CAJ | 학술논문

建立了一种快速检测蔬菜中毒死蜱残留量的比色方法。该方法基于镧（III）功能化纳米金与含氧酸根的配位，加入毒死蜱引起功能化的金纳米粒子发生聚集，使溶液出现红色到蓝色的变化，可以通过用肉眼观察颜色或者用紫外分光光度法检测其吸光度的变化来检测毒死蜱的含量。毒死蜱浓度在5×10-10 mol/L~5×10-7 mol/L范围内，呈良好的线性关系，检出限为0.1 nmol/L（S/N=3）。该方法操作简单、成本低、比色明显，可用于蔬菜中毒死蜱残留的现场检测。
건립료일충쾌속검측소채중독사비잔류량적비색방법。해방법기우란（III）공능화납미금여함양산근적배위，가입독사비인기공능화적금납미입자발생취집，사용액출현홍색도람색적변화，가이통과용육안관찰안색혹자용자외분광광도법검측기흡광도적변화래검측독사비적함량。독사비농도재5×10-10 mol/L~5×10-7 mol/L범위내，정량호적선성관계，검출한위0.1 nmol/L（S/N=3）。해방법조작간단、성본저、비색명현，가용우소채중독사비잔류적현장검측。
A gold nanoparticles-based colorimetric assay for rapid detection of chlorpyrifos in vegetable was developed. Based on the coordination effect of the oxygen-containing groups and lanthanum (III) functionalized gold nanoparticles, chlorpyrifos could induce the aggregation of lanthanum functionalized gold nanoparticles, thereby resulting in red-to-blue color change. So the concentration of chlorpyrifos could be determined by monitoring with the naked eye or a UV-vis spectrometer. The absorption difference of the assay exhibited a linear correlation to chlorpyrifos concentration in the range from 5 ×10-10 mol/L to 5 ×10-7 mol/L with a limit of detection of 0.1 nmol/L (S/N=3). The merits (such as simplicity, low cost and visual colorimetry) make the proposed method for on-site screening of chlorpyrifos in vegetable.