Development of Karl Fischer Reagents

Examples of substances that can be measured directly:
Chapter II: Applications - 1
Phenol, catechol, resorcinol, pyrogallol, guaiacol, picric acid, o-cresol, pcresol,
5-methyl resorcinol, eugenol, p-tert-butyl catechol, �-naphthol, ßnaphthol
[Examples of Measurement]
(1) Volumetric titration
Reagents used: Karl Fischer Reagent SS-Z (or SS)
General-use Dehydrated Solvent GEX (or MS) 25-50ml
Substance
Phenol
m-Cresol
Dehydrated
solvent
Sample
quantity (g)
(2) Coulometric titration
Reagents used: Aquamicron AX (or AS) 100ml
Aquamicron CXU 5ml
Phenol
m-Cresol
o-Cresol
2,6-Xylenol
Substance
General-use
"
Sample quantity
(g)
1.8906
2.0319
0.6042
1.4616
1.9139
2.6048
Measurement
value (mg)
Measurement value
(µg)
1241
242
3048
1737
1.94
1.92
Moisture
content (%)
0.101
0.074
Moisture content
656ppm
119ppm
0.504%
0.119%
81