用氢化物发生器测定环境样品中的As Sb Se

Hydride generation techniques are used routinely for the determination of As, Se, and Sb in environmental samples. Advantages include high sensitivity, simplicity and relative freedom from interferences. The current method for the hydride generation determination of As and Se, as outlined in the USEPA manual SW-846, utilizes zinc slurry methodology. A batch type method is described. Batch type hydride generators are inherently slow and prone to interferences. These problems can be overcome with continuous flow systems which are faster, simpler to use and more reliable. Also, interferences are more easily managed.