Abstract
A method based on solvent extraction and inductively coupled plasma emission spectrometry (icpes) is described. It was useful in the simultaneous determination of trace elements. The pH dependence of the extractability of 55 ions with a mixture of ammonium tetramethylenedithiocarbamate(APDC) and hexamethyleneammonium hexamethylenedithiocarbamate(HMAHMDC) into xylene was studied systematically. The percentage extraction of each ion at the optimum pH range was also examined. 27 ions proved to be extractable simultaneously by a single extraction. To simplify the procedures and to lower the contamination from the preconcentration steps, xylene is directly introduced into the plasma without back-extraction, and is subsequently analyzed by icpes. Advantages of this method include rapidity, multi-element capability, and high detection capability. The detection limits for 29 elements are also reported. The present method was successfully applied to the analysis of NBS-SRM 1571, Orchard Leaves.
