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GC is a high-resolution method for separating volatile and semi-volatile compounds. The gas mixtures are separated based on the differences in component distribution between a stationary phase (e.g. inner coating of a capillary) and a mobile phase (purge gas, e.g. helium). Since this gas separation in the GC column takes a certain amount of time – the duration of which depends upon sample characteristics, column flow rate, column length, and stationary and mobile phase – it is not possible to couple directly into the GC with a continuous online sample gas flow. Our solution, therefore, was to develop a direct coupling in a quasi continuous mode by using heated automatic valves, which allows for software-controlled gas sampling (flow-through sampling loop) and gas injection even at short intervals.
For GC-MS coupling, we rely on the world-renowned supplier, Agilent, along with our partner, Joint Analytical Systems (JAS). This allows for perfect GC-MS supply and service quality, as we at NETZSCH expect of any entity with which we do business, in order to guarantee optimized performance for our own products.