Evaluation of a field-deployable Nafion™-based air-drying system for collecting whole air samples and its application to stable isotope measurements of CO2
Dipayan Paul,Hubertus A. Scheeren,Henk G. Jansen,Bert A. M. Kers,John B. Miller,Andrew M. Crotwell,Sylvia E. Michel,Luciana V. Gatti,Lucas G. Domingues,Caio S. C. Correia,Raiane A. L. Neves,Harro A. J. Meijer,and Wouter Peters
For reliable measurements of CO2 mole fractions and its stable isotope composition in air samples, one needs to carefully dry them during collection. Here we describe evaluation of a portable, consumable-free and power-free Nafion-based drying system that is currently being used for sample collection over the Amazon. Laboratory tests indicate that this Nafion-based system does not influence the mole fraction measurements of CH4, CO, N2O, SF6, and CO2 and the stable isotope composition of CO2.
For reliable measurements of CO2 mole fractions and its stable isotope composition in air...