摘要
研究了用D3 0 1G大孔弱碱性苯乙烯系阴离子交换树脂对超痕量金的吸附性能。在φ为 1 %～ 2 0 %的王水介质中 ,Au与Cl-形成 [AuCl4]-络阴离子被D3 0 1G树脂吸附。吸附物灰化后 ,灰分与缓冲剂混合均匀 ,全部装入杯形电极进行光谱测定。方法检出限为 0 .0 8× 1 0 -9(1 0g样品 ) ,测定范围在 1～ 2 0 0 0 0ng内P -logC呈线性关系。方法经国家一级标准物质中金的测定验证 ,结果与标准值相符 ,1 2次测定的RSD为 9.1 %～ 1 3 .1 % ,可用于测定水系沉积物中的超痕量金。
In this paper, the adsorption property for the ultra trace gold by D301G anion resin (macropore alkalescence cinnamic series) was studied. In 1% to 20% aqua regia solution. The complex of - formed by gold and Cl - in the solution can be adsorbed on D301G resin. The resin is then ashed and the remains is mixed with buffer for emission spectroscopic analysis. The detection limit is 0.08×10 -9 (10?g of sample) for gold with detection range of 1.0×10 -9 to 20×10 -6 . The method has been applied to the determination of trace gold in the national standard samples. The results are in agreement with certified values with precision of 9.1% to 13.1% RSD ( n =12). The method can be used in the determination of ultra trace gold in stream sediment samples.
出处
《岩矿测试》
CAS
CSCD
北大核心
2002年第3期171-174,共4页
Rock and Mineral Analysis
基金
中国地质大调查项目 (2 0 0 0 2 0 190 112 )
国家重点基础研究课题 (G19990 43 2 12 )
