Then, a 1 mL gas sample was taken from the head space through a rubber septum and injected into the gas chromatograph (Agilent p200 micro GC, Santa Clara, CA, USA) equipped with dual columns and a thermal conductivity detector.
Then, a 1 mL gas sample was taken from the head space through arubber septum and injected into the gas chromatograph (Agilentp200 micro GC, Santa Clara, CA, USA) equipped with dual columnsand a thermal conductivity detector.