摘要
研究了钒 - 2 ,4-二氯苯基荧光酮 (DCIPF) -CTMAB三元配合物的显色反应条件及应用。结果表明 :在PH =6.0的 (CH2 ) 6N4-HCI缓冲溶液中 ,在表面活性剂溴化十六烷基三甲胺(CTMAB)存在下 ,钒与DCIPF形成 1∶3的配合物 ,其最大吸收波长λmax=5 67nm ,表观摩尔吸光系数为 1 .0 8× 1 0 5L·mol- 1 ·cm- 1 ,钒的含量在 0～ 1 1 μg/ 2 5ml范围内符合比尔定律。此方法操作简便、快速 ,在掩蔽剂NaF存在下用于合金钢标样中钒的测定 。
The reacting condition and application of DCIPF and V(V) was studied. The results show that with the presence of CTMAB the color reagent react with V(V) and forms a stable blue complex in the medium of (CH 2) 6N 4-HCL. It remains stable for 4 hours at least. The apparent molar absorbancy index is 1.08×10 5L·mol -1·cm -1 and maximum absorption wavelength is at 568nm, Beer′s law is obeyed in the concentration range of 0～11μg/25mL for V(V). The proposed method has good sensitivity. It has been applied to the determination of trace amounts of V(V) in alloy steels and in the presence of Masking reagent with satisfactory results.
出处
《内蒙古石油化工》
CAS
2004年第2期37-39,共3页
Inner Mongolia Petrochemical Industry
