论文部分内容阅读
钼是人体必需的微量元素之一,人体内钼含量与某些疾病甚至癌症有关联.人发中钼含量很低,仅为60～200ppb.有关人发中钼的测定报导甚少.我们采用杏仁酸-硫酸-氯酸钠体系,接合氧瓶燃烧法消化样品,由钼的催化极谱电流分析测定人发中痕量钼.本方法灵敏度高,可达24ppb;取样量少(<100mg);分析速度快(<15min);仪器价廉;操作简便;宜于推广为人发中痕量铝的快速常规测试方法. 1.测定介质的组成与浓度的选择经试验,找到人发中钼测定的最佳体系为0.2M硫酸-0.1M杏仁酸-20%氯酸钠. 2.人发样品的预处理及发样燃烧包装纸的空白试验
Molybdenum is one of the essential trace elements of the human body, the body’s molybdenum content is associated with certain diseases and even cancer, the content of molybdenum in human hair is very low, only 60 ~ 200ppb. There are few reports on the determination of molybdenum in human hair. Determination of Trace Molybdenum in Human Hair by Catalytic Polarographic Current Analysis of Molybdenum Using Mannich Acid-Sulfuric Acid-Sodium Chlorate System Coupled with Oxygen Flask Combustion Method This method has a high sensitivity of up to 24 ppb with a small sample volume (<100 mg) ; Analysis speed (<15min); Instrument is cheap; Easy to operate; It is appropriate to promote the human hair in the trace of aluminum rapid routine test method 1. Determination of the composition and concentration of the medium of choice The best system for the 0.2M sulfuric acid -0.1M mandelic acid -20% sodium chlorate 2. Human hair samples pre-treatment and hair sample combustion blank paper test