Development of Karl Fischer Reagents

Substance Dehydrated solvents
[Insulating oil]
Sample Quantity
(g)
Chapter III: Applications - 2
Measurement Value
(mg)
Moisture Content
(ppm)
Mineral oil Oil-type 8.8431 0.20 23
Alkylbenzene 2-1 " 8.5784 0.17 20
Alkylbenzene 2-2 " 8.7058 0.55 63
Alkylbenzene 2-3 " 8.3116 0.23 28
Polybutene 3-1 " 8.1933 0.14 17
Polybutene 3-2 " 6.8850 0.19 28
Polybutene 3-3 " 5.9730 0.11 18
Alkyl naphthalene 4-1 " 9.2462 0.15 16
Alkyl naphthalene 4-2 " 9.3594 0.14 15
Alkyl diphenyl ethane " 9.4135 0.38 40
Silicon oil Ketone-type 9.6343 0.37 38
(2) Moisture vaporization - Volumetric titration
Reagents used: Karl Fischer Reagent SS-Z (or SS)
Dehydrated Solvent GEX (or MS) + PG (3:1) 50-100ml
Substance
Gasoline engine oil
Diesel engine oil
Marine engine oil
Marine cylinder oil
Cap grease JIS 1-1
JIS 2-2
Fiber greases JIS 2-3
JIS 2-4
Graphite greases JIS 1-1
JIS 2-1
Heating Temperature
( �C) 150
150
150
150
120
140
140
140
140
120
Sample Quantity
(g)
4.3793
5.5145
5.4998
5.4565
1.0865
1.0776
1.0112
1.0523
1.0519
1.0219
(3) Coulometric titration
Reagents used: Aquamicron AX (or AS) 100ml
Aquamicron CXU 5ml
Measurement Value
(mg)
0.66
0.94
1.04
1.91
2.39
4.20
0.39
0.43
1.89
1.11
Moisture Content
(%)
0.015
0.017
0.019
0.035
0.220
0.390
0.039
0.041
0.180
0.109
145