Colorimetric detection of dihydrogen phosphate based on deoxycholic acid modified silver nanoparticles

doi:10.16085/j.issn.1000-6613.2017.01.036

Abstract

Abstract: It is of extensive interest in developing a simple,selective,sensitive and rapid approach for anions sensing,as anions play a significant role in biological systems and environment. A simple and sensitive detection method based on the deoxycholic acid modified silver nanoparticles has been developed for the determination of H₂PO₄^- in aqueous solution. The deoxycholic acid modified silver nanoparticles were synthesized by reduction method with sodium borohydride. The research indicates that those Ag NPs allowH₂PO₄^- to be visually detected with high selectivity because of the hydrogen bonding interaction between H₂PO₄^- and the ligand. Moreover,the assay method showed a linear response range of 6×10^-7-6×10^-6mol/L for H₂PO₄^- with colorimetric detection limit being 7×10^-7 mol/L,which allows the method to be applied for the colorimetric detection of H₂PO₄^-.

Key words: nanoparticles, deoxycholic acid, colorimetric detection, silver, selectivity

摘要： 阴离子在生命科学和环境科学等领域发挥重要的作用，建立快速、高效的阴离子检测方法越来越被关注。本文基于脱氧胆酸修饰的银纳米探针建立一种简便快速检测H₂PO₄^-的比色方法。采用硼氢化钠还原法合成脱氧胆酸修饰的银纳米粒，将该银纳米粒用于对阴离子的比色检测。结果表明，通过银纳米粒表面的配体脱氧胆酸与H₂PO₄^-之间较强的氢键作用，H₂PO₄^-诱导银纳米粒颜色的改变，HPO₄^2-等其他阴离子并未发生明显变化，从而实现对H₂PO₄^-高选择性的比色识别。该脱氧胆酸修饰的银纳米粒探针检测H₂PO₄^-的线性范围为6×10^-7~6×10^-6mol/L，比色检测限为7×10^-7mol/L，可以在水溶液中实现对H₂PO₄^-的检测。

关键词: 纳米粒子, 脱氧胆酸, 比色检测, 银, 选择性

CLC Number:

O648

ZHAN Junyan, CUI Jianguo, HUANG Yanmin, GAN Chunfang, LIU Zhiping. Colorimetric detection of dihydrogen phosphate based on deoxycholic acid modified silver nanoparticles[J]. Chemical Industry and Engineering Progree, 2017, 36(01): 289-293.

展军颜, 崔建国, 黄燕敏, 甘春芳, 刘志平. 脱氧胆酸修饰的银纳米粒子比色法检测H₂PO₄^-[J]. 化工进展, 2017, 36(01): 289-293.

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