摘要
研究钼 (Ⅵ )与 2 羟基 3 甲氧基苯基荧光酮 (HMPF)的显色反应。在磷酸介质中 ,在阳离子表面活性剂CTMAB作用下 ,钼 (Ⅵ )与HMPF形成红色配合物 ,其最大吸收波长为 5 2 5nm ,表观摩尔吸光系数为 1.34× 10 5L/ (mol·cm) ,钼的浓度在 0～ 15 μg/(2 5mL)范围内服从比耳定律。可不经分离测定合金钢中的钼。用该法测定合金钢标准样品中的钼 ,测定结果与标准值相吻合 ,RSD为 0 .85 %～ 1.5 2 %。
The colour reaction between Mo(Ⅵ) and 2 hydroxy 3 methoxyphenylfluorone(HMPF) was studied. In H 3PO 4 solution and in the presene of CTMAB, Mo(Ⅵ) reacts with HMPF to form a red complex with a maximium absorption peak at 525 nm, which apparent molar absorptivity is 1.34×10 5 L/(mol·cm). Beer′s law is obeyed in the rang of 0～15 μg/(25 mL) for Mo(Ⅵ). The method can be applied to the determination of molybdenum in alloy steel without separation. The molybdenum in alloy steel standard sample was determined, the result basically agrees with the certified value, RSD is 0.85%～1.52%.
出处
《化学分析计量》
CAS
2005年第1期23-25,共3页
Chemical Analysis And Meterage
