Preservation with benzoic acid and sorbic acid

LC5.4.1.2
Preservation with benzoic acid and sorbic acid
Preservation with benzoic acid and sorbic acid

Description

Next to the preservative ascorbic acid, benzoic acid and sorbic acid are also counted as preservatives. In this experiment, the students will identify the preservative effect of these two substances and work out the chemical background of their antimicrobial effect.

Components of equipment sets

1 30945  4 
Universal pencil LD
3 6659541  8 
Rubber bulb LD
3 6659531  4 
Dropping pipette 150 mm x 7 mm Ø LD
1 6045682  4 
Powder spatula, steel, 185 mm LD
1 667057  4 
Test tube rack metal, 20 mm Ø LD
2 6640421  4 
Test tube Fiolax 16 mm x 160 mm LD
2 664183  4 
Petri dish, 100 x 20 mm, glass LD
2 667253  4 
Rubber stopper solid, 14...18 mm Ø LD
1 610010  8 
Laboratory safety goggles LD
1 6708300  4 
Benzoic acid, 50 g LD
GHS07 Warning H302 H319
1 6749100  4 
Sorbic acid, 25 g LD
GHS07 Warning H315 H319 H335
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