ISI 08-3e Determination of Fibre in Starch as Fibre Number
ISI 08-3e Determination of Fibre in Starch as Fibre Number 1. Scope The method is applicable to native potato and cassava starch LT 1965 Rev. LT 30. Jan. 2000 2. Principle Starch is hydrolysed and filtered. The discoloration of the filter is visual judged and compared with an internal standard scale. Corns starches do not filter properly. 3. Apparatus 3.1 Analytical balance weighing to the nearest 100 mg. 3.2 Boiling water bath. Shaking bath convenient 3.3 Vacuum filter with an active filter area 20 mm in diameter + high flux paper filter. The diameter of the active filter area is essential. Whatmann No. 1 35 mm diameter Cat. No. 1001 035 4. Reagents 4.1 Hydrochloric acid 0.1 N 4.2 Colour plate Carry out the procedure on starch samples containing x ppm insoluble residues on dry matter with x ranging from 100 to 2000. Mark the filter paper with fibre number = x /500 and keep for reference. The procedure is carried out with increasing quantity of same starch. Above 2.5 g the qua