Abstract
A photoacoustic spectroscopic (PAS) and a direct optical absorption spectroscopic (OAS) gas sensor, both using continuous-wave room-temperature diode lasers operating at 1531.8 nm, were compared on the basis of ammonia detection. Excellent linear correlation between the detector signals of the two systems was found. Although the physical properties and the mode of operation of both sensors were significantly different, their performances were found to be remarkably similar, with a sub-ppm level minimum detectable concentration of ammonia and a fast response time in the range of a few minutes.
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References
1.
Ramis
G.
Yi
L.
Busca
G.
, Catal. Today 28 , 373 (1996 ).
2.
Linnerud
I.
Kaspersen
P.
Jaeger
T.
, Appl. Phys. B 67 , 297 (1998 ).
3.
Rooth
R. A.
Verhage
A. J. L.
Wouters
L. W.
, Appl. Opt. 29 , 3643 (1990 ).
4.
Narasimhan
L. R.
Goodman
W.
Patel
C. K. N.
, www.pnas.org/cgi/doi/10.1073/pnas.071057598.
5.
Fehér
M.
Martin
P. A.
, Spectrochim. Acta, Part A 51 , 1579 (1995 ).
6.
Mohácsi
Á.
Szakáll
M.
Bozóki
Z.
Szabó
G.
Bor
Z.
, Laser Physics 10 , 378 (2000 ).
7.
8.
Webber
M. E.
Baer
D. S.
Hanson
R. K.
, Appl. Opt. 40 , 2031 (2001 ).
9.
Liang
G.
Liu
H.
Kung
A. H.
Mohácsi
A.
Miklós
A.
Hess
P.
, J. Phys. Chem. A 104 , 10179 (2000 ).
10.
Bozóki
Z.
Sneider
J.
Gingl
Z.
Mohácsi
Á.
Szakáll
M.
Bor
Z.
Szabó
G.
, Meas. Sci. Technol. 10 , 999 (1999 ).
11.
Sigrist
M. W.
, Air Monitoring by Spectroscopic Techniques (John Wiley and Sons , New York , 1994 ).
12.
Fehér
M.
Martin
P. A.
Rohrbacher
A.
Soliva
A.
Maier
J. P.
, Appl. Opt. 32 , 2028 (1993 ).
13.
Fehér
M.
Jiang
Y.
Maier
J. P.
Miklós
A.
, Appl. Opt. 33 , 1655 (1994 ).
14.
Schäfer
S.
Mashni
M.
Sneider
J.
Miklós
A.
Hess
P.
Ebert
V.
Pleban
K.-U.
Pitz
H.
, Appl. Phys. B 66 , 511 (1998 ).
15.
Claps
R.
Englich
F. V.
Leleux
D. P.
Richter
D.
Tittel
F. K.
Curl
R. F.
, Appl. Opt. 40 , 4376 (2001 ).
16.
Miklós
A.
Hess
P.
Mohácsi
Á.
Sneider
J.
Kamm
S.
Schäfer
S.
, Photoacoustic and Photothermal Phenomena: 10th International Conference ,
Scudieri
F.
Bertolotti
M.
, Eds. (American Institute of Physics , Woodbury, New York , 1999 ), p. 126 .
17.
Miklós
A.
Hess
P.
Bozóki
Z.
, Rev. Sci. Instrum. 72 , 1937 (2001 ).
18.
McManus
J. B.
Kebabian
P. L.
Zahniser
M. S.
, Appl. Opt. 34 , 3336 (1995 ).
19.
Nagele
M.
Sigrist
M. W.
, Appl. Phys. B 70 , 895 (2000 ).
20.
Schmohl
A.
Miklós
A.
Hess
P.
, Appl. Opt. 40 , 2571 (2001 ).
21.
Szakáll
M.
Bozóki
Z.
Kraemer
M.
Spelten
N.
Moehler
O.
Schurath
U.
, Environ. Sci. Technol. 35 , 4881 (2001 ).
22.
Krämer
L.
Bozóki
Z.
Niessner
R.
, Anal. Sci. 17 , 563 (2001 ).