文献类型：期刊文献

中文题名：分光光度法测定原油中的钙含量

英文题名：Determination of Calcium Content in Crude Oil by Spectrophotometric Method

作者：贺提昌[1];徐心茹[1];杨敬一[1];张蓓蕾[1]

机构：[1]华东理工大学石油加工研究所,上海200237

年份：2010

卷号：36

期号：3

起止页码：406

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：原油;钙;分光光度法;酸性铬蓝K;双波长

外文关键词：crude oil; calcium; spectrophotometry; ACBK; dual-wavelength

摘要：分别采用酸性铬蓝K(ACBK)双波长法和三溴偶氮胂(TB-ASA)法测定原油中的钙含量。结果表明:镁离子的干扰影响了用TB-ASA法测定钙含量的精度,而ACBK法采用双波长原理消除了镁离子的干扰,其最佳条件为:组合波长528、541 nm,缓冲溶液的pH为10.5,显色时间30 min,显色剂为3 mLw=0.000 5的ACBK溶液。在此条件下,钙离子的标准曲线为c=446.07ΔA+0.123 9,R2=0.999。ACBK双波长测试方法与电感耦合等离子体发射光谱法(ICP-AES)比较,其测定结果与ICP-AES的结果一致,ACBK双波长法具有操作简单及准确度好的特点。
Two spectrophotometric methods ACBK and TB-ASA were developed for the determination of calcium content in crude oil.The results show that the existence of magnesium ion decreases the precision of measurements for TB-ASA method,while the disturbance of magnesium ion can be eliminated by ACBK method due to the dualwavelength spectrophotometery.The optimal conditions include the dual-wave length of 528 nm and 541 nm,pH of buffer solution of 10.5,color time of 30 min,and a color agent of 3 mL ACBK solution（w = 0.000 5）.The regression equation is c = 446.07ΔA ＋ 0.123 9 with R^2 = 0.999 for ACBK spectrophotometery.Compared with the inductively coupled plasma atomic emission spectrometry（ICP-AES） method,the ACBK dual-wavelength method is more simple and precise while similar results are obtained.