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【多选题】
气相色谱分离操作条件下列描述正确的是( )
A.
当载气流速较小时，采用相对分子质量较大的载气（氮气、氩气）
B.
速度必须尽可能的快，一般要求时间应小于1秒钟
C.
量多少应以能瞬间气化为准，在线性范围之内。
D.
气化室的温度一般比柱温低30～70℃。
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