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Pectin | Procedure | Pectin solution | Pectin hydrolysate |
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2.5 | 15 minutes after addition of KOH | Formation of transparent semi-gel | No formation of transparent semi-gel |
Acidification with dilute HCl | Gelatinous precipitate is formed | Gelatinous precipitate is not formed |
Boil precipitate for 5 minutes at 100°C | Precipitate becomes cloudy | Precipitate does not become cloudy |
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4 | 15 minutes after addition of KOH | Formation of transparent semi-gel | No formation of transparent semi-gel |
Acidification with dilute HCl | Gelatinous precipitate is formed | Gelatinous precipitate not formed |
Boil precipitate for 5 minutes at 100°C | Precipitate becomes cloudy | Precipitate does become cloudy |
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Commercial pectin | 15 minutes after addition of KOH | Formation of transparent semi-gel | No formation of transparent semi-gel |
Acidification with dilute HCl | Gelatinous precipitate is formed | Gelatinous precipitate is not formed |
Boil precipitate for 5 minutes at 100°C | Precipitate becomes cloudy | Precipitate does not become cloudy |
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