The gases in gold tubes were collected and quantified by a Toepler mercury pump, and then were sent into a gas chromatogaph to make compositional analysis.

• 金管中的气体经托普勒汞泵收集定量后送入气相色谱仪进行成分分析,剩余的气体经收集、转移后进行碳同位素分析。