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       <h1 class="ny_newsdetail_title">四种常见移液器</h1>
       <div class="ny_newsdetail_tips">更新时间：2014-09-15&nbsp;&nbsp;|&nbsp;&nbsp;点击率：3004</div>
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          <strong><a href="http://www.shzm17.com/">&nbsp;<span style="font-family: 宋体; font-size: 10.5pt;">移液器</span></a></strong><span style="font-family: 宋体; font-size: 10.5pt;">的种类：</span><p class="p0" style="text-indent:21.0000pt; margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">1滴管</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="text-indent:21.0000pt; margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">使用方便，可用于半定量移液，其移液量为1mL～5mL，常用2mL，可换不同大小的滴头。滴管有长、短两种，新出的一种带刻度和缓冲泡的滴管，可以比普通滴管更准确地移液，并防止液体吸入滴头。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">2移液管(吸管)</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">吸管使用前应洗至内壁不挂水珠，1mL以上的吸管用吸管刷刷洗，0.1mL、0.2mL和0.5mL的吸管可用洗涤剂浸泡，必要时可以用超声清洗器清洗。由于铬酸洗液致癌，应尽量避免使用。若有大量成批的吸管洗后冲洗，可使用冲洗桶，将吸管向上置于桶内，用自来水多次冲洗后再用蒸馏水或无离子水冲洗。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">吸管分为两种，一种是无分度的，称为大肚吸管，度较高，其相对误差*为0.7％~0.8％，B级为1.5％~0.16％，液体自标线流至口端(留有残液)，*等待15s，B级等待3s。另一种吸管为分度吸管，管身为一粗细均匀的玻璃管，上面均匀刻有表示容积的分度线，其准确度低于胖肚吸管，相对误差*为0.8％～0.2％，B级为1.6％～0.4％，*、B级在吸管身上有A、B字样，有&rdquo;快&rdquo;字则为快流式，有&rdquo;吹&rdquo;字则为吹出式，无&rdquo;吹&rdquo;字的吸管不可将管尖的残留液吹出。吸、放溶液前要用吸水纸擦拭管尖。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">3微量进样器</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">微量进样器常用作气相和液相色谱仪的进样器，在生化实验中主要是用作电泳实验的加样器，通常可分为无存液和有存液两种。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">(1)10&mu;L以下的极微量液体进样。无存液微量进样器：进样器的不锈钢芯子直接通到针处，不会出现存液。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">(2)10&mu;L～100&mu;L有存液微量进样器：不锈钢的针尖管部分是空管，进样器的柱塞不能到达，因而管内会存有空气或液体，其使用注意事项是：&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">①不可吸取浓碱溶液，以免腐蚀玻璃和不锈钢零件；&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">②因为有存液，所以吸液时要来回多拉几次，将针尖管内的气泡全部排尽；&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">③针尖管内孔极小，使用后尤其是吸取过蛋白质溶液后，必须立即清洗针尖管，防止堵塞。若遇针尖管堵塞，不可用火烧，只能用&phi;0.1mm的不锈钢丝耐心串通；&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">④进样器未润湿时不可来回干拉芯子，以免磨损而漏气；&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">⑤若进样器内发黑，有不锈钢氧化物，可用芯子蘸少量肥皂水，来回拉几次即可除之。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">4自动取液器</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">这种取液器在生化实验中大量地使用，它们主要用于多次重复的快速定量移液，可以只用一只手操作，十分方便。移液的准确度(即容量误差)为&plusmn;(0.5％～1.5％)，移液的精密度(即重复性误差)更小些，为&le;0.5％。取液器可分为二种：一种是固定容量的，常用的有100&mu;L等多种规格。每种取液器都有其的聚丙烯塑料吸头，吸头通常是一次性使用，当然也可以超声清洗后重复使用，而且此种吸头还可以进行120℃高压灭菌；另一种是可调容量的取液器，常用的有200&mu;L、500&mu;L和1000&mu;L等几种。可调式自动取液器的操作方法是用拇指和食指旋转取液器上部的旋钮，使数字窗口出现所需容量体积的数字，在取液器下端插上一个塑料吸头，并旋紧以保证气密，然后四指并拢握住取液器上部，用拇指按住柱塞杆顶端的按钮，向下按到*停点，将取液器的吸头插入待取的溶液中，缓慢松开按钮，吸上液体，并停留1～2秒钟(粘性大的溶液可加长停留时间)，将吸头沿器壁滑出容器，用吸水纸擦去吸头表面可能附着的液体，排液时吸头接触倾斜的器壁，先将按钮按到*停点，停留一秒钟(粘性大的液体要加长停留时间)，再按压到第二停点，吹出吸头尖部的剩余溶液，如果不便于用手取下吸头，可按下除吸头推杆，将吸头推入废物缸。</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">自动取液器的使用注意事项是：&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">①吸取液体时一定要缓慢平稳地松开拇指，绝不允许突然松开，以防将溶液吸入过快而冲入取液器内腐蚀柱塞而造成漏气。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">②为获得较高的精度，吸头需预先吸取一次样品溶液，然后再正式移液，因为吸取血清蛋白质溶液或有机溶剂时，吸头内壁会残留一层&rdquo;液膜&rdquo;，造成排液量偏小而产生误差。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">③浓度和粘度大的液体，会产生误差，为消除其误差的补偿量，可由试验确定，补偿量可用调节旋钮改变读数窗的读数来进行设定。&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p><p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; ">④可用分析天平称量所取纯水的重量并进行计算的方法，来校正取液器，1mL蒸馏水20℃时重0.9982g。</span><span style="mso-spacerun:'yes'; font-size:10.5000pt; font-family:'宋体'; "><o:p></o:p></span></p>
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