Colorimetric sensing of atrazine in rice samples using cysteamine functionalized gold nanoparticles after solid phase extraction
Colorimetric sensing of atrazine in rice samples using cysteamine functionalized gold nanoparticles after solid phase extraction
复制标题
固相萃取后使用半胱胺功能化金纳米颗粒对大米样品中的莠去津进行比色传感
DOI：
10.1039/c5ay02810h
复制
发表时间：
2016-01-01
影响因子：
3.1
通讯作者：
Shao, Hua
中科院分区：
文献类型：
--
作者：
Liu, Guangyang;Wang, Shanshan;Shao, Hua
建立了固相萃取半蒸汽金纳米颗粒（AuNPs）测定水稻样品中阿特拉津的简便、灵敏比色法。该方法利用了基于半胱氨酸- aunps的快速灵敏比色传感策略的鲁棒样品预处理方案的优点。由于阿特拉津和半胱胺之间的氢键，半胱胺- aunp被诱导聚集，并伴随明显的颜色变化，从酒红色到蓝色。用紫外-可见分光光度法或肉眼监测颜色变化。523 nm处吸光度值的差异与阿特拉津浓度在0.033 ~ 6.67 μ g g（-1）范围内呈线性相关，检出限（S/ n_3）为0.0165 μ g g（-1）。用Oasis HLB筒对加标大米样品进行提取和纯化，回收率为83.23 ~ 91.65%。
A simple and sensitive colorimetric assay for the determination of atrazine in rice samples using cysteamine-gold nanoparticles (AuNPs) after solid phase extraction has been developed. The approach exploited the benefits of a robust sample pretreatment scheme with a rapid and sensitive colorimetric sensing strategy based on cysteamine-AuNPs. As a result of the hydrogen bonding between atrazine and cysteamine, cysteamine-AuNPs were induced to aggregate with an accompanying distinct color change from wine red to blue. The color change was monitored by UV-vis spectrophotometry or with the naked eye. The difference of the absorbance value at 523 nm was linearly related to the atrazine concentration over the range 0.033 to 6.67 mu g g(-1), and the limit of detection (S/N _ 3) was 0.0165 mu g g(-1). The spiked rice samples were extracted and purified using Oasis HLB cartridges and satisfactory recoveries (83.23-91.65%) were realized.