岩石土壤中痕量金泡塑富集光谱测定

Spectroscophic Determination of Trace Gold in Rocks and Soils with Polyurethane Foam

关于泡塑对金的捕集特性研究,1976年国内已用于金的测定,而泡塑富集光谱测定微量金的方法,作者已有报导[1]。分析实践表明:从0.01—65.0克/吨的范围内方法是可靠的。几年来,由于方法的不断完善,1克/吨金样的测定相对标准偏差由最初的18.5%下降至11.8%。

98.1%of Au in 10%aqua regia medium is adsorbed by polyfoam in kinetic state.After ignition of the foam,the ash is subjected to spectrographic determination.Beer’s law is obeyed for 5-1000g of gold.The C.V.of samples containing 1.3-27.2ppb of Au are 24.4-25.4%(n=11).The detection limit of gold is 2g.