孔雀绿-磷锑钼杂多酸光度法测定钢样中的磷  

Spectrophotometric Determination of Phosphorus in Steel by the Malachite Green-Phosphorus Antimony Molybdenum Heteropoly Acid

作　　者：李冰[1] 张莹琪[1] 李江[1] 盛利新 

机构地区：[1]太原工业学院化学与化工系,山西太原030008

出　　处：《中北大学学报（自然科学版）》2015年第2期214-218,共5页Journal of North University of China(Natural Science Edition)

摘　　要：在 OP/正戊醇/正庚烷/水微乳介质中,建立了孔雀绿-磷锑钼杂多酸缔合分光光度法测定钢样中的磷的方法,研究了显色时间、显色剂、微乳液、酸的用量对显色反应的影响.结果表明：离子缔合物的最大吸收波长为660 nm,表观摩尔吸光系数为9.4×10^4 L·mol^-1·cm^-1,磷含量在0.04-0.44μg/mL 内符合比尔定律.孔雀绿与磷锑钼的络合比为4∶1.该法较传统的磷的测量方法灵敏度高,14种常见离子对反应基本无干扰.用于钢样中磷的测定相对标准偏差在3%之内.Determination of phosphorus in steel was established by spectrophotometry of malachite green-phosphorus antimony molybdenum heteropoly acid in microemulsion medium of OP/n-C5 H 1 1 OH/C7 H 1 6/H 2 O.The influence of the Chromogenic time,usages of Chromogenic agent,microemulsion and acid in the Chromogenic reaction was researched.The results indicate that the maximum absorption wavelength of ion association complex is 660 nm.The apparent molar absorptivity is 9.4 × 10^4 L·mol^-1 · cm^-1 , and Beer’s law is obeyed in the P concentration range of 0.04-0.44 μg/mL.Ratio of complexation of malachite green and phosphorus antimony molybdenum is 4∶1.Compared with the corresponding tradi-tional determination method of phosphorus,it has higher sensitivity.The 14 kinds of common ions have almost no interference to reactions.RSD is less than 3% in the determination of phosphorus on steel samples.

关 键 词：微乳液 孔雀绿 钼酸铵 酒石酸锑钾 分光光度法 钢 磷 

分 类 号：O657.32[理学—分析化学]