液氮容(rong)(rong)器(qi)(qi)內外部溫差是一個(ge)常見且普遍存(cun)在的(de)問題(ti),它會導致容(rong)(rong)器(qi)(qi)的(de)破損、變(bian)形、漏氮等問題(ti)。那么,如(ru)何減少液氮容(rong)(rong)器(qi)(qi)內外部溫差對容(rong)(rong)器(qi)(qi)的(de)影響呢?
一、選購適合的液氮(dan)容器
選擇(ze)適(shi)合(he)的(de)(de)(de)液(ye)氮容(rong)(rong)器(qi)(qi)(qi)是減(jian)少液(ye)氮容(rong)(rong)器(qi)(qi)(qi)內外部(bu)溫(wen)(wen)(wen)差的(de)(de)(de)關鍵。在選擇(ze)液(ye)氮容(rong)(rong)器(qi)(qi)(qi)時(shi),應該(gai)考慮到所(suo)需(xu)要存儲的(de)(de)(de)樣品類型和數量、使(shi)用頻率以(yi)及環境溫(wen)(wen)(wen)度(du)等(deng)因素(su)。基(ji)于這(zhe)些因素(su),選擇(ze)適(shi)合(he)的(de)(de)(de)容(rong)(rong)器(qi)(qi)(qi)尺(chi)寸和材質非常重(zhong)要。如(ru)今,市場上(shang)有各種(zhong)不同材質和尺(chi)寸的(de)(de)(de)液(ye)氮容(rong)(rong)器(qi)(qi)(qi)可供(gong)選擇(ze),例如(ru)不銹鋼、鋁合(he)金、玻璃纖維增強塑料等(deng)。選擇(ze)高質量的(de)(de)(de)液(ye)氮容(rong)(rong)器(qi)(qi)(qi)可以(yi)保證容(rong)(rong)器(qi)(qi)(qi)具有良好的(de)(de)(de)密(mi)封性(xing)和保溫(wen)(wen)(wen)性(xing)能(neng),從而減(jian)少液(ye)氮容(rong)(rong)器(qi)(qi)(qi)內外部(bu)溫(wen)(wen)(wen)差的(de)(de)(de)影(ying)響(xiang)。
二、正確使用液氮容器
正(zheng)確使(shi)用(yong)液氮(dan)容(rong)(rong)(rong)器是(shi)減少液氮(dan)容(rong)(rong)(rong)器內(nei)(nei)外部溫(wen)(wen)差的(de)關鍵。使(shi)用(yong)液氮(dan)容(rong)(rong)(rong)器時(shi),應(ying)該遵循容(rong)(rong)(rong)器制造商的(de)說(shuo)明書,正(zheng)確操作容(rong)(rong)(rong)器。例(li)如,在(zai)加入樣品或試(shi)劑前,應(ying)該將液氮(dan)容(rong)(rong)(rong)器放置在(zai)室溫(wen)(wen)下一段(duan)時(shi)間,使(shi)容(rong)(rong)(rong)器內(nei)(nei)外部溫(wen)(wen)度均勻。此外,液氮(dan)容(rong)(rong)(rong)器在(zai)使(shi)用(yong)過程(cheng)中(zhong)要防止(zhi)震動(dong)和碰(peng)撞(zhuang),以免容(rong)(rong)(rong)器受到損壞。如果液氮(dan)容(rong)(rong)(rong)器發現有損壞,應(ying)該立即(ji)停止(zhi)使(shi)用(yong),并及時(shi)更換新的(de)液氮(dan)容(rong)(rong)(rong)器。
三、保持液氮容器的密封性
保持(chi)液(ye)氮(dan)容器的密封性(xing)是減(jian)少液(ye)氮(dan)容器內外(wai)部(bu)溫差的關(guan)鍵(jian)。液(ye)氮(dan)容器的密封性(xing)對于保存(cun)低溫樣(yang)品和試劑至關(guan)重要(yao),因(yin)為液(ye)氮(dan)容器的密封性(xing)直接影響到容器內部(bu)的氣壓和溫度。因(yin)此,要(yao)確保液(ye)氮(dan)容器的密封性(xing)良(liang)好,可以采用(yong)以下措施:
1. 涂抹適當的硅膠密(mi)封劑,以(yi)確保(bao)液(ye)氮(dan)容(rong)器的密(mi)封性良好(hao)。
2. 定期檢查(cha)液氮容器的密封(feng)性,如發現有泄漏現象應立(li)即處理(li)。
3. 避(bi)免過度加裝液氮(dan),以免壓(ya)縮(suo)空(kong)氣導致容器內部氣壓(ya)升(sheng)高。
四(si)、合理組織液氮容(rong)器的(de)存(cun)放(fang)
合理組(zu)織液氮(dan)(dan)容(rong)器(qi)的存放(fang)是減(jian)(jian)少液氮(dan)(dan)容(rong)器(qi)內外部(bu)溫差的關鍵(jian)。在存放(fang)液氮(dan)(dan)容(rong)器(qi)時(shi),應(ying)(ying)(ying)避免(mian)直接(jie)接(jie)觸地面和金屬表面,以減(jian)(jian)少溫度傳遞。同時(shi),液氮(dan)(dan)容(rong)器(qi)之(zhi)間也應(ying)(ying)(ying)該保持一定的距離,以避免(mian)容(rong)器(qi)間的熱(re)傳遞。此外,液氮(dan)(dan)容(rong)器(qi)的存放(fang)位置應(ying)(ying)(ying)該遠離陽光直射和熱(re)源,以避免(mian)容(rong)器(qi)受到(dao)熱(re)量影(ying)響(xiang)。