Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
Development of Karl Fischer Reagents
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Examples <strong>of</strong> substances that can be measured directly:<br />
Chapter II: Applications - 1<br />
Methyl chloride, vinyl chloride, methylene chloride, methylene iodide,<br />
chlor<strong>of</strong>orm, carbon tetrachloride, iod<strong>of</strong>orm, ethyl iodide, ethylene bromide,<br />
ethylidene bromide, 6-chloropropylene, 1,4-dichloro-2-butene,<br />
bromobenzene, iodobenzene,chloronaphthalene, bromonaphthalene<br />
[Examples <strong>of</strong> Measurement]<br />
(1) Volumetric titration<br />
<strong>Reagents</strong> used: <strong>Karl</strong> <strong>Fischer</strong> Reagent SS-Z (or SS)<br />
General-use Dehydrated Solvent GEX (or MS) 25-50ml<br />
Substance<br />
Chlor<strong>of</strong>orm<br />
Carbon Tetrachloride<br />
1,2-Dichloroethane<br />
1,1,2-Trichloroethane<br />
Chlorobenzene<br />
Dehydrated<br />
solvent<br />
Sample<br />
quantity (g)<br />
(2) Coulometric titration<br />
<strong>Reagents</strong> used: Aquamicron AX (or AS) 100ml<br />
Aquamicron CXU 5ml<br />
Substance<br />
Methylene chloride<br />
Ethylene chloride<br />
Chlor<strong>of</strong>orm<br />
1,1,1-Trichloroethane<br />
1,1,2,2-Tetrachloroethane<br />
Carbon tetrachloride<br />
Chlorobenzene<br />
Methylene bromide<br />
Ethylene bromide<br />
Brom<strong>of</strong>orm<br />
1-Bromotetradecane<br />
1-Bromohexadecane<br />
Tetrabromoethane<br />
Methyl iodide<br />
Ethy iodide<br />
Hexadecyl bromide<br />
General-use<br />
"<br />
"<br />
"<br />
Sample quantity<br />
(g)<br />
3.7445<br />
3.5193<br />
4.1721<br />
3.7146<br />
7.9300<br />
4.4559<br />
3.1038<br />
2.4660<br />
2.2125<br />
2.6518<br />
2.0400<br />
1.0255<br />
2.9079<br />
2.3104<br />
1.9392<br />
1.0067<br />
14.4999<br />
15.7825<br />
6.1605<br />
14.0776<br />
10.9400<br />
Measurement<br />
value (mg)<br />
Measurement value<br />
(µg)<br />
62<br />
244<br />
332<br />
380<br />
3553<br />
101<br />
207<br />
715<br />
202<br />
1747<br />
168<br />
52<br />
478<br />
476<br />
337<br />
50<br />
1.60<br />
0.49<br />
1.48<br />
0.74<br />
0.71<br />
Moisture<br />
content (ppm)<br />
110<br />
31<br />
240<br />
53<br />
65<br />
Moisture content<br />
(ppm)<br />
17<br />
70<br />
80<br />
102<br />
430<br />
22<br />
67<br />
290<br />
91<br />
659<br />
75<br />
51<br />
164<br />
206<br />
174<br />
50<br />
75
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