建水酸石榴产地土壤中几种重金属含量的测定

Determination of Several Kinds of Heavy Metals in Soil of Jianshui Acid Megranate Producing Area

[目的]为改良建水酸石榴的栽培条件、扩大栽培面积提供参考。[方法]在建水酸石榴的3个产地采集土样，检测了Pb、Zn、Fe、Cd、Cr、Cu的含量。[结果]原子吸收分光光度法的平均相关系数≥0．99950；测定元素的相对标准差为0．07％～1．67％，平均为0．6225％；不同金属元素的样品回收率在98．7％～116．4％。不同酸石榴种植地的各种元素含量差异明显，基地Ⅲ的Pb、Zn、Cd、Cr、Cu含量最高，分别为160．7086、28．0227、10．2634、169．3933、83．4718mg／kg。基地Ⅰ的Fe含量最高，为7828．8554mg／kg。基地Ⅱ的Pb、Zn、Fe、Cd、Cu含量最低，分别为118．7567、21．7829、2938．4863、6．5298、68．0998mg／kg；而基地Ⅰ的Cr含量最低，为59．0595mg／kg；同一地块的铁元素含量最高，Cd含量最少。[结论]基地3重金属含量较高，基地Ⅰ的含量较低。

[ Objective ] The study was to provide the reference to improve the cultivation condition of Jianshui acid megranate and to enlarge its cultivation area. [ Method] Soil examples in 3 producing bases of Jianshui acid megranate producing area were collected to determine the content of Pb, Zn, Fe, Cd, Cr, Cu. [ Result] The average correlation coefficient of atomic absorption spectrophotometry ≥0. 999 50. The relative standard deviation of determined element was 0.07% - 1.67%, and it was 0. 622 5% in average. The example recovery of different elements was from 98.7% to 116.4%. The element content in different producing areas had obviously difference. The Pb, Zn, Cd, Cr, Cu content in base Ⅲ was the highest, being 160. 708 6, 28. 022 7, 10. 263 4, 169. 393 3, 83. 471 8 mg/kg resp. and the Fe content in base Ⅰ was the highest, being 7 828.855 4 mg/kg. The Pb, Zn, Fe, Cd, Cu content of in base Ⅱ was the lowest, being 118.756 7, 21.782 9, 2 938. 486 3, 6. 529 8, 68. 099 8 mg/kg resp. and the Cr content in base Ⅰ was the lowest, being 59. 059 5 mg/kg. In the same soil, the Fe content was the highest and Cd content was the lowest. [ Conclusion] The content of heavy mental in base 3 was higher and that in base Ⅰ was lower,