【摘要】 在 0 .6 mol· L-1的硫酸介质中 ,钒 - PAR-羟胺生成红色络合物 ,最大吸收波长为 5 5 0 nm,摩尔吸光系数ε=1.91× 10 4L· mol-1· cm-1,钒含量在 0— 80μg/ 2 5 m L范围内符合比耳定律。本方法灵敏、简便 ,用于测定煤灰中的钒 ,结果满意更多还原

【Abstract】 A red complex of vanadium \|4\|(2\|pyridylazo) resorcinol (PAR)\|hydroxylamine was formed in 0.6mol·L -1 H 2SO 4. The maximum absorption is at 550nm and the apparent molar absorptivity is 1 91×10 4L·mol -1 ·cm -1 . Beers law is obeyed in the concentration range 0-80μg/25mL for vanadium. This method is sensitive and simple. The method has been applied to the determination of vanadium in coal ashes with satisfactory results.更多还原