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本文提出一种测定地质样品和阳极泥中痕量金的方法,该法包括将金吸附在Amberlite XAD-16树脂上,洗脱后,再用FAAS法测定。同时,研究了HCl溶液中金氯络合物的吸附行为,在95％置信水平时,测得金的回收率为95.48±0.04％。对各种样品量的预富集程度在10～75倍范围内。金的检测限为0.046mg·L~(-1)。研究了XAD—16树脂对金的吸附等温线和吸附容量。发现吸附等温线为Langmuir型,树脂的吸附容量为0.55mmol·g~(-1)(108mg·g~(-1))。同时,估计了地质基体元素对吸附金的影响。用本法测定了阳极泥和参考标准矿石的含金量。
This paper presents a method for the determination of trace amounts of gold in geological samples and anode slime. This method involves adsorption of gold on Amberlite XAD-16 resin, followed by elution followed by FAAS. At the same time, the adsorption behavior of gold complexes in HCl solution was studied. The gold recovery was 95.48 ± 0.04% at 95% confidence level. Pre-enrichment of various sample sizes is in the range of 10-75 times. The detection limit of gold is 0.046mg · L -1. The adsorption isotherms and adsorption capacities of gold on XAD-16 resin were studied. The adsorption isotherm was found to be Langmuir type. The adsorption capacity of the resin was 0.55 mmol · g -1 (108 mg · g -1). At the same time, the influence of geological elements on the gold adsorption is estimated. This method was used to determine the gold content of anode slime and reference standard ore.