KN-1945 GC for Analysis of Natural Gas

Introduction:

Components in a representative sample are physically separated by gas chromatography (GC) and compared to calibration data obtained under identical operating conditions from a reference standard mixture of known composition. The numerous heavy-end components of a sample can be grouped into irregular peaks by reversing the direction of the carrier gas through the column at such time as to group the heavy ends either as C₅ and heavier, C₆ and heavier, or C₇ and heavier. The composition of the sample is calculated by comparing either the peak heights, or the peak areas, or both, with the corresponding values obtained with the reference standard.

Introduction:

KN-1945 GC for Analysis of Natural Gas conforms to ASTM D1945 Standard Test Method for Analysis of Natural Gas by Gas Chromatography. It can analyze the chemical composition of natural gases and similar gaseous mixtures.

Configuration:

6-valve, 2-column (packed), TCD

Sample type:

Natural gas

Components separated:

Isobutane, n-butane, isopentane, n-pentane, carbon dioxide, ethane, hydrogen sulfide, n-propane, argon/oxygen composite, nitrogen, methane

Lower detection limits:

100ppm for most components, 400ppm for propane, 500ppm for hydrogen sulfide

Chromatogram