摘要
报道了新试剂1-(6-硝基-2-苯并噻唑)-3-(5-溴-8-喹啉)-三氮烯(NBTBQT)的合成、纯化、结构鉴定及性质,并研究了其与镍的显色反应。在PH9.5的硼砂-氢氧化钠缓冲介质中,在表面活性剂CTMAB存在下,试剂与镍形成2:1蓝色络合物,络合物最大吸收波长位于633nm,表观摩尔吸光系数为2.16×10^5L·mol^-1·cm^-1,镍的质量浓度在9~240μg/L范围内符合比尔定律,检出限为2.70×10^-9g/mL。方法应用于铝合金中镍的测定,相对标准偏差在1.2%~1.7%之间,测定结果与认定值相符。
A new triazene reagent 1-(6-nitro-2-benzothiazolyl)-3-(5-bromo-8-quinolyl)-triazene has been synthesized,purified and identified. The color reaction of this reagent with nickel has been studied. In the medium of Na2B4O7-NaOH buffer solution at pH 9. 50 and in the presence of surfactant cetyltrimethylammounium bromide (CTMAB), the reagent reacted with nickel to form a stable blue complex with a molar ratio of 2 : 1. The complex has a maximum absorption at 633 nm and the apparent molar absorptivity of the system is 2.16×10^5 L·mol^-1·cm^-1. Beer's law is obeyed in the range of 9-240μg/L for nickel. The detection limit is 2.70×10^-9 g/mL. The method has been applied to determine nickel in aluminum alloy samples and the results are consistent with the certified content with the RSD of 1.2%-1.7%.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2008年第1期27-30,共4页
Metallurgical Analysis
基金
广西教育厅2004年基金