Purge and Trap for Autosamplers and Gas Chromatography1601069

Gas Chromatography (GC) is used to evaluate compounds that may be vaporized without decomposing. To investigate these compounds, a gas chromatograph requires an autosampler whose injection mechanism meets the demands from the analysis. When 'abnormal' amounts of Volatile Organic Compounds (VOCs) or aroma compounds must be analyzed, a purge and trap autosampler will be the optimal choice.

The Purge and Trap Process Purge and trap autosamplers are capable of detecting compounds at the smallest parts per billion (ppb) levels, hence their value for detecting dangerous compounds such as volatile organic, or aroma compounds that may customize the taste or scent of an product. To prepare a specimen for chromatographic analysis, a purge and trap autosampler performs the subsequent process: Bubbles carry gas with the sample to release the compounds Sequesters the compounds in the concentrator Vaporizes the compounds by heating the concentrator The vaporized compounds pass through the concentrator to the column-a variety of cylindrical tubing housed inside the column oven in the chromatograph-then they get through to the detector, where they are analyzed. If the analysis is completed, the final results are displayed on a knowledge interface, and is printed using a chart recorder. Selecting the most appropriate automatic liquid sampler and trap for Gas Chromatography is a crucial component for your analysis of low-level compounds. Due to essential nature in the application, choosing an autosampler with the right capabilities is an important concern. When researching autosamplers that have a purge and trap concentrator, researchers look at the following criteria prior to making a purchase: Mechanical robustness- When laboratories process large volume samples, they need an autosampler whose technology can withstand the pains from the sample injection process. Analytical ability- When selecting an autosampler for the detection of low-level compounds, the key is to pick one that decreases the possibility of carryover between samples whenever you can. Productivity- In purge and trap autosamplers, high productivity is defined by a dual concentrator mode that accommodates liquid and soil samples, and positioning for any large numbers of liquid and soil samples. Simplicity of use- A user-friendly interface, intelligent software, and handy remote control typify an autosampler that is simple to operate. Simplicity of maintenance- On-board diagnostic checks, on-board real-time flow diagrams, and an error tracking and sample log make an autosampler easy to maintain. When an autosampler receives high marks in each of the categories, it is considered superior to your competitors. Conclusion Gas Chromatography is liable for the protection and excellence of various substances, from commercial sodas to natural pond water. To detect low levels of volatile organic compounds or other compounds during these substances, a gas chromatograph needs an autosampler which includes a purge and trap concentrator. In many instances, researchers pick the autosampler based on the criteria above, and quite often consider buying it used to save money.