Determination of 42 Trace Elements in Seawater by Inductively Coupled Plasma Mass Spectrometry After APDC Chelate Co‐precipitation Combined With Iron

Abstract

A method was developed for seawater analysis by inductively coupled plasma‐mass spectrometry. To a seawater sample with 1 mg Fe, 2 ml 1% ammonium pyrrolidinedithiocarbamate was added at pH 2 or pH 4 for coprecipitation of Co, Ni, Cu, Nb, Mo, Cd, Sn, In, Te, and Pb or Be, Sc, Ti, Cr, V, Co, Ni, Cu, Zn, Ga, Ge, As, Zr, Nb, Sn, In, Te, rare earth elements, Hf, Ta, W, Tl, Pb, Bi, and Th. The procedural recovery and reproducibility are ∼96% and ∼4.4%, respectively. This method was validated with seawater references, and the results were consistent with their certified values.

Keywords:

• Trace multi‐element
• Fe‐PDC coprecipitation; seawater
• inductively coupled plasma‐mass spectrometry

Acknowledgments

This study was financially supported by a NSFC grant (40676070) from National Natural Science Foundation of China to YS. Experimental support of Key Lab of Isotope and Chronology, Chinese Academy of Sciences to this study is gratefully acknowledged. Help from Kouping Chen and Xianglin Tu is also very much appreciated.