7.2 Characteristics of Materials
7-3
IRAffinity-1
Only the main characteristics of the materials listed in Table 7.1 are described below.
The Clean-Up lists present only the representative solvents used to wash the material. Even if a solvent is listed
as Clean-Up, confirm that the solvent does not react with the samples.
The Harm solvents can destroy the materials through corrosion or dissolving.
Some solvents not listed as Harm can be harmful to the materials.
Table 7.2 Characteristics of Materials
Material Characteristics Clean-Up Harm
KBr
Potassium bromide
Low cost and wide wavenumber range.
Easy to process with alcohol anhydride.
Most popularly used.
High mechanical strength.
Store under humidity conditions lower than
50%.
chloroform
carbon
tetrachloride
aqueous solution
lower alcohol
NaCl
Sodium chloride
Most inexpensive.
Wide wavenumber range.
Store under humidity conditions lower than
50%.
chloroform
carbon
tetrachloride
aqueous solution
lower alcohol
KCl
Potassium chloride
Similar characteristics as NaCl and KBr.
Not popularly used.
chloroform
carbon
tetrachloride
aqueous solution
lower alcohol
CsI
Cesium iodide
Soft and hence liable to injure.
Applicable to analysis in far-infrared region.
Highly deliquescent.
Store under humidity conditions lower than
40%.
chloroform
carbon
tetrachloride
aqueous solution
lower alcohol
KRS-5 (TlBr+TlI)
Thallium bromide-
iodide
Wide wavenumber range.
High refractive index
Most widely used for ATR prism.
Almost insoluble in water.
Toxic; must be processed at an authorized
manufacturer's site.
chloroform
carbon
tetrachloride
xylene
lower alcohol
acetone
ammonium salt
solution
sulfuric acid
ammonia
EDTA
a solution of a
compound that reacts
with thallium to form
complex
ZnS
Zinc sulfide
Insoluble in water.
Resistant against mechanical and thermal
shocks.
High refractive index.
Effectively used for evaporation depositing.
acetone
alcohol
acidic solution
7.2 Characteristics of Materials
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