North America  Products available: Pyrolyzers and peripherals Consumables Ultra ALLOY Columns  Chromatographic Specialties Inc.    URL : http://www.chromspec.com/  Quadrex Corp.    URL : http://www.quadrexcorp.com/  Quantum Analytics Inc.    URL : http://www.lqa.com/  Shimadzu Scientific Instruments Inc.    URL : http://www.ssi.shimadzu.com/