Determination of trace arsenic from water sample by hydride atom absorption, and effect of valence number of arsenic and varied coexisting ions on the determination were discussed.

• 采用氢化物原子吸收法测定样品中痕量砷,对于样品的前处理及采用氢化物法测定砷含量时,砷的不同价态及共存离子的影响,分别进行了探讨。