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	<h1 class="NyNewsdetail_title">如何根据应用选择合适的滤膜材质</h1>
    <div class="NyNewsdetail_tips">更新时间：2020-08-24&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;点击次数：2045</div>
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    	<p>如何根据应用选择合适的滤膜材质</p><p>① 用作起泡点的测定:测定起泡点压力可以反映微孔滤膜的孔径大小,这与被滤过的药液质量密切相关,也是保证微孔滤膜质量的一种重要手段。使用的微孔滤膜应事先放在70℃左右的注射用水中浸泡1 h。将水倾出后再用温注射用水浸泡过夜备用。临用时取出,用注射用水淋洗干净,即可装入过滤器中使用,安装。时防止滤膜装歪泄漏。</p><p><img alt="" src="http://img49.hbzhan.com/2/20181114/636777909027291745736.jpg" style="height:410px; width:600px" /></p><p>② 为保护延长滤膜的使用寿命,可用同等大小的滤纸或绢绸布(应先用质量浓度20 g&middot;L - 1磺酸钠溶液煮沸绢绸布约30 min,然后用注射用水清洗干净)放在滤膜上,防止滤膜破裂。</p><p>③ 微孔滤膜之孔径为锥体状,光滑的一面孔径小为正面;粗糙的一面孔径大为反面,安装时应将正面朝下,反面朝上,否则易被杂质阻塞孔径,影响滤速。温度低时,应将处理好的滤膜放于与药液温度相同的注射用水中浸泡5～10 min,可避免因温差使滤膜抗拉强度降低而导致破裂现象。</p><p>④ 在滤器架的排气管的皮管头上,固定一个16号输液针头,用止水夹控制,可避免排气压力与速度过大致使滤膜破裂。</p><p>⑤ 不要将滤架连同滤膜一起进行灭菌,否则滤膜因热胀冷缩而致脆裂皱折。</p><p>⑥ 使用后,微孔滤膜放在注射用水中,防止干燥,但不要浸泡太久,对已失水干燥的微孔滤膜不能使用。</p><p>⑦ 根据药液的浓度与粘度大小,应选用不同孔径的微孔滤膜。</p><p>⑧ 若发现微孔滤膜有小洞孔或小裂缝时,可用原不用的破滤膜漂洗干净后烘干,然后撕碎放于少量丙酮的小杯中,搅拌成糊状粘液,将此粘液滴于平放滤膜的小洞孔或小裂缝处,不宜过多,粘液覆盖而稍大即可,挥干后则可继续使用而不影响</p>
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