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合成了新显色剂 1 - [2 ,3,5-三氮唑偶氮 ]- 2 -萘酚 (简称 TZAN ) ,并研究了其性质及与钴显色反应的条件 ,测定了试剂有关参数。在 p H6.0 8的 HAc-Na Ac介质中 ,试剂与钴形成红色络合物 ,其最大吸收波长为 578.2 nm,摩尔络合比 Co2 +∶ R=1∶ 2 ,用双波长测定 ,表观摩尔吸光系数为 3.1 5× 1 0 4 L /mol·cm,钴量在 0～ 1 .0 μg/m L 范围内遵守比耳定律
A new reagent 1 - [2,5 - triazolylazo] - 2 - naphthol (TZAN) was synthesized and its properties and the conditions of its reaction with cobalt were studied. The relative parameters of the reagent . In the HAc-Na Ac medium of p H 6.08, the reagent forms a red complex with cobalt with a maximum absorption wavelength of 578.2 nm and a molar complex ratio of Co 2+: R = 1: 2 using a two-wavelength measurement, View the molar absorption coefficient of 3.1 5 × 104 L / mol · cm, cobalt content in the range of 0 ~ 1. 0 μg / m L obey Beer’s Law