This document discusses leak testing in the headspace sampler (HS). Chromatographic symptoms such as loss of sensitivity can result from leaks and restrictions. Use the following set of tests for verifying leaks and restrictions within the HS. Verify that the GC is leak free before checking for leaks within the HS.
The document outlines a general procedure for verifying leaks in the Agilent 7697A Headspace Sampler system. It categorizes potential leak points into three areas: external connections (gas supply, regulator), GC interface points, and internal HS components like the six-port valve and transfer line. The guide emphasizes checking these areas sequentially to ensure instrument integrity.
The system should be considered in three parts: external leak points, GC leak points, and HS leak points.
The kit includes a no hole ferrule, 11 mm low bleed septa, a headspace blue leak test vial, a nylon tube fitting plug, and a stainless steel ZDV plug.
If the test fails, correct the problem identified by the failure code or reading, then re-run the test until it completes successfully.