雨飞扬
第4楼2009/04/09
IEC文件中定义衬管清洗方法:
Liners should be deactivated as follows: Take a commercially available, factory-deactivated liner (split/splitless single-taper with glass wool at the bottom) and immerse it in 5 % dimethyldichlorosilane in dichloromethane (DMDCS) or toluene for 15 minutes. Pick it up with forceps and drain and immerse it three times in the DMDCS to make sure the glass wool has been thoroughly covered and flushed. Drain once more and blot the residue solution onto a clean wiper. Immerse the liner in methanol for 10 to 15 minutes, and again drain/immerse three times. Rinse it inside and out with methanol from a squeeze bottle, followed by dichloromethane from a squeeze bottle. Transfer the liner to a vacuum oven purged with nitrogen and dry it at 110 °C for at least 15 minutes. Once dry it is ready for use.
(新增)衬管需按照下列步骤失活:取工业失活过的商品衬管(底端有玻璃毛的单锥形分流/不分流衬管),浸泡于5%DMCS溶液(使用二氯甲烷或甲苯等溶剂)15min,取出淋干,重复以上步骤3次以保证玻璃毛完全被覆盖,将淋干的玻璃衬管用甲醇浸泡10~15min,取出淋干,重复此步骤三遍;用盛装在石英玻璃器皿中的甲醇冲洗衬管的内外壁,之后用二氯甲烷冲洗,最后将玻璃衬管、玻璃毛放在真空炉中用N2吹干,110℃下加热至少15min,保存在盛有硅胶等干燥剂的密闭容器中。