Development of Karl Fischer Reagents

Chapter III: Applications - 2
(2) Moisture vaporization - Volumetric titration
Reagents used: Aquamicron SS-Z (or SS)150ml
Dehydrated Solvent GEX (or MS) + PG (3:1) 50-100ml
Substance
Heating Temperature
( � C)
Sample Quantity
(g)
Measurement Value
(mg)
Moisture Content
(%)
[Flavorings]
Cheese powder 130 0.1915 12.34 6.44
Vanilla powder 130 0.1161 4.70 4.05
Yoghurt powder 130 0.0984 8.47 8.61
Strawberry powder 050 0.3188 4.25 1.33
Orange powder 150 0.2943 6.01 2.04
Palm lemon 180 0.0630 5.68 9.02
[Strengtheners]
Calcium lactate 200 0.0513 14.50 28.3
(3) Coulometric titration
Reagents used: Aquamicron AX (or AS) 100ml
Aquamicron CXU 5ml
Substance
Sodium 5'-inosinate
Sodium citrate
Sorbic acid
Potassium sorbate
Sodium benzoate
Malic acid
Saccharin
Sample Quantity
(g)
0.0524
0.0785
0.9221
1.0728
1.0179
1.0728
0.0921
Measurement Value
(µg)
13467
9649
1048
411
6463
2471
12813
(4) Moisture vaporization - Coulometric titration
Reagents used: Aquamicron AX (or AS) 150ml
Aquamicron CXU 10ml
Moisture Content
(%)
25.7
12.3
0.114
383ppm
0.635
0.230
13.9
169