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AB液質聯用儀6500檢測方法靈活性分析
2025-07-03

AB液質聯用儀6500檢測方法靈活性分析:1.多模式分析能力正/負離子切換模式:支持快速切換正離子模式(ESI+)和負離子模式(ESI-),可同時檢測不同極性的目標物(如代謝物、脂質、肽類等),無需更換樣品或調整參數。多重掃描模式:支持MRM(多反應監測)、FullScan(全掃...

  • 2023-03-24

    液質聯用儀開關機步驟春節假期臨近,小伙伴們在享受假期之前一定要做好儀器的關機工作,保證水、電、氣安全,才能保證節后儀器正常開機使用。一、關機篇1、液相流路沖洗及關機步驟首先將色譜柱沖洗,按照使用說明書中指明溶劑保存色譜柱。取下色譜柱,換上兩通,斷開液相進入離子源管路,流動相置換成50%甲醇水溶液,以0.4mL/min的流速沖洗60min,流動相和洗針液置換成甲醇,流動相管路排氣5min,自動進樣器管路排氣25min,以0.4mL/min的流速沖洗管路30min,停止輸液,關閉...

  • 2023-03-24

    液相色譜儀是屬于易學難用的儀器,特別講究“正確使用”和經驗。液相工作者接觸最多的是流動相,也就是流動相,是造成液相色譜各種問題的最主要源頭。液相色譜儀最常見的故障一是堵,二是漏。下面就這兩點分別展開討論。(注:流動相以甲醇為例,色譜柱以C18為例)“堵”的表現現象就是柱壓異常升高,直接原因就是流路不暢。堵塞的主要位置就是在色譜柱的前端,最主要原因就是流動相里有雜質,雜質的主要來源就是細菌。“堵”的原因之一:配制流動相時細菌污染。首先我們要認識到,一般的國產甲醇其實不需要額外過...

  • 2023-03-24

    常見故障現象及處理方法系列三:信號異常排查步驟設備使用過程中出現無信號或信號不穩定時,可參考以下步驟排查并記錄結果,便于判斷故障原因。一、無信號檢查步驟1、記錄出現此現象的時機是在工作時突然出現,還是在一段時間沒用儀器,再開機后出現的。在故障之前,動了儀器哪些部位。2、真空問題檢查真空是否正常,Q1Scan方式,真空度通常應該在0.7~1.2×10-5torr。真空度過好有可能orifice堵塞;真空度過差可能存在漏氣或者真空泵異常。若orifice堵塞,可用50%甲醇水清洗...

  • 2023-03-24

    常見故障現象及處理方法系列二:離子源常見故障及維護導言:離子源在長期使用過程中,會出現漏液、漏氣、加熱模塊故障或者霧化效果不好等故障,因此需要定期進行檢修維護。以下介紹幾種常見的故障現象及處理方法。1、質譜圖標變紅,離子源安裝異常打開質譜圖標(如下圖),查看Source/IonPathElectronics,正常應為On。Off則為異常狀態。若顯示Off,排查方法如下:1.1、查看VacuumGauge真空讀數(待機狀態)是否達到要求范圍。1.2、若真空讀數正常,檢查噴霧頭觸...

  • 2023-03-24

    常見故障現象及處理方法系列一:質譜無法正常開機質譜長期未使用、異常關機后可能會出現無法正常開機情況,下面我們介紹一些質譜無法正常開機后的處理方法。一、質譜開機步驟及易故障現象1、檢查氣體壓力是否正常(參考下圖)。若壓力異常,調節相應閥門使之達到正常壓力。若出現無壓力或調節閥門無效情況,請及時聯系工程師檢修氮氣發生器或檢修氣路。2、檢查機械泵油量,如需要,請及時更換泵油(請參考:機械泵維護指南。(超鏈接)),打開機械泵。若機械泵無法開機或出現異響,請及時聯系工程師檢修。3、約3...

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