Abstract
A dual-beam Fourier transform infrared spectrometer (FT-IR) is described. Sensitivity improvement, photometric accuracy, and instrument stability are evaluated by comparing dual-beam spectra with conventional single-beam spectra. Dual-beam FT-IR data acquisitions require an order of magnitude less measurement time than single-beam acquisitions for spectra of comparable signal-to-noise ratios. Application of dual-beam FT-IR for analysis of a highly transmitting sample is discussed. Single fiber analysis without masking and without an infrared microscope is described.
Get full access to this article
View all access options for this article.
References
1.
Griffiths
P. R.
, in Chemical Infrared Fourier Transform Spectroscopy (Wiley-Interscience , New York , 1975 ).
2.
Fellgett
P.
, J. Phys. Rad. 19 , 237 (1958 ).
3.
Bar-Lev
H.
, Infrared Phys. 7 , 93 (1967 ).
4.
Coleman
I.
, J. Opt. Soc. Am. 56 , advertisement (1966 ).
5.
Hall
R.
Vrabec
D.
, and
Dowling
J.
, Appl. Opt. 5 , 1147 (1966 ).
6.
Kauppinen
J.
, Appl. Opt. 14 , 1987 (1975 ).
7.
Genzel
L.
and
Kuhl
J.
, Infrared Phys. 18 , 113 (1978 ).
8.
Vanasse
G. A.
Murphy
R. E.
, and
Cook
F. H.
, Appl. Opt. 15 , 290 (1976 ).
9.
Kuehl
D.
and
Griffiths
P. R.
, Anal. Chem. 50 , 418 (1978 ).
10.
Connes
J.
and
Connes
P.
, J. Opt. Soc. Am. 56 , 901 (1966 ).
11.
Beer
R.
Norton
R. H.
, and
Seaman
C. H.
, Rev. Sci. Instrum. 42 , 1393 (1971 ).
12.
Low
M. J. D.
, Anal. Lett. 1 , 819 (1968 ).
13.
Kuehl
D.
Kemeny
G. J.
, and
Griffiths
P. R.
, Appl. Spectrosc. 34 , 95 (1980 ).
14.
White
R.
, Appl. Spectrosc. 39 , 320 (1985 ).
15.
Burroughs
W. J.
and
Chamberlain
J.
, Infrared Phys. 11 , 1 (1971 ).
16.
deHaseth
J. A.
and
Isenhour
T. L.
, Anal. Chem. 49 , 1977 (1977 ).
17.
deHaseth
J. A.
, Appl. Spectrosc. 36 , 544 (1982 ).
18.
Bartick
E. G.
, Appl. Spectrosc. 39 , 885 (1985 ).