摘要
研究了 2 (5 溴 2 吡啶偶氮 ) 5 二乙氨基苯酚 (5 Br PADAP)作为微量钍的显色剂。在pH 5 .0的HAc NaAc缓冲体系中和非离子OP乳化剂的存在下 ,5 Br PADAP和钍 (Ⅳ )的络合物在λmax=5 85nm处的表观摩尔吸光系数为 1.3 5× 10 5L·mol- 1 ·cm- 1 。钍 (Ⅳ )的质量浓度在 0～ 0 .5 0mg·L- 1 范围内符合比耳定律。钍的加标回收率在 98.5 %～ 10 3 .6%之间 ,结合PMBP萃取分离 。
In pH 5.0 HAc NaAc buffer solution the color reaction of trace Th(Ⅳ) with 5 Br PADAP was studied in the presence of OP emulsification reagent. The results show that the maximun absorption of the complex is at 585 nm and the apparent molar absorptivity is 1.35×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed for Th(Ⅳ) in the range of 0～0.50 mg·L -1 , and the recovery is 98.5%～103.6%. Combined with PMBP extraction, the method was applied to the determination of trace Th in coal gangue with satisfactory results.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2003年第3期416-417,共2页
Chinese Journal of Rare Metals
