Development of Karl Fischer Reagents
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Development of Karl Fischer Reagents

Development of Karl Fischer Reagents

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Chapter II: Applications - 1<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 />

n-Hexane<br />

Benzene<br />

Toluene<br />

Xylene<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 />

n-Pentane<br />

n-Hexane<br />

Isooctane<br />

n-Decane<br />

n-Dodecane<br />

Ligroin<br />

Cyclohexene<br />

1-Hexene<br />

1-Decene<br />

1-Tetradecene<br />

Benzene<br />

Toluene<br />

Xylene<br />

Naphthalene<br />

General-use<br />

"<br />

"<br />

"<br />

Sample quantity<br />

(g)<br />

2.5775<br />

1.8828<br />

3.4600<br />

2.0480<br />

2.1048<br />

2.1315<br />

2.2335<br />

0.7600<br />

0.7475<br />

1.5460<br />

2.5297<br />

2.5151<br />

2.4930<br />

1.7755<br />

6.5870<br />

8.7206<br />

8.5511<br />

4.3511<br />

Measurement<br />

value (mg)<br />

Measurement value<br />

(µg)<br />

48<br />

37<br />

89<br />

54<br />

63<br />

124<br />

69<br />

54<br />

30<br />

21<br />

334<br />

380<br />

174<br />

129<br />

0.25<br />

0.78<br />

0.45<br />

0.72<br />

Moisture<br />

content (ppm)<br />

38<br />

89<br />

53<br />

165<br />

Moisture content<br />

(ppm)<br />

19<br />

20<br />

26<br />

26<br />

30<br />

58<br />

31<br />

71<br />

40<br />

14<br />

132<br />

151<br />

70<br />

73<br />

All liquid samples can be measured continuously up to 20-50ml, using<br />

approximately the same amounts as shown in the table.<br />

Note:<br />

It is convenient to use a syringe-type sampling bottle for<br />

naphthalene. Refer to JIS K2436 for details <strong>of</strong> the test method.<br />

73

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