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安全使用HClO4-HNO3消解体系消解化妆品以测定铅时,以下注意事项中错误的是()
- A、为防止加入硝酸后反应过于剧烈,导致试样溅出损失,可采取向试样中先加入少量水
- B、在加热过程中如需添加HNO3或高氯酸时,可立即、随时加入
- C、消解时,可用表面皿或小漏斗等覆盖容器,使HNO3和高氯酸呈回流状态
- D、在消解过程中,要不停地仔细观察试样状态
- E、在液面仍可见脂肪成分的漂浮物时,要防止使用或进入高氯酸消解阶段
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更多 “安全使用HClO4-HNO3消解体系消解化妆品以测定铅时,以下注意事项中错误的是()A、为防止加入硝酸后反应过于剧烈,导致试样溅出损失,可采取向试样中先加入少量水B、在加热过程中如需添加HNO3或高氯酸时,可立即、随时加入C、消解时,可用表面皿或小漏斗等覆盖容器,使HNO3和高氯酸呈回流状态D、在消解过程中,要不停地仔细观察试样状态E、在液面仍可见脂肪成分的漂浮物时,要防止使用或进入高氯酸消解阶段” 相关考题
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