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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?；ぶ氖焙蜃龅讲挥跋旆掷敕治瞿兀空馐巧坠ぷ髡呔Ｃ媪俚囊桓鑫侍?。通常，样品是否清洁是我们在选择保护柱的时候首先要考虑的。根据分析工作者的经验可知，一只1cm长的?；ぶ湍芴峁┏浞值谋；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的保护柱，那么就应选择2cm或3cm长的保护柱。?；ぶ匠ぃ匀凰疤畹纳滋盍显蕉?，则其越能避免污染物进入分析色谱柱的机会。当然，随着?；ぶ某ざ燃映?，样品的保留时间会比使用短?；ぶぁＲ话憷此?，保护柱的内径与分析色谱柱的内径相同或相当即可。 </p> <p> ?；ぶ奶盍献疤罘绞揭彩茄≡癖；ぶ币悸堑闹匾蛩?。目前有两种填料方式： </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滋盍嫌邢蓿荒芴峁┖苡邢薜谋；ぷ饔?；不过也因为所装填的色谱填料较少，?；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ざ取Ｊ纸羰奖；ぶ咏峁股辖彩怯胫绷奖；ぶ谎?，只是在连接时不需要借助扳手等工具，直接用手上紧即可。另外从保护柱结构的角度看，保护柱的结构又分为是否可以更换?；ぶ?。现在大多数的?；ぶ梢愿槐；ぶ?，可以降低?；ぶ氖褂贸杀?。大多数人是根据色谱分析柱的填料选择?；ぶ奶盍?，正常情况下可以选择与分析色谱柱一样的色谱填料。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粜缘奶盍稀? </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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