Page 287 - Handbook of Instrumental Techniques for Analytical Chemistry

Infrared Spectroscopy 277

Figure 15.20 Chemical reactions of modified silica gel surfaces. (a) Before TiCl 4
reaction and (b) after TiCl 4
reaction. (Reprinted by permission from Spectroscopy, Vol. 9, No. 8 by J. P. Blitz and S. M. Augustine, © 1994 by
Advanstar Communications.)

Maintenance 10% of purchase price per year
Supplies <$
$=1 to 5K, $$=5 to 15K, $$$= 15 to 50K, $$$$=50 to 100K, $$$$$=>100K.

The major factor affecting the cost of an IR spectrometer is its resolution. Resolution can range
–1 –1 –1
from 16 cm to 0.1 cm . The more expensive ($$$$), higher-resolution (0.1 cm ) instruments are used
to resolve the vibrational bands into their rotational components. These instruments are used in research
laboratories to obtain detailed structural information and physical constants for compounds. The lower-
–1
priced ($$$), medium-resolution (4 to 2 cm ) instruments are adequate for most analyses described
here.

Vendors for Instruments and Accessories

Instruments
Nicolet Instrument Corp.
5225 Verona Rd.
Madison, WI 53711-4495
phone: 800-232-1472, 608-276-6100
fax: 608-273-5046
email: nicinfo@nicolet.com
Internet: http://www.nicolet.com