Dear All, Does anyone have any experience in using General Valve's commercial slit nozzle source (dimensions: length=12.5mm x width=100um)? We have been having a great deal of difficulty with ours (any signal seems to die very rapidly as one moves away from the exit of the nozzle) and would like to hear from anyone that has used one of these successfully (or anyone using slit sources who can offer any useful advice). Thanks in advance, Martyn ---------------------------------------------- Dr. Martyn D. Wheeler Department of Chemistry University of Leicester University Road Leicester, LE1 7RH, UK. Tel (office): +44 (0)116 252 3985 Tel (lab): +44 (0)116 252 2115 Fax: +44 (0)116 252 3789 Email: [log in to unmask] http://www.le.ac.uk/chemistry/staff/mdw10.html