泡沫塑料动态吸附-火焰原子吸收光谱法测定金

Determination of Au by Polyurethane Foam Active Absorption and Enrichment-Flame Atomic Absorption Spectrometry

建立了泡沫塑料动态吸附富集-直接火焰原子吸收法测定矿物样品中金的含量.样品经室温升至650℃焙烧后,保温1.5 h,经王水溶解后,用泡沫塑料动态吸附,实现溶解液中的金富集到泡沫塑料上,再将泡沫塑料灰化后的王水溶解液,直接用火焰原子吸收法测定其中金的含量。具有快捷、简单,重现性好、线性关系范围宽等优点,特别适用于地质部门大批量样品的分析测定。检出限为0.04μg/g,精密度小于3%,测试结果准确可靠,具有应用前景。

A new method was built for determination of Au in mineral samples by foam active adsorption and en- richment - directly flame atomic adsorption spectroscopy. The mineral samples were toasted from the room temperature to 650℃, and staying 1.5 h, then, were been absorbed and enriched with foam active foam after dissolved by aqua regia. Au in solutions originated from dissolved foam that absorbed Au by aqua regia again, was directly detected by flame atomic adsorption spectrometry. The characteristics of this method are shortcut, simple, good reproduction qual- ity, broad linear relative. The detection limit of this method is 0.04 ng/g with the precision （RSD, n = 12） of 〈 3%. Which indicated this method had credibility and application prospect, especially for large mounts of samples de- tection in field of geology.