在用氢化物发生-原子吸收光谱法测定硒时,二价阳离子产生干扰的原因仍是一个有争论的问题。据认为,这些阳离子与氢硼化钠反应生成金属硼化物,而不象人们通常所认为的那样,生成了金属元素。众所周知,金属硼化物活性很强,因而在氢化硒到达检测系统以前,金属硼化物就使氢化硒分解了。 The reason why divalent cations interfere with each other when determining the concentration of selenium by hydride generation-atomic absorption spectrometry remains a controversial issue. It is believed that these cations react with sodium borohydride to form metal borides rather than forming metal elements as is generally believed. It is well-known that metal borides are very reactive and thus metal borides decompose hydrogenated selenium before the selenium reaches the detection system.