摘要
在pH 5.0的B-R缓冲介质中,海藻酸钠能与[C16mim]Br离子液体形成离子缔合体系,使[C16mim]Br的共振散射增强。体系在最大散射波长392 nm处,[C16mim]Br的质量浓度在1.9-12.0 mg·L^-1范围内与共振散射增强强度（ΔI）呈线性关系,检出限（3s/k）为76.7μg·L^-1。据此提出了一种简单而快速测定[C16mim]Br的方法,应用于测定水样中[C16mim]Br,测得回收率在97.8%-102.3%之间,相对标准偏差（n=6）在1.87%-3.01%之间。
In a B-R buffer medium of pH 5.0,enhancement of intensity of resonance scattering of the reaction between ionic liquid [C16mim]Br and sodium alginate was observed.The magnitude of increase in resonance Rayleigh scattering intensity（ΔI） was found to keep linear relationship with the mass concentration of [C16mim]Br in the range of 1.9-12.0 mg·L^-1 when measured at 392 nm（the maximum scattering wavelength of the reaction system）.Detection limit（3s/k） of the method was found to be 76.7 μg·L^-1.Based on these facts,a simple and rapid method for determination of [C16mim]Br was proposed.In its application to analysis of water samples for their [C16mim]Br contents,values of recovery and RSD′s（n=6） found were in the ranges of 97.8%-102.3% and 1.87%-3.01%,respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2010年第9期993-995,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
浙江省自然科学基金资助项目(Y4080252)
