Hello All Does anyone know where we can buy in the UK a replacement SUPELCO carrier gas purifier part number, 2-3801 for a TC/EA which is connected to a Delta XP? I have tried various suppliers including Sigma-Aldrich but no one replies. many thanks John John Hill Mass Spectrometry Facility University College London Chemistry Department 20 Gordon St. London WC1H 0AJ Tel: 020 7679 4605 Fax: 020 7679 7451