常用的微量砷化学测定法准确度和灵敏度低,操作复杂。原子吸收分析法一般灵敏度高,受共存物质的干扰少,但砷的共振线在2,000(?)以下,用通常的火焰法,会有火焰和空气对共振线的吸收及发生光散射,使灵敏度降低,测定困难。为了克服这个困难,作者利用吸光少的氩-氢火焰进行测定。生物样品的处理: Common trace arsenic chemical assay accuracy and sensitivity are low, the operation is complicated. AAS generally has high sensitivity and less interference by coexisting substances. However, the resonance line of arsenic is below 2,000 (?). Flame and air absorb light by the flame and air to the resonance line by ordinary flame method, and the sensitivity Reduce the determination of difficulties. In order to overcome this difficulty, the authors use less argon-hydrogen flame to measure. Biological sample processing: