Problems with Gas Chromatography in Oklahoma

The state of Oklahoma uses gas chromatography to test blood samples for blood alcohol concentration in DUI cases. This article summarizes the chromatography process and some common problems with it that can be raised in court. What Is Gas Chromatography? Gas chromatography (GC) is a scientific test used to separate and analyze chemical compounds, such as alcohol molecules and blood. The test involves injecting a known volume of the driver’s blood into a narrow tube, called a column. The blood sample is swept through the tube by a stream of carrier gas, such as helium. The tube contains a device called a...

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