摘要
利用水杨基荧光酮（SAF）、阳离子表面活性剂溴化十六烷基吡啶（CPB）与钨（Ⅵ）形成三元络合物，建立了测定微量钨的光度分析方法。该络合物的最大吸收波长为520nm，表观摩尔吸光系数ε520=1.22×10^5L/(mol·cm)，钨的浓度0-10μg/25mL范围内服从比尔定律，钨（Ⅵ）的回收率为96．0％－102．4％，测定的标准偏差为0．24。该法可用于矿物和合金钢中钨的测定。
The determination of W with salicylfluorone and hexadecyl pyridinium bromide complex by spectrophotometry has been studied. The absorbance maximum of the ion-association complex is determined at 520 nm. The molar absorptivity is 1.22 × 105L/(mol·cm). Beer's law is obeyed with W( Ⅵ ) density in the range of 0 - 10 μg/25 mL. The recovery is 96.0% - 102.6%. The method is simple and can be used to determine the trace W in steel and ore samples.
出处
《化学分析计量》
CAS
2001年第3期20-21,共2页
Chemical Analysis And Meterage
