Development of Karl Fischer Reagents
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Development of Karl Fischer Reagents

Development of Karl Fischer Reagents

Development of Karl Fischer Reagents

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Substance<br />

Dehydrated<br />

solvents<br />

Sample Quantity<br />

(g)<br />

Chapter III: Applications - 2<br />

Measurement Value<br />

(mg)<br />

Moisture Content<br />

(%)<br />

Aminophylline General-use 0.2115 8.90 4.21<br />

Digitalis " 0.3502 5.46 1.56<br />

Antibiotics " 0.1245 8.35 6.71<br />

Gibberellin methyl ester " 0.2005 3.31 1.65<br />

Berberine chloride " 0.0433 4.23 9.55<br />

Glutathione " 0.2713 11.51 4.24<br />

Aspirin aluminum " 0.1638 2.33 1.42<br />

Carbetapeten citrate " 0.3053 0.13 0.043<br />

Chlorobutanol " 0.0896 4.35 4.85<br />

Patenol " 0.1243 0.13 0.10<br />

Erythromycin lactobionate " 0.0431 1.43 10.3<br />

Rutin " 0.1202 11.36 9.45<br />

Libotite Sugar-type 0.1337 31.18 23.3<br />

Hemin " 0.1838 1.47 0.800<br />

Phosphomycin Ca " 0.1533 14.65 9.49<br />

Pantechinan " 0.1375 28.30 20.6<br />

Sodium aspartate Sugar-type (40 � C) 0.0543 5.77 10.6<br />

Throat drops " (40� C) 0.2970 10.79 3.63<br />

(2) Moisture vaporization - Volumetric titration<br />

<strong>Reagents</strong> used: <strong>Karl</strong> <strong>Fischer</strong> Reagent SS-Z (or SS)<br />

Dehydrated Solvent GEX (or MS) + PG (3:1) 50-100ml<br />

Substance<br />

Phosphomycin Ca<br />

Potassium xanthogenate<br />

Heating Temperature<br />

( � C)<br />

250<br />

150<br />

Sample Quantity<br />

(g)<br />

0.1142<br />

0.5009<br />

(3) Coulometric titration<br />

<strong>Reagents</strong> used: Aquamicron AX (or AS) 100ml<br />

Aquamicron CXU 5ml<br />

Substance<br />

Albumin<br />

Polypeptide<br />

Aminophylline<br />

Sample Quantity<br />

(g)<br />

0.2236<br />

0.0037<br />

0.0427<br />

Measurement Value<br />

(µg)<br />

0693<br />

0316<br />

1795<br />

Measurement Value<br />

(mg)<br />

10.58<br />

02.42<br />

Moisture Content<br />

(%)<br />

0.310<br />

8.540<br />

4.200<br />

Moisture Content<br />

(%)<br />

9.260<br />

0.483<br />

183

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