Natural gas is bought and sold as a bulk commodity with price based on its energy content. It is very important to accurately determine the heating value/calorific value of natural gas as well as quantify individual components of the streams. The Agilent Micro GC Natural Gas Analyzer (NGA) is a 2 channel, multi-dimensional system based on the 490 Micro GC. Each channel includes a micro-machined capillary column, and thermal conductivity detector enabling very fast analysis cycle times (typically less than 60 seconds). When paired with the 490-PRO Micro GC, the in-board data handling software can analyze natural gas and provide all key parameters (ISO 6976, ASTM D3588, GPA 2286 and GPA 2172) around the clock in autonomous operation.