A purge and trap sampling system for high sensitivity trace gas analysis

我们正在申请资金，以购买一个吹扫和捕集取样系统，用于分析海洋沃茨中的痕量气体。 拟议的仪器将与现有的气相色谱-质谱仪（GC-MS）结合使用，用于测量N2 O、CH 4和各种含硫气体，并用于分析同位素示踪实验的气体样品。 将在东北太平洋和其他各大洋区域（如南大洋）的海上收集气体样本，随后在实验室进行分析。 吹扫和捕集系统将用于提高我们目前的分析能力（基于静态顶空平衡技术），提供更高的灵敏度和更高的测量精度。 通过购买拟议的设备进行的研究将有助于更好地了解控制海洋沃茨中微量气体循环的化学和生物过程。 这项工作对理解全球气候系统具有重要意义，因为我们测量的气体会影响大气辐射平衡。 所要求的将被广泛用于各种各样的学生，博士后研究员和技术人员的培训，由此产生的测量将是中央的B Sc.，硕士和博士论文

We are requesting funds to purchase a purge and trap sampling system for the analysis of trace gases in oceanic waters. The proposed instrument will be used in conjunction with a currently existing gas chromatograph - mass spectrometer (GC-MS) for the measurement of N2O, CH4 and various sulfur gases, and in the analysis of gas samples from isotope tracer experiments. Gas samples will be collected at sea in the NE Pacific and in various other oceanic regions (e.g. Southern Ocean), and subsequently analyzed in the laboratory. The purge and trap system will be used to enhance our current analytical capabilities (based on a static headspace equilibration technique), providing much higher sensitivity and significantly greater measurement precision. The research enabled by the purchase of the proposed equipment will lead to a better understanding of the chemical and biological processes controlling trace gas cycling in oceanic waters. This work has implications for understanding the global climate system since the gases we measure influence the atmospheric radiative balance. The requested will be used extensively in the training of a wide variety of students, post-doctoral fellows and technicians, and the resulting measurements will be central to a significant number of B.Sc., M.Sc. and Ph.D. theses.