问题
单项选择题
采用化学法测定溶解氧时，现场固定采集水样的方法是( )。
A．(A) 加入MnSO4溶液
B．(B) 加入碱性KI溶液
C．(C) 加入MnSO4和碱性KI溶液
D．(D) 只要塞紧瓶塞
答案
参考答案：C
解析：测定溶解氧的水样则需加入少量硫酸锰和碘化钾固定溶解氧。
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采用化学法测定溶解氧时，现场固定采集水样的方法是( )。
A．(A) 加入MnSO4溶液
B．(B) 加入碱性KI溶液
C．(C) 加入MnSO4和碱性KI溶液
D．(D) 只要塞紧瓶塞
参考答案：C
解析：测定溶解氧的水样则需加入少量硫酸锰和碘化钾固定溶解氧。
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