催化褪色光度法测定中草药白花蛇舌草中的微量锗

Catalytic discoloring spectrophotometry determination of trace element germanium in Chinese herbal medicine(herba hedyotis)

目的利用催化褪色光度法测定中草药白花蛇舌草中微量元素锗。方法用超声波清洗仪提取中草药白花蛇舌草中微量元素锗,并用催化褪色光度法测定锗元素的含量。研究痕量锗在稀硫酸介质中催化加速溴酸钾、过氧化氢与中性红之间的反应,建立催化光度法测定痕量锗的方法。结果本实验测得中草药白花蛇舌草中无机锗(Ⅳ)含量为0.0248μg/g。结论该法灵敏度、精密度均能满足检测工作的需要。

Objective To explore a catalytic spectrophotometic method for the quantitative determination of trace elements germanium in Chinese herbal medicine（herba hedyotis）. Methods Extraction of trace element germanium in herba hedyotis was examined by using ultrasonic cleaning equipment, and the content was determined by catalytic discoloring spectrophotometry. The reaction was studied, trace germanium（IV） could accelerate potassium bromate and hydrogen peroxide oxidize neutral red in H2SO4 medium, the established method could be used to determine catalytic spectrophotometric determination of trace germanium（IV）. Results The results of this experiment indicated that inorganic germanium（IV） content in Chinese herbal medicine spreading herba hedyotis was 0.0248μg/g. Conclusion The sensitivity, the precision can meet the needs of the testing work well.