摘要
研究了在盐酸介质中,V(Ⅴ)-I--十六烷基三甲基溴化铵(CTMAB)离子缔合物的共振散射光谱。实验发现,当有V(Ⅴ)存在时,V(Ⅴ)与过量的I-反应生成I3-,I3-与CTMAB形成离子缔合物微粒(CTMAB+.I3-)n,使I--CTMAB溶液的共振光散射强度显著增加。在波长563nm处,共振散射光强度最大且光散射强度与钒浓度在2～60ng/mL范围内呈正比,据此建立了测定环境样品中痕量钒的共振散射光谱分析新方法,方法检出限为0.66ng/mL。用拟定的方法测定环境样品中微量钒,相对标准偏差小于7.5%,回收率在97.8%～102.4%。
The resonance light scattering （RLS） spectrum of the V（Ⅴ） -I--cetyltrimethyl ammoniun bromide （CTMAB） ion association complex was studied in hydrochloride acid medium. V（Ⅴ） reacted with I-to form I-3,and funther combined with CTMAB to form an ion association particle（CTMAB＋／5I-3）n,which increased the intensity of resonance ligth scattering significantly. The RLS signal reached to the highest intensity at the wavelength of 563 nm,and the intensity was proportional to the concentration of V（Ⅴ） in range of 2~60 ng/mL. And a new resonance light scattering spectral method was established for the determination of trace V（Ⅴ） in environmental samples. The detection limit of the method was 0.66 ng/mL. The proposed method has been used for the determination of vanadium in enviromental samples with relative standard deviation less than 7.5% and recovery of 97.8%～102.4%.
出处
《分析科学学报》
CAS
CSCD
北大核心
2010年第2期203-206,共4页
Journal of Analytical Science
基金
广西自然科学基金(桂科自0728218
0679005)
广西研究生教育创新计划项目(2009105960703M17)
桂林理工大学博士基金
关键词
V(Ⅴ)
I-
十六烷基三甲基溴化铵
共振光散射
Vanadium （Ⅴ）
Iodide
Cetyltrimethyl ammonium bromide
Resonance light scattering
