摘要
在盐酸-硫酸介质中，钛、铁与二安替比林甲烷分别生成黄色络合物和红色络合物；选出合适测定波长为390nm和520nm。研究了酸度、显色剂用量、显色时间及共存离子对测定结果的影响。结果表明：钛在0～7．4μg／mL、铁在0～6μg／mL范围内遵守比尔定律，其表观摩尔吸光系数分别为0．954×10^4L／（mol·cm）和0．266×10^4L／（mol·cm）。此方法简便、准确，用于（Zn—Fe）-TiO2复合镀层中Fe和TiO2复合量的同时测定是可行的。
In hydrochloric acid- sulphuric acid medium, titanium reacts with di-antipyrine methane to form a yellow complex. Iron reacts with di-antipyrine methane to form a red complex. The optimum absorption of the complexes were at 390 nm and 520 nm respectively. The effect of acidity, chromogenic agent, chromogenic time and co-existing elements on the measurement was studied. The results show that Beer＇s Law is obeyed when titanium content is in the range of 0～7.4 μg/mL and when iron content is in the range of 0～6 μg/mL. The molar absorptivity are 0. 954×10^4 L/（mol ·cm） and 0. 266×10^4 L/（mol· cm）. The method is simple and accurate. It can be used to determine Fe and TiO2 in （Zn-Fe）-TiO2 composte coatings with satisfactory result.
出处
《电镀与精饰》
CAS
2006年第5期44-46,共3页
Plating & Finishing
关键词
复合镀层
TIO2
FE
二安替比林甲烷
composite coating
titanium dioxide
iron
di-antipyrine methane
