A Convenient ＂Turn On-off＂ Phosphorescent Nanosensor for Detection of Biotin Based on Quantum Dots/CTAB  

作　　者：FANG Xiaoxing ZHENG Ji YAN Guiqin 

机构地区：[1]School of Life Science, Shanxi Normal University, Linfen 041000, P. R. China

出　　处：《Chemical Research in Chinese Universities》2016年第6期917-923,共7页高等学校化学研究（英文版）

摘　　要：A switchable room-temperature phosphorescence（RTP） nanosensor based on an MPA-capped Mn-dopedZnS QDs/CTAB composite system（MPA=3-mercaptopropionic acid; CTAB=cetyltrimethyl ammonium bromide;QDs=quantum dots） was established for the detection of biotin. The phosphorescence intensity of QDs/CTAB couldbe regularly quenched with the increase of biotin. Under optimal conditions, this method yielded two linear ranges of2-20 μg/L and 20-140 μg/L with respective correlation coefficients of 0.993 and 0.990, as well as a detection limitof 0.93 μg/L. Therefore, the analytical potential of the proposed nanosensor was evaluated by detecting biotin inurine and biotin tablets. This approach yielded satisfactory results because of the effective elimination of backgroundfluorescence and light scattering from the sample matrix. This approach provides a practical method for biotin detec-tion.

关 键 词：BIOTIN NANOSENSOR Quantum dot Room-temperature PHOSPHORESCENCE 

分 类 号：O[理学]