辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2008, Vol. 28 ›› Issue (3): 23-25.

• 石油化工 • 上一篇    下一篇

铬天青S分光光度法测定原油中微量铜

沈春玉   

  1. 辽宁石油化工大学石油化工学院,辽宁抚顺 113001
  • 收稿日期:2007-05-29 出版日期:2008-09-20 发布日期:2017-07-24

Spectrophotometric Determination the Micro-Copper in Crude Oil With CAS as a Colored Indicator

SHEN Chun-yu   

  1. School of Petrochemical Engineering, Liaoning University of Petroleum & Chemical Technology,  Fushun Liaoning 113001, P.R.China
  • Received:2007-05-29 Published:2008-09-20 Online:2017-07-24

摘要: 以铬天青S为显色剂,用分光光度法测定原油中的微量铜,并考察了样品灰化条件和测定条件。在650 ℃将样品灰化4.5 h以上条件下,用HNO3溶液溶解灰分中的铜,使干扰离子与铜分离。在波长610 nm、表观摩尔吸光系数ε=8.32×104 L/(mol•cm),其线性范围为0~8 μg,合成样回收率98.04 %,原油测定结果的相对标准偏差4.11%,结果表明,该方法准确、简便、不需分离、灵敏度高。

关键词: 铬天青, 铜, 原油, 分光光度法

Abstract: The determination of micro-cooper in crude oil samples by spectrophotometer with chrome azurol S(CAS) as a colored indicator has been developed. The cineration of samples and measuring conditions were studied. After samples burning to ashes at 650 ℃ for at least 4.5 h, Cu in the ash was dissolute by HNO3 solution to separate interference ions. The molar absorption coefficient ε610 nm is 8.32×104 L/(mol•cm). The linear range is between 0~8 μg. The recovery rate of the artificial synthetic sample is 98.04%, and the actual crude oil was analyzed with RSD of the results 4.11%. This method offers the advantages such as good accuracy, ease of operation, no need for separation and high sensitivity. 

Key words: CAS, Copper, Crude oil, Spectrophotometry

引用本文

沈春玉. 铬天青S分光光度法测定原油中微量铜[J]. 辽宁石油化工大学学报, 2008, 28(3): 23-25.

SHEN Chun-yu. Spectrophotometric Determination the Micro-Copper in Crude Oil With CAS as a Colored Indicator[J]. Journal of Liaoning Petrochemical University, 2008, 28(3): 23-25.

使用本文

0
    /   /   推荐

导出引用管理器 EndNote|Ris|BibTeX

链接本文: http://journal.lnpu.edu.cn/CN/

               http://journal.lnpu.edu.cn/CN/Y2008/V28/I3/23