SWI 132.1.1 Seed Program
Specific Work Instruction
Official Seed Sampling

Appendix VIII: Sample Sizes for Inspector Conducted Purity Analysis for Marketplace Monitoring of Crop Kinds in Grade Tables I-VI and XVIII

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Crop Kinds Purity Examination:
Bulk
Purity Examination:
Bagged
Soybean, corn, peas, beans, and species of other genera with similar seed size1 kg + 4 kg1 kg
Wheat, barley, oats, rye, and species of other genera with similar seed size1 kg + 4 kg1 kg
Lentils, sainfoin500 g + 2 kg500 g
HempN/A600 g
Flax, sorghum, canary grass, sudan grass100 g + 400 g100 g

Instructions:

These instructions are intended for the use of inspectors conducting purity analysis of marketplace samples as outlined in options 2 and 3 of Section 15.5.1.

Purity examination under the column for "bulk" 1 kg + 4 kg indicates that 1 kg should be examined for all impurities and 4 kg should be screened and examined for noxious weed seeds.

If a secondary noxious weed is found, additional quantities should be examined to satisfy the standards in the Seeds Regulations Schedule I, Grade Tables. For example, if one wild oat is found in 1 kg of Canada Foundation No. 2 wheat, an additional 9 kg should be examined to determine whether the seed meets the grade standard for a Canada Foundation No. 2 (1 secondary noxious per 10 kg).

All impurities found in the:

  1. examined purity quantity should be kept in a sealed envelope labelled with, at a minimum, the sampler's inspection sample number, if applicable, the lot number and with an indication that the impurities are from the examined quantity;
  2. screened quantity must be kept in a separate sealed envelope that has been labelled with the sampler's inspection sample number, if applicable, the lot number and with an indication that the impurities are from the screened quantity.

These envelopes must be placed and stored inside the sample bag, unless they are to be forwarded to the CFIA laboratory under Option 2 of Section 15.5.1 which case, attach the envelopes to the SSF (Appendix V).

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