摘要
在十二烷基苯磺酸钠(SDBS)胶束体系中,通过检测AgNO3沉淀I-生成稳定的AgI胶体所产生的共振光散射(RLS)增强信号,从而建立了I-的灵敏分析法。RLS光谱在437 nm处,具有特征散射峰,且增强的共振光散射强度(△IRLS)与I-溶液的浓度在一定范围内呈线性关系,其检出限为2.6 ng/mL。本实验中研究了AgNO3溶液浓度、SDBS溶液浓度以及共存物质对RLS强度的影响。此方法用于合成样的测定,其回收率在99.3%～106.7%之间,RSD小于2.8%。
In the sodium dodecyl benzene sulfonate （SDBS） micellar system, a sensitive method for the determination of I-was established based on detecting the enhanced resonance light scattering （RLS） signals produced by steady AgI colloid resulting from the interaction of AgN03 with I^-. RLS spectrum is characterized by a scattering peak at 437 nm. The enhanced RLS intensities（Aims） were in linear proportion to the concentrations of I- in a certain range and the determination limit for I- is 2.6 ng/mL. The effects of the concentration of AgNO3, the concentration of SDBS and foreign substances on the determination of I-were investigated. The method was used for the determination of trace amount iodine in synthetic samples, with the recovery being 99.3%-106.7% and a RSD less than 2.8%.
出处
《重庆教育学院学报》
2008年第3期17-19,共3页
Journal of Chongqing College of Education
关键词
共振光散射
碘离子
十二烷基苯磺酸钠
resonance light scattering
iodine ion
sodium dodecyl benzene sulfonate
