KOMEX uses the East African Grading Standards for Grains. The standards specify the requirements, sampling, and testing methods for Grains traded on KOMEX.
4 Grading Standards for Green Grams:
The specific requirements for the dry whole grains of the green gram of the cultivar Vigna radiata, intended for human consumption, are:
| Characteristics |
Maximum limits | Method of test | |||
| Grade 1 | Grade 2 | Grade 3 | |||
| Moisture, % max m/m | 12.0 | 12.0 | 12.0 | ISO 24557 | |
| Size grading | 98 % | 98 % | n/a | ||
| Purity, % min m/m | 99.0 | 99.0 | 99.0 | ||
| Defective, % max m/m | 2.0 | 4.0 | 6.0 | ||
| Immature grain % max m/m | 2.0% | 3.0 | 4.0 | ||
| Contrasting classes | 0.5% | 1.0 | 2.0 | ISO 605 | |
| Classes that blend max % m/m | 5.0 | 10.0 | 15.0 | ||
| Germination Excluding hard seeds |
90 % | n/a | n/a | ||
| Sprout test | Suitable | n/a | n/a | ||
| Foreign material % max m/m | Organic | 0.65 | 0.65 | 0.65 | |
| inorganic | 0.25 | 0.25 | 0.25 | ||
| Filth | 0.1 | 0.1 | 0.1 | ||
| Other edible grains %max m/m Any edible grains (including oilseeds) other than green grams |
0.1 | 0.5 | 3.0 | ||
| Inset /pest damaged % max m/m Grains per cent by count clean-cut weevil bored |
1 | 2 | 3 | ||
| Total Aflatoxin (AFB1+AFB2+AFG1 +AFG2)), ppb | 10 | ISO 16050 | |||
| Aflatoxin B1 only, ppb | 5 | ||||
| Fumonisin ppm | 2 | ||||
Note:
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- Sampling shall be done in accordance with the EAS 79/ISO 13690.
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Click on the link to download a comprehensive copy of The East African Grading Standards for Green Grams