摘要
合成了新显色剂1-偶氮苯-3-(3-硝基-5-氯-2-吡啶)三氮烯(ABNCPDT),并研究了它与镍的显色反应.在pH 10.5的Na2B4O7-NaOH缓冲溶液中,TX-100表面活性剂存在下,试剂与镍生成4:1型红色配合物.配合物的最大吸收峰位于540 nm,表观摩尔吸光系数为1.86×105L·mol-1·cm-1.Ni2+浓度在0～480μg/L范围内符合比尔定律.用拟定方法测定铝合金中微量镍,结果满意.
1-Azobenzene-3-（3-nitro-5-chloro-2-pyridyl）triazene（ABNCPDT） was synthesized and its color reaction with nickel was investigated. In the presence of the surface active agent Triton X-100 and in the Na2B4O7-NaOH medium of pH 10.5, ABNCPDT forms a red complex with Ni（ Ⅱ ） . The apparent molar absorbtivity of the complex is 1.86×10^5L·mol^-1·cm^-1.at 540nm. The molar ratio of Ni （Ⅱ） to ABNCPDT is 1：4. Beer＇s law is well obeyed in the range of 0 -480 μg/L for nickel . The method was applied to the direct determination of nickel in aluminium alloys with satisfactory results.
出处
《化学研究》
CAS
2005年第4期83-85,共3页
Chemical Research
基金
丽水学院重点课题(KZ04006)
关键词
偶氮苯
三氮烯
镍
分光光度法
显色剂
azobenzene
triazene
nickel
spectrophotometry
chromogenic agent
