CHEMICAL FOOD PRESERVATIVES HAVE TO BE USED AT A DOSAGE LEVEL
3.- RECONDITIONING
A NEW ADDITION OF PERSERVATIVES TO STOP MICROBIOLOGICAL DETERIORATION
3.- CHEMICAL
PRESERVATIVES MUST BE STRICTLY LIMITED TO THOSE SUBSTANCES HARMLESS
4, 5, 6.- FACTORS WICH DETERMINE THE ACTION OF CHEMICAL PRESERVATIVES
A) SULPHUR DIOXIDE AND ITS DEREIVATES CAN BE CONSIDERED UNIVERSAL PRESERVATIVES, AND SO AS BENZONIC ACID AN ITS DEREIVATES, WICH HAS A STRONGER REACTION AGAINST YEASTS AND BACTERIA
B) THE INTIAL NUMBER OF MICRO-ORGANISM IN THE TREATED PRODUCT DETERMINES THE EFFICIENCY OF THE PRESERVATIVE
7.- PRODUCT CHEMICAL
INFLUENCE THE PH AND EFFICIENCY OF THE MAJORITY OF CHEMICAL PRESERVATIES AT LOWER PH VALUES
8.- TEMPERATURE
PLAYS A VERY IMPORTANT ROLE FOR THE NATURAL PRESERVATIVE METHOD
9.- TIME
THE TIME NEEDED TO OBTAIN CHEMICAL STERILISATION IS A FEW WEEKS FOR BENZOIC ACID