Agricultural Product Standards Act, 1990 (Act No. 119 of 1990)Regulations2026 RegulationsRegulations relating to the Grading, Packing and Marking of Canola intended for Sale in the Republic of South Africa: Effective 19 December 2026Part IV : Inspection Methods15. Determination of percentage foreign matter |
The percentage foreign matter in a consignment of canola shall be determined as follows:
| (a) | Obtain a working sample of at least 500g from a representative sample of the consignment. |
| (b) | Place the sample on the round-hole sieve that fits on top of the slotted sieve and sieve the sample by moving the sieve 10 strokes back and forth, alternately away from and back towards the handler of the sieve. With each stroke, move the sieve which rests on a table or other smooth surface, 250mm to 460mm away from and back toward the handler. The prescribed 10 strokes must be completed within 10 to 15 seconds. |
| (c) | Weigh the material remaining on the round-hole sieve and express it as a percentage. |
| (d) | inspect the sample under the round-hole sieve for any sand, weed seeds, or any other material other than whole and broken canola seeds/hulls. If any of the above items are observed in the sample under the round-hole sieve, the slotted sieve is used for further grading as described in (e) otherwise, proceed directly to point (g). |
| (e) | if sand, weed seeds, or any other material besides whole and broken canola seeds/hulls are found in the sample under the round-hole sieve, the remaining portion of the sample is sieved using the slotted sieve by moving the sieve 40 stokes back and forth, alternatively away from and back toward the handler of the sieve. With each stroke, move the sieve, which rests on a table or other smooth surface, 250mm to 460mm away from and back toward the handler. The prescribed 40 strokes must be completed within 40 to 50 seconds. |
| (f) | Determine the mass of all the material that passes through the slotted sieve and express the mass as a percentage of the working sample. |
| (g) | The total foreign material is calculated by adding the percentages determined in (c) and (f). |