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The 7697A Headspace Sampler introduces volatile compounds into the GC or GC/MS from virtually any sample matrix. Automatic leak check, priority sample positions, and barometric pressure compensation improve uptime, efficiency, and performance.
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Headspace sampling is a type of sample introduction technique for gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). For headspace techniques, the gas layer, or the headspace above the sample in a vial, is analyzed as opposed to withdrawing a volume from within the sample layer (Figure 1).
Headspace sampling is essentially a separation technique in which volatile material may be extracted from a heavier sample matrix and injected into a gas chromatograph for analysis. To appreciate the principle, let’s consider an application that is well suited for headspace sampling: perfume.
1 de oct. de 2011 · Headspace sampling (HS) keeps sample residues from entering the GC inlet by holding the entire sample matrix in a vial while transferring volatile components into the GC inlet and column. Nonvolatile contaminants remain behind in the headspace vial and do not accumulate in the inlet or the column.
1 de mar. de 2012 · Three Steps. Modern autosamplers that perform equilibrium headspace sampling enact three fundamental steps for sample injection: equilibration, pressurization and sample transfer. Each sampler model supplements these three with additional nuances and enhancements.
Headspace GC is a sample preparation method for determining volatile compounds in solid and liquid samples. The technique has existed since the late 1950s [12] and is still actively used. With this technique, only the gas phase above the sample is introduced into the GC column.
