【摘要】 目的:建立用双波长催化动力学光度法测定痕量钒的新方法。方法:在硫酸介质中,利用钒催化溴酸钾氧化吖啶橙和酸性铬蓝K褪色反应,分别在476 nm和556 nm处测量催化体系和非催化体系的吸光度的变化,用双波长催化光度法测定痕量钒。结果:测定钒的线性范围:0.00040～0.030μg/ml。检出限为:8.8×10-11g/ml。结论:该法简单,灵敏度高,选择性好,可用于食品中痕量钒的测定。更多还原

【Abstract】 Obiective:To establish a new dual-wavelength catalytic spectrophotometric method for the determination of vanadium.Methods:Vanadium was determined by dual-wavelength catalytic spectrophotometric method which was based on the vanadium catalyzing oxidation of acridine orange and acid chrome blue K by potassium bromate in 0.010 mol/L H2SO4 medium.The absorbance of catalytic and uncatalytic systems at 476 nm and 556 nm were measured.Results:The linear range of the determination of vanadium was 0.00040~0.030 μg/ml.The detection limit was 8.8×10-11 g/ml.Conclusion:The method is simple and of high sensitivity and good selectivity.It can be applied to the determination of vanadium in foods.更多还原