分光光度法测定聚烯烃树脂和原油中的铝

辽宁石油化工大学学报 ›› 2006, Vol. 26 ›› Issue (2): 12-14.

分光光度法测定聚烯烃树脂和原油中的铝

沈春玉, 刘立行

辽宁石油化工大学石油化工学院, 辽宁抚顺113001

收稿日期:2006-01-05 出版日期:2006-02-25 发布日期:2006-02-25
作者简介:沈春玉(1952 -), 男, 辽宁沈阳市, 高级工程师。

Spectrophotometric Determination of Aluminum in Polypropylene Resin and Crude Oil

School of Petrochemical Technology , Liaoning University of Petroleum & Chemical Technology ,
Fushun Liaoning 113001, P .R .China

Received:2006-01-05 Published:2006-02-25 Online:2006-02-25

摘要/Abstract

摘要： 　以铬天青S(CAS)为显色剂, 采用三元络合物胶束增容分光光度法测定聚烯烃及原油中的微量铝。详细考察了样品的灰化条件和测定条件。在700 ℃将样品灰化4 h 以上, 通过加入掩蔽剂来掩蔽干扰离子。结果表明, 在660 nm 波长处的线性相关系数为0.998 6 , 摩尔吸光系数为7 .93×10⁴L/(mol·cm)。铝质量浓度的线性范围为0～ 0 .32 mg/ L。人工合成样的平均回收率为96 .88%。对实际样品进行分析, 相对标准偏差为2 .04 %～ 3 .06%,加标平均回收率为96 .73%～ 98.29 %.

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关键词: 　分光光度法, 　铬天青S , 　铝, 　聚丙烯树脂

Abstract:

　 Chromazurine S was used as colored indicator chromomeric agent to determine micro aluminum in polypropylene resin and crude oil with complexes micellar spectro photometer .The measuring conditions and ashing conditions were studied.Through adding masking agent to mask interfering ions, after samples was burned to ashes at 700 ℃ for at least 4 h .The results show that the molar absorption coefficient is 7.93 ×104 L/(mol·cm)and the linear correlation is 0 .998 6 at 660nm wave length.The linear range of aluminum mass concentration is 0 ～ 0 .32 mg/ L.The average recovery rate of the artificial synthetic sample is 96 .88 %.The real samples were analyzed.The analytical result of relative standard variation is 2.04 %～ 3.06 %.The average recovery rate is 96.73 %～ 98 .29 %

Key words: 　Spectrophotometer , 　Chromazurine S , 　Aluminum , 　Polypropy lene resin

沈春玉, 刘立行. 分光光度法测定聚烯烃树脂和原油中的铝[J]. 辽宁石油化工大学学报, 2006, 26(2): 12-14.

SHEN Chun -yu,LIU Li -x ing. Spectrophotometric Determination of Aluminum in Polypropylene Resin and Crude Oil[J]. Journal of Liaoning Petrochemical University, 2006, 26(2): 12-14.

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