40.氣相層析的頂空分析(head space analysis)是新的進樣方式..-阿摩線上測驗
4F Kenny Wang 小一上 (2017/07/20)
Splitless Injection
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Splitless Injection In splitless mode the split vent is closed during the first part of the injection. This means that the sample can only go down the column. This leads to much higher detection limits because most of the sample will go down the column instead of out the split vent. Splitless is used for low concentration samples. One thing to remember about splitless is that the gas flow through the liner is equal to the column flow. So the flow through the liner could be as low as 0.5ml/ min. This means you have to wait longer to flush the sample into the c... 查看完整內容 |
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