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测定生物样品中的硒，常采用湿法处理，此法对硒元素将有不同程度的挥发损失。用铜作为催化稳定剂，可有效地防止硒挥发损失。
Determination of biological samples of selenium, often using wet treatment, this method of selenium will have varying degrees of volatile loss. With copper as a catalyst stabilizer, can effectively prevent the loss of selenium volatilization.