高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (10): 1570.

• 论文 • 上一篇    下一篇

乙基紫-脱氧核糖核酸共振发光体系的研究及其分析应用

李天剑, 沈含熙   

  1. 南开大学化学学院, 天津, 300071
  • 收稿日期:1998-03-10 出版日期:1998-10-24 发布日期:1998-10-24
  • 通讯作者: 沈含熙
  • 作者简介:李天剑,女,29岁,硕士研究生.
  • 基金资助:

    国家自然科学基金(批准号:29675009)资助课题.

Studies on the Resonant Luminescence Spectra of Ethyl Violet with Deoxyribonucleic Acid and Its Analytical Application

LI Tian-Jian, SHEN Han-Xi   

  1. College of Chemistry, Nankai University, Tianjin, 300071
  • Received:1998-03-10 Online:1998-10-24 Published:1998-10-24

摘要: 研究了碱性染料乙基紫与小牛胸腺脱氧核糖核酸(ctDNA)体系的结合反应及其共振发光光谱.在pH5.0~10.0范围内,乙基紫在595nm处有一特征吸收峰,加入DNA后,吸收峰消失,而在507nm处出现新的吸收峰,表明有新的结合物形成.在510nm处出现共振发光峰,其发光强度与DNA浓度呈线性关系,线性范围为0~500ng/mL;检出限(3σ)为1.54ng/mL.方法具有较高的灵敏度和准确度.将该体系用于核酸试样的测定,结果令人满意.

关键词: 乙基紫, 脱氧核糖核酸, 共振发光光谱

Abstract: The binding reaction and resonant luminescence spectra of ethyl violet with ctDNAhave been studied. In the pHrange of 5.0—10.0 ethyl violet exhibited a maximum of absorption at 595 nm. Anew absorption peak at 507 nm appeared when ctDNAwas added. It showed that a binding product of ethyl violet with DNAformed. The product emitted a sharp resonant luminescence peak at 510 nm. The intensity of resonant luminescence was found to be dependent on the concentration of DNA. The linear range of the calibration graph was 0—500 ng/mL. The limit of detection(3 σ) was 1.54 ng/mL. Anew method of resonant luminescence for the determination of trace DNAwas established with high sensitivity and selectivity.

Key words: Ethyl violet, Deoxyribo nucleic acid, Resonant luminescence spectrometry

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