2008•Rock and Mineral AnalysisRequires access

Determinations of Micro-amount of Silver in Geochemical Exploration Samples by Graphite Furnace Atomic Absorption Spectrometry in Thiourea Medium

Huang Ren-zhong

Abstract

The micro-amount of Ag in geochemical exploration samples is determined by graphite furnace atomic absorption spectrometry in 10 g/L of thiourea medium.The detection limit of the method for Ag is 0.058 ng/mL and the recovery of the method is 94%～105% with precision of 0.8%～5.4% RSD(n=6).The method has been verified by the determination of Ag in the National Standard Reference Materials and the results are in agreement with the certified values.

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Key concepts: Thiourea, Graphite furnace atomic absorption, Detection limit, Graphite, Certified reference materials, Atomic absorption spectroscopy, Mass spectrometry, Analytical Chemistry (journal)