简述评价前处理方法应遵循的准则
(1)选方法应能最有效地除去测定的干扰组分。(2)待测组分的回收率要足够高。(3)操作简便、省时。(4)尽量避免使用昂贵的试剂和仪器。(5)对生态环境和人体健康不产生影响。
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