A rapid method for the detection of humic acid based on the poly(thymine)-templated copper nanoparticles  

作　　者：Changbei Ma Mingjian Chen Haisheng Liu Kefeng Wu Hailun He Kemin Wang 

机构地区：[1]State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University [2]State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University

出　　处：《Chinese Chemical Letters》2018年第1期136-138,共3页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos. 21205142, 31370104);the Research Innovation Program for Graduates of Central South University (Nos. 2016zzts580, 2017zzts347)

摘　　要：This work described a new method for the detection of humic acid （HA） based on the poly（thymine） （polyT）-templated copper nanoparticles （CuNPs）. Without the presence of HA, the formation of poly T- templated CuNPs could take place, resulting in strong fluorescence emission peaks at 610 nm （upon excitation at 340 nm）. On the other hand, when HA was present, strong interaction between HA and Cu2＋ took place, which then hampered the effective formation of fluorescent CuNPs, leading to the decrease in fluorescence intensity. Furthermore, under the optimal experimental conditions, the method exhibited a high specificity to HA with a detection limit of 0.4 mg/L. This work has demonstrated a low-cost and convenient method that could be accomplished within 10 min. The method could provide a simple, rapid, and sensitive fluorescent olatform for the detection of HA.This work described a new method for the detection of humic acid （HA） based on the poly（thymine） （polyT）-templated copper nanoparticles （CuNPs）. Without the presence of HA, the formation of poly T- templated CuNPs could take place, resulting in strong fluorescence emission peaks at 610 nm （upon excitation at 340 nm）. On the other hand, when HA was present, strong interaction between HA and Cu2＋ took place, which then hampered the effective formation of fluorescent CuNPs, leading to the decrease in fluorescence intensity. Furthermore, under the optimal experimental conditions, the method exhibited a high specificity to HA with a detection limit of 0.4 mg/L. This work has demonstrated a low-cost and convenient method that could be accomplished within 10 min. The method could provide a simple, rapid, and sensitive fluorescent olatform for the detection of HA.

关 键 词：Label-freeHumic acidFluorescenceCopper nanoparticleCost-effective 

分 类 号：O6[理学—化学]