Cd和Pb的含量。研究了不同元素的仪器最佳工作条件,并做了准确度和精密度的考察。结果表明,大蒜中Na、Ca、Mg、Mn、Cu、K、Zn、Fe、Cr、Cd和Pb的含量分别为236.49、1 598.21、612.44、6.27、15.48、12 172.41、126.88、64.46、1.67、1.75、2.02;172.84、1 243.38、610.05、5.32、13.60、11 689.65、120.07、78.91、1.75、2.04、1.97;136.90、1 467.93、574.16、6.27、16.90、12 263.45、146.34、116.20、1.82、2.17、2.25μg·g^(-1)。加标回收率为96.60%～105.80%,相对标准偏差(n=9)为:0.24%～4.81%,测定方法简单易行,方便快捷。

The objective of the present paper was to determine the amount of metal elements in the aAllium sativum L. from different regions by flame atomic absorption spectrophotometry （FAAS） , FAAS method was established for the determination of Na, Ca, Mg, Mn, Cu, K, Zn, Fe, Cr, Cd and Ph in the Allium Sativum L. The samples were incinerated and then digested with V（ HNO3 ） ＋ V （HC104） = 4 ＋ 1 and under normal pressure. In the meantime, the optimum parameters of FAAS and effects of solution medium on the results were studied, The analytical results of Na, Ca, Mg, Mn, Cu, K, Zn, Fe, Cr, Cd and Pb allium sativum L. from different habitats respectirely were 236. 49, 1598.21, 612.44, 6.27, 15.48, 12 172.41, 126.88, 64.46, 1.67, 1.75, 2.02; 172.84, 1243.38, 610.05, 5.32, 13.60, 11 689.65, 120.07, 78.91, 1.75, 2.04, 1.97; 136.90, 1467.93, 574.16, 6.27, 16.90, 12263.45, 146.34, 116.20, 1.82, 2.17, 2.25 μg·g^-1.The results showed that recovery of standard addition was 96. 60% - 105.80% , and the RSD （ n = 9） was 0.24%- 4. 81%. The characteristic method is quick, simple and convenient, and the results are satisfactory.