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<div id="pwutwdmpxr" class="mbao"> <a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 有機(jī)過濾器濾膜的常用過濾材料特性 <a href="/order.html" class="order"></a> </div> <div id="pwutwdmpxr" class="w clearfix btop"> <div id="pwutwdmpxr" class="news_c_right news_c_right2 news_c_right3"> <div id="pwutwdmpxr" class="news_list ny_news_list"> <div id="pwutwdmpxr" class="detail"> <h1 class="tlt">有機(jī)過濾器濾膜的常用過濾材料特性</h1> <div id="pwutwdmpxr" class="info"> <span>更新時(shí)間：2023-02-17</span> <p>閱讀：954</p> </div> <div id="pwutwdmpxr" class="conn" id="c_detail_wrap"> <div>　　<strong><a href="http://adkcd.com/Products-36360983.html" target="_blank">有機(jī)過濾器</a></strong>是化學(xué)實(shí)驗(yàn)室常用設(shè)備，用于液相色譜分析中的流動(dòng)相的過濾及除氣，對于延長儀器和色譜柱的使用壽命、提高檢測精度起著關(guān)鍵的作用，有機(jī)過濾器配以不同用途的過濾膜已廣泛應(yīng)用在重量分析、微量分析、色譜分析、膠體分離及無菌試驗(yàn)中。</div><div> </div><div>　　它主要用于高效液相色譜流動(dòng)相過濾、粒子物質(zhì)分析和微生物污染檢測。它們是化學(xué)實(shí)驗(yàn)室常備器材。選用優(yōu)質(zhì)硼酸鹽玻璃或316L衛(wèi)生級不銹鋼為材質(zhì)，可在分析中過濾各種水溶液、機(jī)物和腐蝕性液體，并可進(jìn)行121℃熱壓消毒處理。</div><div> </div><p style="text-align: center;"><img src="https://img66.chem17.com/9/20230217/638122411193369555768.jpg" width="545" height="313" align="middle" alt="" /></p><p> </p><div>　　有機(jī)過濾器濾膜的常用過濾材料特性：</div><div>　　1、聚四氟乙烯膜：</div><div>　　采用天然疏水的PTFE材質(zhì)，即使在很低的壓差下，也能保證潮濕空氣或其它氣體通行無阻，而水溶液則不能透過。其性能與親水膜正好相反。PTFE濾膜具有較好的化學(xué)兼容性，幾乎能勝任所有的有機(jī)溶劑和強(qiáng)腐蝕化學(xué)品的過濾。在必須用PTFE濾膜過濾水相溶液時(shí)，必須先用乙醇或異丙醇預(yù)浸潤后，水相溶液才能濾過。</div><div> </div><div>　　2、玻璃纖維預(yù)濾膜：</div><div>　　用于提高過濾通過率和連續(xù)過濾；玻璃纖維濾膜屬于深層過濾，其主要用途是作為預(yù)過濾層，直接加在過濾膜上使用。</div><div> </div><div>　　3、尼龍濾膜：</div><div>　　用于堿性溶液和有機(jī)溶劑過濾。尼龍膜具有非常好的機(jī)械強(qiáng)度，吸附性強(qiáng)，能耐受大多數(shù)有機(jī)溶劑和多數(shù)堿性溶液，特別適合于堿性溶液的過濾。用于有機(jī)溶劑過濾，如HPLC流動(dòng)相除顆粒過濾時(shí)，尼龍膜比PTFE膜更經(jīng)濟(jì)實(shí)用，另外尼龍膜還可以作為轉(zhuǎn)印膜。由于尼龍膜的吸附性能相對較高，一般不推薦用于培養(yǎng)基過濾、或蛋白液等生物樣品的過濾，以免因吸附而損失樣品。在這種情況下通常采用低吸附的醋酸纖維素膜(CA)更為適用。</div><div> </div><div>　　4、PVDF膜：</div><div>　　有好的耐熱性和化學(xué)穩(wěn)定性。在室溫下不被酸、堿、強(qiáng)氧化劑和鹵素所腐蝕，對脂肪烴、芳香烴、醇、醛等有機(jī)溶劑穩(wěn)定。親水性PVDF因蛋白吸附量低析出物少，廣泛應(yīng)用于生物制藥中的除菌過濾，帶正電荷PVDF可以用來除內(nèi)毒素。</div> </div> </div> <div id="pwutwdmpxr" class="artview_prev_next"> <div id="pwutwdmpxr" class="left">上一篇：<a href="/Article-3291011.html">關(guān)于凈氣通風(fēng)柜的應(yīng)用原理和優(yōu)勢，以下有詳細(xì)說明</a></div> <div id="pwutwdmpxr" class="right">下一篇：<a href="/Article-3250320.html">分享！化學(xué)品儲(chǔ)存柜現(xiàn)場安全管理要求</a></div> </div> </div> </div> </div>  <div class="pwutwdmpxr" id="z_Footer"> <div id="pwutwdmpxr" class="pz_down"> <div id="pwutwdmpxr" class="w"> <div id="pwutwdmpxr" class="footT"> <div 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