精对苯二甲酸中苯甲酸、对羧基苯甲醛和对甲基苯甲酸含量的测定

Translated title of the contribution: Determination of contents of benzoic acid, 4-carboxy benzaldehyde and p-toluic acid in purified terephthalic acid

Minggong Li*, Shuying Wu, Yunsheng Ding

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

采用毛细管电泳法同时测定了精对苯二甲酸(PTA)中的苯甲酸(BA)、对羧基苯甲醛(4-CBA)和对甲基苯甲酸(p-TOL)的含量;考察了缓冲溶液的种类、缓冲溶液的pH、电泳时的电压、检测波长和进样时间对分离效率的影响。实验结果表明,选择3-(环己氨基)丙烷磺酸为缓冲溶液,在缓冲溶液的pH为10.0、电泳时的分离电压25kV、检测波长230nm、试样室温度25℃、进样压力25kPa、进样时间25s的条件下,PTA中BA,4-CBA,p-TOL的分离效果最佳,测定的结果准确。该方法具有精密度高、简单、快速和分离效率高等特点。

A new capillary electrophoresis method was adopted to determine the contents of benzoic acid (BA), 4-carboxy benzaldehyde (4-CBA) and p-toluic acid (p-TOL) in purified terephthalic acid (PTA). The effects of buffer solution type, buffer solution pH, determination voltage, detection wavelength, and sampling time on the separation efficiency were studied. BA, p-TOL and 4-CBA in PTA were separated completely and determined accurately. The capillary electrophoresis method was accurate, simple, rapid, and efficient for determination of contents of BA ,4-CBA and p-TOL in PTA.

Original languageChinese
Pages (from-to)518-521
Number of pages4
JournalPetrochemical Technology
Issue number5
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • 4-Carboxy benzaldehyde
  • Analysis
  • Benzoic acid
  • Capillary electrophoresis
  • p-Toluic acid
  • Purified terephthalic acid

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