title: A new technique for stripping of polyimide coating from fused-silica capillaries.
abstract: A novel method for the manufacture of detection windows in polyimide-coated fused-silica capillary columns is described. Concentrated fuming nitric acid at room temperature is utilized for stripping of the coating from a defined section of the capillary. The technique is particularly suitable for columns that have a heat sensitive coating on the inner wall or for columns that contain an immobilized hydrogel sieving-matrix. A column holder for the simultaneous preparation of detection windows in an array of more than 100 capillaries is also reported.
authors.affiliation: Royal Institute of Technology, Department of Analytical Chemistry, Stockholm, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Lindberg
authors.forename: J
authors.initials: J
authors.lastname: Roeraade
mesh_terms: D019075:Electrophoresis, Capillary / Q000295:instrumentation*; D006878:Hydroxides; D007094:Imides; D011108:Polymers; D011138:Polytetrafluoroethylene; D017680:Potassium Compounds; D012822:Silicon Dioxide
chemical_list: D006878:Hydroxides; D007094:Imides; D011108:Polymers; D017680:Potassium Compounds; D012822:Silicon Dioxide; D011138:Polytetrafluoroethylene; C029943:potassium hydroxide