Morning, I've checked the archives and talked to some folks concerning the syringe cleaning procedure for the H/Device. Isogeochem archives came up with ethylacetat, methanol and aceton. Any recomendations for the solvent and purity? regards, Robert -- Dr. Robert van Geldern Leibniz Institute for Applied Geosciences (GGA) S3: Geochronology and Isotopehydrology Stilleweg 2, 30655 Hannover, Germany phone: +49-(0)511-643-2313 (office), -2539 (lab) fax: +49-(0)511-643-3665 mailto:[log in to unmask]