试题与答案

测定溶解氧的水样应在现场加入（）作保存剂。A、H3PO4 B、HNO3 C、MnSO

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题型：单项选择题

题目：

测定溶解氧的水样应在现场加入（）作保存剂。

A、H3PO4

B、HNO3

C、MnSO4和碱性KI

D、2.5%的EDTA溶液

答案：

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考点：水环境监测工水环境监测工题库
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