A tunable diode laser absorption spectrometer for formaldehyde atmospheric measurements validated by simulation chamber instrumentation

被引：19

作者：

Catoire, V. ^{[1
]}

Bernard, F. ^{[2
]}

Mebarki, Y. ^{[1
]}

Mellouki, A. ^{[2
]}

Eyglunent, G. ^{[2
]}

Daele, V. ^{[2
]}

Robert, C. ^{[1
]}

机构：

[1] Univ Orleans, CNRS, Observ Sci Univ Reg Ctr OSUC, Lab Phys & Chim Environm & Espace LPC2E,UMR 6115, 3A Ave Rech Sci, F-45071 Orleans 2, France

[2] Observ Sci Univ Reg Ctr OSUC, CNRS, Inst Combust Aerotherm Reactiv & Environm ICARE, UPR 3021, F-45071 Orleans 2, France

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2012年 / 24卷 / 01期

关键词：

formaldehyde; ethene ozonolysis; in situ measurements; stratosphere; simulation chamber; TDLAS; FT-IR; GAS-PHASE REACTIONS; IN-SITU MEASUREMENTS; STRATOSPHERIC FORMALDEHYDE; CARBONYL-COMPOUNDS; TECHNICAL NOTE; OZONE; OH; INTENSITIES; CHEMISTRY; N2O;

D O I：

10.1016/S1001-0742(11)60726-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A tunable diode laser absorption spectrometer (TDLAS) for formaldehyde atmospheric measurements has been set up and validated through comparison experiments with a Fourier transform infrared spectrometer (FT-IR) in a simulation chamber. Formaldehyde was generated in situ in the chamber from reaction of ethene with ozone. Three HCHO ro-vibrational line intensities (at 2909.71, 2912.09 and 2914.46 cm(-1)) possibly used by TDLAS were calibrated by FT-IR spectra simultaneously recorded in the 1600-3200 cm(-1) domain during ethene ozonolysis, enabling the on-line deduction of the varying concentration for HCHO in formation. The experimental line intensities values inferred confirmed the calculated ones from the updated HITRAN database. In addition, the feasibility of stratospheric in situ HCHO measurements using the 2912.09 cm(-1) line was demonstrated. The TDLAS performances were also assessed, leading to a 2 sigma detection limit of 88 ppt in volume mixing ratio with a response time of 60 sec at 30 Torr and 294 K for 112 m optical path. As part of this work, the room-temperature rate constant of this reaction and the HCHO formation yield were found to be in excellent agreement with the compiled literature data.

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页码：22 / 33

页数：12

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