中文摘要：本文开发了一个快速检测蔬菜中有机磷乙酯农药残留的单频关断光学探针，检测结果显示，该探针可有效检测加标蔬菜叶中的有机磷乙酯农药残留，平均检测限为0.22μM，动态线性范围达到5.8mm.
 
外文摘要：The utilisation of pesticides has become more intensified as to fulfil
the demand of *food* for the ever-growing world population. It leads to
the risk of pesticides residues leaching to the environment, which
subsequently reflects to the needs of having effective and economical
detection and monitoring approach. In view of this, a work has been
performed as reported in this paper on the development of a simple and
economical single-shot optical probe for the detection of paraoxon-ethyl
pesticide on real *vegetable* samples. The probe adopted carbon dots as
sensing receptor that has been synthesised in-house via simple acid
carbonisation of sucrose. The carbon dots isolated showed strong yellow
fluorescence with the maximum emission at 524nm when excited at 423 nm.
Upon edition with paraoxon-ethyl, the emission was quenched accordingly
with concentration dependent manner. The sensing protocol was optimised
and validated, while the analytical characteristic was evaluated as an
effective single-shot probe that can detect paraoxon-ethyl extracted
from spiked *vegetable* leaves. The probe has achieved a limit of
detection (LOD) of 0.22 +/- 0.02 mu M and a dynamic linear range up to
5.80 mM. (C) 2016 Elsevier B.V. All rights reserved.
 

 
 
外文关键词：Nanoparticles, Sensing, Quenching, Fluorescence, Pesticide, Food safety
作者：Chang, Melissa May Fung; Ginjom, Irine Runnie; Ng, Sing Muk
作者单位：Swinburne Univ Technol, Fac Engn Comp & Sci, Sarawak Campus Jalan Simpang Tiga, Kuching 93350, Sarawak, Malaysia.
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL
期刊影响因子：4.758
出版年份：2017
出版刊次：4
点击下载：单频关断光学探针及其在采用荧光碳点快速检测蔬菜中有机磷乙酯农药中的应用