氢化物发生器HVG-100

 

    目前很多食品、药品、环境等相关标准将氢化物发生法作为测定砷（As）、硒（Se）和锑（Sb）标准方法之一。砷（As）、硒（Se）和锑（Sb）等元素水溶液在酸性条件下与强还原剂KBH或NaBH4反应，生成气态的氢化物，由氩气带入原子吸收分光光度计燃烧头上的石英管内进行原子化，测量其吸光度。

    硼氢化物在酸性介质中的反应

BH4- +H++3H2O→H3BO3+8H

    与被测元素反应（以As为例）

As3++3H→ AsH3（ H+过量）

    所产生的氢化砷气体由载气送入T型石英吸收池，通过火焰加热或马弗炉加热的方式使其原子化而实现测定。

HVG-100技术特点：

► 适用范围广：适用岛津各型号原子吸收（从AA-6200至AA-7000均可使用）
► 灵敏度高：相比国产品高出25%以上（砷1%吸收值0.15ppb以下）
► 操作简便：改进部件结构，增加空间，便于操作维护

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