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lcms問題,搞了一個月沒摘好。還多了其他問題,做個總結(已查詢過工程師)

  • Ins_f6478287
    2022/01/14
  • 私聊

液质联用(LCMS)

  • I have some questions about sensitivity and stability of LCMS.(Thermo TSQ Vantage)

    Question 1:

    An analyte can be recognized in optimization, but it cannot be detected when run the LCMS.

    Ways that I tried :

    -tried new mobile phase, standard, column

    -removed the column and inject directly

    -optimization again

    -changed the collision energy

    - injected the sample with and without sample pretreatment (same as hk)

    Question 2:

    After a few days,Another analyte ‘s area decreased significantly after an overnight injection. It was good before. However, its d8 internal standard is still normal.

    Ways that I tried :

    -prepared new standard

    -changed the gradient

    -injected without column

    -clean and sonicate the MS

    -bake the ion source

    Question 3:

    All analytes' stability is not very good when injecting the same sample many times.

    After trying the above methods, the problems are not solved yet. And the engineers can not tell the reasons as well, especially Question 2. I am looking forward to seeing your reply. Thank you very much.

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  • hujiangtao

    第1楼2022/01/16

    应助达人

    打400找赛默飞工程师上门吧

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  • m3036177

    第2楼2022/01/16

    报修 花钱上门支持

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  • Ins_f6478287

    第3楼2022/01/17

    你好 請問有推薦嗎?

    hujiangtao(hujiangtao) 发表:打400找赛默飞工程师上门吧

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  • Ins_f6478287

    第4楼2022/01/17

    你好 請問有推薦嗎?

    m3036177(m3036177) 发表:报修 花钱上门支持

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    +关注 私聊
  • m3036177

    第5楼2022/01/17

    4006505118

    Ins_f6478287(Ins_f6478287) 发表: 你好 請問有推薦嗎?

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