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<li id="sssawse2" class="current_location_2">色谱知识</li> </ul></div> <div id="sssawse2" class="sublanmu_box sublanmu_box_729" id="sublanmu_box"> <div id="sssawse2" class="sublanmu_content" id="sublanmu_content"> <div id="sssawse2" class="articleinfor" id="articleinfor"> <ul> <li id="sssawse2" class="title"><h1>?；ぶ难≡裨? </h1></li> <li id="sssawse2" class="info"> 发布日期：2019-08-07 浏览量：<span id="clicks"></span> 字号：[ <a href="javascript:FontZoom('16px','Content')">大</a> <a href="javascript:FontZoom('14px','Content')">中</a> <a href="javascript:FontZoom('12px','Content')">小</a>] </li> </ul> <div id="sssawse2" class="content" id="Content"> <p> 怎样在选择保护柱的时候做到不影响分离分析呢？这是色谱工作者经常面临的一个问题。通常，样品是否清洁是我们在选择?；ぶ氖焙蚴紫纫悸堑?。根据分析工作者的经验可知，一只1cm长的保护柱就能提供充分的?；ぷ饔?。但是，假如样品非常不清洁，或工作中发现要经常更换1cm的?；ぶ?，那么就应选择2cm或3cm长的保护柱。保护柱越长，自然所装填的色谱填料越多，则其越能避免污染物进入分析色谱柱的机会。当然，随着保护柱的长度加长，样品的保留时间会比使用短?；ぶ?。一般来说，?；ぶ哪诰队敕治錾字哪诰断嗤蛳嗟奔纯伞? </p> <p> ?；ぶ奶盍献疤罘绞揭彩茄≡癖；ぶ币悸堑闹匾蛩亍Ｄ壳坝辛街痔盍戏绞剑? </p> <p> （1）薄膜装填法的?；ぶ?，使用过程很简单方便，而且可以在实验室中进行干装。但是，其最大的缺点是不经济，特别是针对中国的具体情况，一次性使用相对费用较高。另外，薄膜装填法的?；ぶ疤畹纳滋盍嫌邢?，只能提供很有限的?；ぷ饔茫徊还惨蛭疤畹纳滋盍辖仙?，?；ぶ某ざ纫步隙?，所以对分析样品的保留时间的影响也很小。 </p> <p> （2）还有一种?；ぶ峁蛊涫抵适撬醵塘说纳追治鲋?，设计方式上有直连式、手紧式或整体式。整体式设计是由色谱柱的生产厂商直接安装在色谱分析柱上的，必须与色谱分析柱一同订货，可以非常方便地使用，但不能够被修改。直连式结构设计可在任何时候由色谱工作者来安装连接，可以与任何品牌的色谱分析柱连接使用，而且还可以根据样品的相关情况选择不同的?；ぶざ?。手紧式?；ぶ咏峁股辖彩怯胫绷奖；ぶ谎皇窃诹邮辈恍枰柚馐值裙ぞ?，直接用手上紧即可。另外从?；ぶ峁沟慕嵌瓤?，?；ぶ慕峁褂址治欠窨梢愿槐；ぶ?。现在大多数的保护柱均可以更换?；ぶ荆梢越档捅；ぶ氖褂贸杀尽４蠖嗍耸歉萆追治鲋奶盍涎≡癖；ぶ奶盍希Ｇ榭鱿驴梢匝≡裼敕治錾字谎纳滋盍?。但是，根据实际的分析工作，也可不必与分析色谱柱的填料完全相匹配。 </p> <p> 总之，对于选择?；ぶ脑蚴牵涸诼惴治龇掷胍蟮那疤崽跫?，尽可能地选择较短的?；ぶ峁梗】赡苎≡穸苑掷胙沸∫恍┍Ａ粜缘奶盍?。 </p> </div> </div> <script src="/e/js/internal_page.js" type="text/javascript"></script> <ul class="sublanmu_pn"> <li>上一篇：<a href="/index.aspx?lanmuid=63&sublanmuid=729&id=1016">液相常见问题解决</a></li> <li>下一篇：<a href="/index.aspx?lanmuid=63&sublanmuid=729&id=1018">色谱柱常见问题解答</a></li> </ul> <script type="text/javascript">Get_Info("article","1017")</script> </div></div></div> </div> 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