GB/T 22427.5-2008Starch - Determination of fineness (English PDF)

2.1

Sieve with screening samples, sieve sieve obtained by dividing the ratio of the total sample of substance and quality.

Principle 3

Sieved with Sieve, sieve-like through the process of obtaining the sample quality.

4.1 Balance

a sense of the amount of 0.1g.

4.2 Sieve

woven wire mesh, selected in accordance with a predetermined aperture product requirements.

4.3 test sieve

woven wire mesh, selected in accordance with a predetermined aperture product requirements. Vibration frequency. 1420 times/min; Amplitude.

2mm ~ 5mm.

4.4 rubber ball

diameter 5mm.

5.1 manual sieving

5.1.1 Sample preparation

Samples should be thoroughly mixed.

5.1.2 said sample

Weigh the sample (5.1.1) 50g, accurate to 0.1g.

5.1.3 Screening

Uniform shaking Sieve (4.2) until the screening no less than so far. Weighing under the screen, to the nearest 0.1g.

5.2 standard test sieve method (Arbitration Act)

5.2.1 Sample preparation

Samples should be thoroughly mixed.

5.2.2 said sample

Weigh the sample (5.2.1) 50g, accurate to 0.1g.

5.2.3 Screening

Evenly pour the sample test sieve (4.3), insert the rubber ball (4.4) 5, fixed sieve, shaking 10min after weighing sieve material,

Accurate to 0.1g.

5.3

Determination of the number of

Parallel experiments should be carried out.