olid phase extraction of mercury on sulfur loaded with N-(2-chloro enzoyl)-N′-phenylthiourea as a new adsorbent and determination by old vapor atomic absorption spectrometry

This paper reports sulfur powder loaded with N-(2-chloro benzoyl)-N′-phenylthiourea as a new solid phase extractor for determination of ultra trace amounts of mercury. The mercury ions were retained on a mini-column filled with the solid phase at a flow rate of 16mLmin−1. The retained Hg(II) ions were eluted with 3mol L−1 solution of HCl and measured by cold vapor atomic absorption spectrometry (CVAAS). The mercury vapors were generated by a homemade Reaction Cell-Gas Liquid Separator (RC-GLS).