Markes International is a multi-award-winning specialist manufacturer of instrumentation for the detection of trace-level volatile and semi-volatile organic compounds (VOCs and SVOCs) in solids, liquids and gases. Markes has a well-deserved reputation for its application expertise in the field of sample preparation (thermal desorption, SPME, headspace and high-capacity sorptive extraction) and supplying a comprehensive range of instruments, sampling equipment and supplies that enhance the analytical capability of GC–MS. Markes’ systems are sold worldwide, through its own global offices and network of distributors. Its customers encompass research, government and industrial/service laboratories, in a wide range of sectors from environmental monitoring to materials testing, and food & beverage analysis. Markes International is part of the Schauenburg Analytics Ltd group of companies.