Page 288 - Analytical method for food addtives

192 Analytical methods for food additives

Reference 2 3 4 5 6

KOH and acidified; fatty acids extracted with hexane. Aqueous polyol solution desalted
Polysorbate 60 extracted with CHCl 3 :ethanol (93+7). Extract saponified with alcohol
polyoxyethylated polyols as insoluble heteropoly acid complex. Precipitate dried to
by mixed-bed ion exchange and barium phosphomolybdate used to precipitate

by analysing known amounts of polysorbate 60 constant weight and polysorbate 60 content calculated using gravimetric factor obtained Extraction of polysorbate 60 from the sample with suitable solvent. Polysorbate polyol moiety recovered, desalted by ion exchange and measured gravimetrically as the barium phosphomol

Principle of method

Summary of methods for polysorbates in foods Matrix Shortening, oils, dressings Foods Processed foods Powdered soup of instant noodles Salad dressing

Table 17.1 (a) Method Gravimetric Gravimetric Colorimetric with confirmation by IR, TLC and GC Colorimetric and TLC Colorimetric and TLC