收稿日期: 2016-04-04
修回日期: 2016-12-27
网络出版日期: 2017-05-12
Discussion on the Optimum Conditions for Determination of Gold in Geological Samples by Atomic Absorption Spectrometry at High Altitude Area
Received date: 2016-04-04
Revised date: 2016-12-27
Online published: 2017-05-12
牟长贤 , 杨明荣 , 石爱萍 . 高海拔地区原子吸收法测定地质样品中金的最佳条件探讨[J]. 黄金科学技术, 2017 , 25(2) : 110 -115 . DOI: 10.11872/j.issn.1005-2518.2017.02.110
Aiming at the problems of low atmospheric pressure,low boiling point,low dissolution rate of gold,low release rate of the plastic foam containing gold in thiourea solution at high altitude area,the determination results of plateau and plain areas were compared under the same conditions,and the effect of aqua regia concentration on the dissolution rate of gold was discussed.At the same time,the main influence factors of the determination results were compared,such as two ore dissolving methods,foam adsorption temperature,release method of foam plastics.The optimum conditions for determining gold at high altitude area were obtained through many experiments.The method has been varified by determination of national standard reference material,and the results are consistent with the standard values.The precision of the method is 2.85% to 4.37% with RSD(n=6),and the detection limit is 0.03 μg/mL.The method is suitable for gold analysis in geological samples at high altitude,it solves the technical problem of the determination of gold under low pressure environment in plateau area.
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