Продукты плодоовощные жидкие. Определение содержания диоксида серы. Практический метод
Название (англ.):
Liquid fruit and vegetable products; Determination of sulphur dioxide content (Routine method)
Описание (англ.):
The determination of free sulphur dioxide consists in direkt iodometric titration of the product at a pH between 0,7 and 1, followed by blank titration of the product, freed from sulphur dioxide by boiling under reflux or by binding its free sulphur dioxide content with an exess of acetaldehyde or propioaldehyde. The bond sulphur dioxide is determined after titration of free compound, rendering ofthe produkt alkaline and titration of the sulphur dioxideliberated by hydrolysis with iodine in an acid medium.
BEVERAGES CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT FRUIT JUICES FRUIT-AND VEGETABLE PRODUCTS FRUITS ROUTINE TESTS SULPHUR DIOXIDE VEGETABLE JUICES VEGETABLES CHEMICAL ANALYSIS AND TESTIN FRUIT-AND VEGETABLE JUICES