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/>市售的測油用萃取溶劑中難免會含有一些具有碳氫鍵的雜質(zhì)，這些雜質(zhì)對測量結(jié)果會有一定影響。所以，對于市售的萃取劑應先經(jīng)過純化處理才能用以萃取樣品中的油類物質(zhì)。對于顆粒狀的雜質(zhì)，用砂芯漏斗過濾即可除掉，但對于以分子形態(tài)分散在萃取劑中的污染物，則常常采用蒸餾法、精餾法和吸附法等方法予以去除。由于蒸餾法和精餾法，尤其是精餾法裝置龐大，操作煩瑣，并且潛在一定的安全隱患，同時，它們的純化效果也不理想，而吸附法裝置簡單，操作簡便，提純效果好，成本低，所以采用吸附法提純萃取劑。<br />吸附法zui常用的吸附劑是活性炭，但市售的活性炭仍然存在一定的有機雜質(zhì)，需在2500C高溫加熱2小時，冷卻后裝入吸附柱即可使用。<br />二、回收利用方法<br />由于萃取劑都對環(huán)境及人體具有一定的危害，如果直接將其排放到環(huán)境中，將對環(huán)境造成 “二次污染”，同時也造成了較大的資源浪費。因此，應設法將其回收和循環(huán)利用。萃取劑的回收方法與萃取劑的純化基本相同，采用吸附法，吸附劑也可采用經(jīng)過活化的活性炭。</span></span></p> </div> <div id="pfpxjn55" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-1222561.html">紅外測油儀測量用玻璃器皿及試劑的檢驗</a></li> <li>下一篇：<a href="/Article-1222558.html">測油儀標準溶液的配制</a></li> </ul> </div> </div>   <div id="pfpxjn55" class="ly_foot"> <div id="pfpxjn55" class="ly_Ftmain"> <div id="pfpxjn55" class="ly_FtLeft"> <div id="pfpxjn55" class="Ft_nav"><a href="/">首頁</a><a href="/aboutus.html" rel="nofollow">關于我們</a><a href="/products.html">產(chǎn)品展示</a><a 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