Experiments were performed over an extended period of time
using a number of gas chromatographs, primarily Agilent 5890
(Santa Clara, CA, USA) and later Varian CP3800 (Mulgrave, Victoria,
Australia), all equipped with hydrogen/air flame ionisation detectors
(FID) at 260 C. Injectors were held at 260 C with 1 mL injection
volumes and a 1:1 split ratio