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Position: Home > Articles > Detection of Lead Residues in Vegetables by Dithizone Method Journal of Anhui Agricultural Sciences 2016,44 (14) 109-110

双硫腙法测定蔬菜中铅残留的研究

作  者:
徐守霞;王斌
单  位:
宿迁学院三系;宿迁高等师范学校生物系
关键词:
双硫腙;分光光度法;二价铅离子
摘  要:
[目的]研究蔬菜中残留二价铅离子的测定,为蔬菜中重金属离子的测定提供参考。[方法]用双硫腙分光光度法研究了二价铅离子的吸收波长、显色时间、p H以及显色剂的量等对测定蔬菜中铅残留的影响,优化了试验条件。[结果]试验表明,在波长510 nm处、络合显色3 min、p H为8.5等条件下,二价铅离子含量在1~5μg的范围内与吸光度呈现良好的线性关系,其检出限为2.17×10~(-6)mg/m L。[结论]用双硫腙分光光度法测定二价铅离子可应用于实际蔬菜样品的检测。
译  名:
Detection of Lead Residues in Vegetables by Dithizone Method
作  者:
XU Shou-xia;WANG Bin;Department of Biology,Suqian Higher Normal School;The Third Department of Suqian College;
关键词:
Dithizone;;Spectrophotometry;;Divalent lead ion
摘  要:
[Objective] To detect the divalent lead ion residues in vegetable,and to provide references for the detection of heavy metal ion in vegetable. [Method]Dithizone spectrophotometry method was used to research the influence of the absorption wavelength,color reaction time,p H,color reagent dosage. And the experimental conditions were optimized. [Result] When the divalent lead ion content was in the range of1- 5 g,it had good linear relationship with absorbancy under the conditions of 510 nm,3 min complex coloring time and p H 8. 5. The detection limit was 2. 17 × 10~(- 6)mg / m L. [Conclusion] Detecting divalent lead ion by dithizone spectrophotometry method can be applied to the determination of actual samples of vegetables.

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