Flow Switching System utilizing gas pressure difference* Selective Sampler SS-2010E * Japanese Patent 3290893 With this device installed, any set of peaks in the Evolved Gas Analysis curve obtained by Multi-Shot Pyrolyzer or Thermogravimetry (TG) can be heart-cut, and solvent peaks and high-boiling species can also be removed. The technique also eliminates flow path contaminations with polar species, and tars on the metal surfaces which are the problems of conventional rotary valve systems, resulting in reduced analysis time and easy maintenance of separation column and detector. Heart-Cutting Desired Peaks Any set of peaks in an evolved gas curve can be heart-cut. The components can then be introduced into a capillary column for a specific analysis, allowing significant reduction of time required for analysis. New Flow Switching System (See the figure below) New Flow Switching System An inlet adaptor with a flow path switching system utilizing pressure difference of carrier gas has been employed. The flow path is made of deactivated Ultra ALLOY® capillary tube having no dead volume or cold spots. Automatic adjustment of purge gas pressure The system automatically adjusts the purge gas pressure against changes of the separation column length and its inner diameter Automatic Flow Switching The timing of flow path switching can be programmed from Multi-Shot Pyrolyzer temperature controller. Also flow path switching can be manually performed. Various atmosphere gases (He, Air, etc.) can be used Using air as a sample atmosphere gas gives thermal information under oxidative environment. Simple Construction with Easy Installation The installation is simple and easy. Just attach a selective sampler adaptor (SS adapter) to the split/splitless inlet. 【Flow Pass】 Sampling OFF Pyrolyzer Atmosphere gas (He/Air) Split vent GC Injector Flow Controller Valve (open) Capillary column Valve (clos

Application: Analysis of a paper surface sizing agent The EGA thermogram shown in Fig. 1 was obtained by the evolved gas analysis (EGA), in which when a paper sample was continuously heated to a higher temperature, the gases evolving from the paper sample were directly detected real time by a detector such as MSD. Peaks derived from the pyrolysis of the main component of paper are observed in Zone A, and peaks originating from the surface sizing agent of paper are observed in Zone B. Fig. 2-1 shows a pyrogram obtained by the conventional flash pyrolysis, but this method makes it very difficult...