摘要
系统地试验了用感耦等离子体发射光谱同时测定原油中痕量元素Ｆｅ、Ｎｉ、Ｃｕ和Ｖ的多种前处理方法，制定出Ｈ２ＳＯ４、ＨＮＯ３分步炭化，５００℃灰化，ＨＣｌ＋ＨＮＯ３（ＶＨＣｌ∶ＶＨＮＯ３＝１∶１）溶解灰分的最佳分解方案。该方法的检出限为１．０～６．０μｇ／Ｌ，精密度好，ＲＳＤ（ｎ＝４）＜４．６％，加标回收率为９６．２％～１１１％。方法已应用于大庆、苏北、惠州等原油样品的分析。
The sample pre treatment methods for the determination of trace iron, nickel, copper and vanadium in crude petroleum by ICP AES were studied in this paper. The experimental results show that the method consisted of step charring with H 2SO 4 and HNO 3, followed by ashing at 500℃ and dissolving by mixed acid ( V HCl ∶ V HNO 3 =1∶1) can give the best results. The detection limits for these elements are in a range of 1.0～6.0 μg/L. The recoveries of standard additions are 96.2%～111% with precision of less than 4.6% RSD ( n =4). The method has been applied to the determination of trace Fe, Ni, Cu and V in crude petroleum from Daqing, Subei and Huizhou oil fields.
出处
《岩矿测试》
CAS
CSCD
北大核心
1999年第1期58-61,共4页
Rock and Mineral Analysis
关键词
原油
铁
镍
铜
钒
感耦等离子体发射光谱
crude petroleum, iron, nickel, copper, vanadium, inductively coupled plasma atomic emission spectrometry (ICP AES)
