Towards Realization of Reactive Gas Amount of Substance Standards Through Spectroscopic Measurements

Author

Chu, Pamela M. ; Nelson, David D. ; Zahniser, Mark S., Jr. ; McManus, Barry J. ; Shi, Quan ; Travis, John C.

Author_Institution

Nat. Inst. of Stand. & Technol., Gaithersburg, MD

Volume

56

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

305

Lastpage

308

Abstract

This paper discusses the use of high-precision direct absorption spectroscopy to realize the amount of substance standards for ozone (O ₃), a reactive species which cannot be delivered through traditional gravimetrically based gas cylinder standards. The O₃ amount of substance is linked to the known concentrations of nitric oxide (NO) and nitrogen dioxide (NO₂) through a gas-phase titration reaction and spectroscopic measurements using room-temperature pulsed quantum-cascade lasers. Ultimately, this approach will allow the determination of an O₃ transition line strength linked to the primary gravimetric standards of NO and NO ₂. The line strength can be used in future measurements to determine O₃ concentrations of unknown samples

Keywords

chemical variables measurement; density measurement; measurement standards; nitrogen compounds; ozone; spectrochemical analysis; direct absorption spectroscopy; gas reference standards; gas-phase titration reaction; nitric oxide; nitrogen dioxide; ozone; pulsed quantum-cascade lasers; reactive gas amount; spectroscopic measurements; substance standards; transition line strength; Absorption; Atmospheric measurements; Laser transitions; Measurement standards; NIST; Nitrogen; Optical pulses; Pollution measurement; Pulse measurements; Spectroscopy; Absorption spectroscopy; gas reference standards; ozone; traceability;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2007.891151

Filename

4126844