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 高等继续教育 / 药物检测技术
正确率:100%

采用硫氰酸盐法检查铁盐时,加入过硫酸铵的作用有
A、将供试品中Fe2+氧化成Fe3+
B、防止Fe3+水解
C、防止光线使硫氰酸铁还原
D、防止硫氰酸铁分解褪色
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