摘要
在 0 4～ 0 6mol/LH2 SO4 介质中 ,有乳化剂OP存在下 ,锡与二溴羟基苯基荧光酮形成稳定的 1∶3有色络合物 ,其极大吸收在 5 10～ 5 15nm波长处 ,摩尔吸光系数ε=1 2× 10 5,锡质量浓度在 0～ 0 4μg/mL范围内符合比尔定律。钢铁材料中主要存在的铁、铜不影响本法的结果 ,只有钼、钛、钨有干扰 ,其中钼的影响可用盐酸羟胺将其还原成低价钼后消除 ,而钛、钨在碳钢、低合金钢中含量甚微可不予考虑 ,所拟方法成功地用于上述钢中钼的测定。
In the presence of emulsifier OP and 0.4-0.6mol/L H 2SO 4 medium,tin reacts with bromo-hydroxyphenylfluorone to form a stable colored complex with molar ratio of 1∶3,which has a maximum absorption at 510-515nm Its apparent molar absorption coefficient is 1 2× 10 5 L·mol -1 ·cm -1 Beer’s law is obeyed in the range of 0-0 4μg/mL Iron and copper do not interfere in the determination of tin, only molybdenum,titanium and tungsten do The interference of molybdenum can be eliminated with hydroxylamine hydrochoride The influences of titanium and tungsten can be ignored for their trace contents in carbon steel and low-alloy steel The drafted method has been applied to the determination of molybdenum in steel with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2003年第6期45-46,共2页
Metallurgical Analysis
