( 2012· 大同检测 ) 下列关于测定亚硝酸盐含量的操作 , 错误的是 ( ) A . 质量浓度为 4 mg/mL 的对氨基苯磺酸溶液呈酸性 B . 氨基苯磺酸溶液和 N - 1 -萘基胺盐酸盐溶液应避光保 存 C . 质量浓度为 5 μg/mL 的亚硝酸钠溶液应保持弱碱性环境 D . 制备样品处理液 , 加入氢氧化铝的目的是中和氢氧化钠
A.
B.
C.
D.
D
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【简答题】The
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