Differences in thermal conductivity between gas exiting the column versus pure carrier gas will cause the bridge circuit to unbalance, generating a voltage signal at the output of the operational amplifier circuit: This type of chromatograph detector works best, of course, when the carrier ...
The pollutant of interest in this experiment was atrazine (Figure 3); a common organochloride herbicide. Once the organic components of the soil were extracted and concentrated, they were analyzed by gas chromatography with a flame ionization detector (GC-FID). The GC analysis was carried out us...