【摘要】 在pH 2.87的B-R缓冲溶液中,氰戊菊酯与变色酸2R反应,在423nm波长处产生稍有增强而稳定的共振散射信号,而β-环糊精的加入进一步明显敏化该共振光散射信号,且散射强度与氰戊菊酯的质量浓度在0.02～0.50mg·L^-1范围内呈线性关系,其检出限（S/N=3）为0.016mg·L^-1。该方法用于地面水、果品及蔬菜等样品中氰戊菊酯的测定,测得回收率在86.0%～113.0%之间,测得结果的相对标准偏差（n=5）在1.6%～6.0%之间。更多还原

【Abstract】 It was found that in a B-R buffer solution of pH 2.87,intensity of the resonance scattering at 423 nm due to the reaction between fenvalerate（FVR）and chromotropic acid 2R（CTA 2R）was enhanced significantly by the presence ofβ-cyclodextrin（β-CD）,and that linear relationship between magnitude of intensity of the resonance scattering signal and concentration of FVR was obtained in the range of 0.02-0.50 mg·L^-1,with detection limit of 0.016 mg·L^-1.The proposed method has been applied to the determination of FVR in some samples of surface water,fruits and vegetable,giving values of recovery in the range of 86.0%—113.0%,and of RSD’s（n=）in the range 1.6%-6.0%.更多还原