海藻酸钠-[C16mim]Br体系共振光散射法测定离子液体[C16mim]Br
Resonance Scattering Spectrometric Determination of Ionic Liquid [C16mim]Br by Its Reaction with Sodium Alginate
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76.7 μg·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.
海藻酸钠
[C16mim]Br离子液体
水样
Resonance scattering spectrometry
Sodium alginate
Ionic liquid [C16mim]Br
Water sample
Abstract
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.
中图分类号 O657.32
所属栏目 试验与研究
基金项目 浙江省自然科学基金资助项目(Y4080252)
收稿日期 2009/7/8
修改稿日期
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备注路齐英(1981-),女,山东济宁人,硕士研究生,研究方向为有机分析.
引用该论文: LU Qi-ying,ZENG Yan-bo,WANG Wei-juan,XIAO Ying,LI Lei. Resonance Scattering Spectrometric Determination of Ionic Liquid [C16mim]Br by Its Reaction with Sodium Alginate[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(9): 993～995
路齐英,曾延波,王伟娟,肖莹,李蕾. 海藻酸钠-[C16mim]Br体系共振光散射法测定离子液体[C16mim]Br[J]. 理化检验－化学分册, 2010, 46(9): 993～995
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