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當前位置:首頁  >  技術文章  >  MTP2000 醫用超聲乳化儀標準操作步驟

MTP2000 醫用超聲乳化儀標準操作步驟

更新時間:2025-11-12      點擊次數:160

重要提示:

請務必在操作前仔細閱讀并理解完整用戶手冊。

始終佩戴個人防護裝備(護目鏡、實驗服、手套)。

確保設備放置在穩固、水平的工作臺面上。

步驟 1:準備工作與環境設置

清潔工作區: 確保操作臺面潔凈,無雜物。推薦在生物安全柜內處理具有生物安全風險的樣品(如病原體、臨床樣本)。

組裝隔音箱: 將設備配套的隔音箱正確安裝到位,確保其穩固。這是降低噪音和防止樣品飛濺的關鍵安全屏障。

選擇合適探頭: 根據您的樣品量和處理目的(如:精細分散、強力破碎)選擇合適的鈦合金探頭(尺寸范圍 Φ3mm - Φ25mm)。探頭尺寸應小于樣品容器直徑的1/3。

安裝探頭: 關閉設備電源。將選定的探頭順時針旋入換能器前端的螺紋接口,確保擰緊。(注意:切勿在開機狀態下安裝或拆卸探頭)

樣品準備: 將需要處理的樣品置于合適的容器中(如離心管、燒杯)。確保容器材質能耐受超聲(如玻璃、特定塑料)。對于熱敏性樣品(如蛋白溶液、活細胞懸液),強烈建議 :

使用冰浴:將樣品容器放置在裝有冰水混合物的燒杯中。

連接冷卻系統:若設備配有外置循環冷卻器或內置冷卻接口,提前設置好所需溫度(通常推薦 4°C 或根據樣品要求設定)并開啟運行。這是保護生物樣品活性的關鍵步驟。

固定容器: 使用隔音箱內配套的支架或夾具,將樣品容器穩固地固定在探頭正下方合適位置。探頭末端應浸入液面以下 1-2cm ,并確保探頭末端距離容器底部 >1cm (通常建議至少為探頭直徑的1.5倍),避免接觸容器壁或底部導致探頭損壞。

步驟 2:設備開機與參數設置

連接電源: 確保設備電源線正確接入接地良好的電源插座。

開機: 按下設備背面的電源開關(通常為 “I" 位置)。

設備自檢: 設備啟動后,顯示屏點亮,可能進行短暫的自檢。

設置工作模式:

連續模式 (Continuous): 探頭持續輸出超聲能量。適用于需要短時、高強度處理的樣品。

脈沖模式 (Pulse): 探頭按設定的“工作時間 (ON)"和“間歇時間 (OFF)"周期性地輸出能量。推薦模式 ,尤其對于熱敏感樣品(如細胞裂解、蛋白溶液),它能有效減少熱量累積。常用設置如 “2s ON, 1s OFF" 或 “5s ON, 5s OFF",可根據樣品耐受性調整。

設置處理時間 (Time): 通過 ↑/↓ 鍵設定總處理時間(范圍:1秒至99分59秒)。超出設定時間后設備自動停止。

設置振幅 (Amplitude): 通過 ↑/↓ 鍵設定振幅百分比(20% - 100%)。設定原則:

細胞/組織溫和破碎:30% - 50%

脂質體/納米粒制備:50% - 70%

強力分散/乳化(如疫苗佐劑):70% - 90%

難溶性藥物分散/均質:根據樣品粘度調整,通常60% - 80%

起始建議: 初次處理未知樣品,從中低振幅(如30%-50%)開始,逐步增加至所需效果。

應用參考:

設置功率 (Power): 在振幅設定后,功率值(W)會根據振幅大小由系統自動計算并顯示(只讀或部分型號可手動設定上限)。功率反映實際輸出的能量強度。

步驟 3:啟動超聲處理與過程監控

再次確認: 確認探頭位置正確(浸入深度、不接觸容器)、樣品容器穩固、參數(模式、時間、振幅)設置無誤。

啟動處理: 按下控制面板上的 “START" 或 “RUN" 按鈕。

密切觀察:

樣品狀態: 隔音箱觀察窗內,注意觀察樣品是否形成穩定的渦流或產生均勻的云霧狀(空化效應表現)。避免產生過多泡沫或劇烈飛濺。

溫度監控: 如果樣品對溫度敏感,務必使用溫度計或紅外測溫儀監控樣品溫度。若溫度上升過快,立即暫停處理,加強冷卻(如添加冰塊、降低振幅、延長脈沖間歇時間或啟用冷卻循環)。

設備運行: 注意聽設備運行聲音是否平穩,無異常噪音。觀察顯示屏參數是否穩定。

暫停/停止:

需要臨時中斷:按下 “PAUSE" 或 “STOP" 按鈕。

完成處理或需提前結束:按下 “STOP" 按鈕。

緊急情況:立即拔掉設備電源插頭(或按下緊急停止按鈕)。

步驟 4:處理結束與后續操作

關閉設備: 處理完成后,按下 “STOP" 按鈕,然后關閉設備背面的電源開關 (“O" 位置)。

取出樣品: 小心打開隔音箱,取出樣品容器。注意容器和探頭可能發熱(即使在脈沖模式下)。操作時佩戴隔熱手套。

探頭清潔與維護:

立即用去離子水或溫和清潔劑(如實驗室專用清洗劑)擦拭探頭末端,去除殘留物。避免使用強酸、強堿或磨蝕性清潔劑。

用柔軟的無塵布擦干探頭。

長期不使用時,將探頭卸下,清潔干燥后單獨存放。

設備清潔: 清潔隔音箱內部、支架等可能接觸樣品的部件,保持設備整潔。

樣品處理: 根據實驗需求,對處理后的樣品進行后續分析、檢測或保存。

關鍵安全注意事項(醫用操作核心)

探頭接觸: 絕對禁止 探頭末端在空氣中(未浸入液體)運行,或在運行時接觸容器壁/底。這會導致探頭劇烈振動,產生刺耳噪音,并極易損壞探頭和換能器。

生物安全: 處理具有生物危害性的樣品(如病原微生物、人類血液/組織樣本)時,必須在相應生物安全等級(BSL) 的實驗室和生物安全柜內進行操作,并嚴格遵守相關生物安全規范(如穿戴防護服、口罩、面罩等)。

樣品飛濺: 確保隔音箱門關閉嚴實。處理高粘度或易起泡樣品時,降低振幅或使用脈沖模式可減少飛濺風險。

過熱風險: 始終監控樣品溫度! 過高溫度會滅活生物分子、破壞樣品結構。充分利用冰浴和冷卻循環系統。

個人防護: 操作全程 佩戴護目鏡、實驗服和防護手套。避免皮膚直接接觸探頭(尤其運行時)。

設備維護: 定期檢查探頭是否有磨損、變形或裂紋。如有損壞,立即停止使用并更換。按照手冊要求進行常規維護。

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