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为了测定超痕量金,我们置聚胺酯型圆条状泡沫塑料80毫克于漏斗颈部,试样溶液以2.5ml·分~(-1)速度流经泡沫塑料富集,辅以发射光谱法完成测定,检测限为0.6ppb,同一照相板上单次测定相对标准偏差为8.1%。方法简便,稳定可靠,可用于地质土壤和其他领域内1～100ppb金的测定。一泡沫塑料用量及溶液流速溶液流经置于漏斗颈中的泡沫塑料,富集金的效果较泡沫塑料置于溶液中振荡为佳。但金被吸附的量与泡沫塑料的长度和溶液的流速有关。1μg金以1.25～2.5ml·分~(-1)的流速流经直径8毫米,长4厘米(约80毫克)的圆条状泡沫塑料,吸附回收率可达95%
In order to determine the ultra-trace gold, we set the urethane-based round bar-shaped foam 80 mg in the neck of the funnel, the sample solution at 2.5ml · min -1 speed through the foam enrichment, complemented by emission spectroscopy Determination, detection limit of 0.6ppb, the same photographic plate single determination of relative standard deviation of 8.1%. The method is simple, stable and reliable, and can be used for the determination of 1 to 100 ppb gold in geological soil and other fields. A foam amount and the solution flow rate The solution flows through the funnel placed in the neck of the foam, gold-rich foam solution placed in the oscillation better. However, the amount of gold adsorbed is related to the length of the foam and the flow rate of the solution. 1 μg gold was passed through a circular strip of 8 mm in diameter and 4 cm long (about 80 mg) at a flow rate of 1.25-2.5 ml · min -1 with an adsorption recovery of 95%