首次采用质子转移反应飞行时间质谱仪进行涡度相关通量测量。
First eddy covariance flux measurements by PTR-TOF.
作者信息
Müller M, Graus M, Ruuskanen T M, Schnitzhofer R, Bamberger I, Kaser L, Titzmann T, Hörtnagl L, Wohlfahrt G, Karl T, Hansel A
机构信息
Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria ; Ionicon Analytik, Innsbruck, Austria.
Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria.
出版信息
Atmos Meas Tech. 2010 Mar 25;3(2):387-395. doi: 10.5194/amt-3-387-2010.
The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. The high time resolution of the PTR-TOF allowed storing full mass spectra up to 315 with a frequency of 10 Hz. Three isobaric ions were found at a nominal mass of 33 due to the high mass resolving power of the PTR-TOF. Only one of the three peaks contributed to eddy covariance fluxes. The exact mass of this peak agrees well with the exact mass of protonated methanol ( 33.0335). The eddy covariance methanol fluxes measured with PTR-TOF were compared to virtual disjunct eddy covariance methanol fluxes simultaneously measured with a conventional PTR-MS. The methanol fluxes from both instruments show excellent agreement.
对最近开发的质子转移反应-飞行时间（PTR-TOF）仪器进行了评估，以使用涡度相关法测量草地排放的甲醇通量。PTR-TOF的高时间分辨率允许以10Hz的频率存储高达315的完整质谱。由于PTR-TOF的高质量分辨能力，在标称质量33处发现了三个等压离子。这三个峰中只有一个对涡度相关通量有贡献。该峰的精确质量与质子化甲醇的精确质量（33.0335）非常吻合。将用PTR-TOF测量的涡度相关甲醇通量与用传统质子转移反应质谱（PTR-MS）同时测量的虚拟非连续涡度相关甲醇通量进行了比较。两种仪器测得的甲醇通量显示出极好的一致性。
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