Determination of Trace Silver in Polymetallic Ore Samples by Flame Atomic Absorption Spectrometry after Solid-Phase Extraction Using a Microcolumn Comprising Eggshell Membrane

作者: Xianzhong Cheng , Kun Shao , Shangyue Shen , Shenghong Hu , Haiou Qiu

DOI: 10.1111/J.1751-908X.2011.00101.X

关键词:

摘要: A rapid and inexpensive method was developed for the determination of trace silver in polymetallic ore samples by use eggshell membrane (ESM), a natural biomaterial, as solid-phase extraction (SPE) adsorbent coupled with flame atomic absorption spectrometry (FAAS). The ESM used separation/pre-concentration silver, parameters affecting sensitivity, such pH, sample flow rate, eluent volume were carefully investigated. found to be an effective solid phase extractant adsorption over wide range acidity from 0.02 0.50 mol l−1 HNO3. solution 0.4 mol l−1 HNO3 pumped through microcolumn at rate 1.0 ml min−1. Silver absorbed, then eluted 1.0% m/v thiourea–0.5% v/v HCl. Under these optimal conditions, exhibited good enrichment efficiency dynamic capacity 1.7 mg g−1. proposed applied FAAS ores geological reference materials, GSO-2, 3 5, GSD-11, GSD-12, determined values agreement certified values. Une methode rapide et peu couteuse ete developpe pour la de l’argent en dans des echantillons minerai polymetallique. Elle utilise une coquille d’œuf un biomateriau naturel, comme adsorbant d’extraction solide couplee spectrometrie d’absorption atomique flamme L’ESM separation/preconcentration d’argent, les parametres affectant sensibilite, le debit l’echantillon, l’eluant, ont eteetudies avec soin. Il est montre que l’ESM efficace traces sur large gamme d’acidite L’echantillon pompea travers microcolonne vitesse L’argent absorbe, puis elute thiouree 0.5% Dans ces conditions optimales, bonne efficacite d’enrichissement capacite d’adsorption dynamique 1.7 mg g−1. La proposee appliquee par technique minerais polymetalliques materiaux geologiques reference: GSD-12. Les valeurs determinees sont bon accord certifiees.

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