直接稀释进样-电感耦合等离子体原子发射光谱法同时测定原油中20种元素

ICP-AES Determination of 20 Elements in Crude Oil with Direct Sample Introduction after Dilution

摘要: 原油样品(2.0 g)用稀释剂航空煤油稀释至20.0 g后,直接进样供电感耦合等离子体原子发射光谱法测定其中银、铝、硼、钡、钙、镉、铬、铜、铁、镁、锰、钼、钠、镍、铅、硅、锡、钛、钒和锌等20种元素的含量。在优化的试验条件下,20种元素的检出限(3S/N)在0.1~3 mg·kg-1之间。方法用于分析原油样品,所得测定值的相对标准偏差(n=6)在1.24%~6.23%之间,回收率在80%~105%之间。

Abstract: 2.0 grams of sample of crude oil was diluted to 20.0 g with aviation kerosene and introduced directly into the instrument for ICP-AES determination of the contents of 20 elements, including Ag, Al, B, Ba, Ca, Cd, Cr, Cu, Fe, Mg, Mn, Mo, Na, Ni, Pb, Si, Sn, Ti, V and Zn in the sample. Under the optimized conditions, values of detection limit (3S/N) of the elements found were in the range of 0.1-3 mg·kg-1. The proposed method was applied to the analysis of crude oil, giving values of recovery found by standard addition method in the range of 80%-105%, with RSD′s (n=6) in the range of 1.24%-6.23%.