Development of Facile and Rapid Method for Determination of Ultra trace Amount of Heavy Metal Ions in Soil Aiming at Secure Society

本研究旨在建立一种简便、快速测定土壤中镉、铅等可交换性重金属离子的方法。在第一步中，由于对Cd和Pb的络合能力，以噻吩环芳烃为萃取剂，将浸出过程从6 h加快到10 min。这一步之后，用硫代氨基脲配体进行定量配体替换，得到的配体然后进行动态分化模式HPLC，以便在不受土壤基质干扰的情况下，在ppb水平上高度选择性和敏感地检测可交换的Cd和Pb。

This study was aimed at developing a facile and rapid method to determine exchangeable heavy metal ions such as Cd and Pb in soil. In the first step, thiacalix[4] arene was utilized as the extractant to accelerate the leaching processes from 6 h to only 10 min, owing to the complexation ability toward Cd and Pb. This step was followed by quantitative ligand replacement with the thiosemicarbazone ligand, the resulting complex of which was then subjected to kinetic differentiation mode HPLC to enable highly selective and sensitive detection of exchangeable Cd and Pb at the ppb levels without interference from soil matrices.