Column preparation static coating

Thixotropic suspensions are generally required for static coating due to the long column preparation time. 

Usually ALOT columns can be prepared using dynamic or static coating techniques (classical methods, see, for example, [13, 14]). Static coating places considerable demands on adsorbent sus-... 

Preparation of high efficiency fused-silica capillary columns coated with graphitized carbon black impregnated with liquid phases was proposed by Bruner and co-workers [23, 24]. This method is a modification of that described by Xu and Vermeulen [25] (free release static coating) for the preparation of glass capillary columns. 

Preparation of the columns is based on a two-step procedure, namely 1) preparation of a slurry where the adsorbent (graphitized carbon black) and the liquid phase (for instance, SP-1000) are mixed together in a suitable solvent and sonicated 2) coating of the capillary columns by means of a static method using the prepared slurry. 

---