摘要
利用 5 -Br-PADAP -H2 O2 -V三元体系分光光度法测定油品中微量钒 ,考查了各种影响因素 ,得到测定的适宜条件。结果表明 ,此三元体系在酸性条件下能长时间稳定 ,以H3PO4作介质 ,乙二胺四乙酸钠和酒石酸作掩蔽剂可消除油品中常见离子的干扰。方法操作简单、灵敏度高、准确性好 ,适用于油品中微量钒的分析。
Br-PADAP-H 2O 2-V spectrophotometry was used to determine vanadium in oil products. Influencing factors were studied to obtain the best conditions of determination.Results indicate that in acid medium,vanadium reacts with 5-Br-PADAP and H 2O 2 to form a violet-red complex,which is very stable under room temperatures.The interference of metal ions in the oil can be eliminated using H 3PO 3 solution as medium and Na-EDTA solution and tartaric acid as masking agents.The operation is simple,with high sensitivity,and good precision and accuracy.The recovery is in the range of 94 9%～103 5%. [
出处
《石油化工》
CAS
CSCD
北大核心
2001年第4期308-310,共3页
Petrochemical Technology
