Maize General, Food Specification

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Table 2: Sampling rulesLot or sublotsize (MT)Number of incrementPlace ofsamplingReference≤1003 % of bags and minimum 50 bags (e.g. 60increments for a lot of 100 MT, packed in 50 kg bag)101-200201-300301-4003 % of bags (e.g. 120 increments for a lot of 200 MT,packed in 50 kg bag)3 % of bags (e.g. 180 increments for a lot of 300 MT,packed in 50 kg bag)3 % of bags (e.g. 240 increments for a lot of 400 MT,packed in 50 kg bag)Warehouseor duringproductionGAFTA124-2401-5003 % of bags (e.g. 300 increments for a lot of 500 MT,packed in 50 kg bag)8. ANALYTICAL REQUIREMENTSThe principal tests in table 3 must be performed in order to check if the quality of the <strong>Maize</strong>meets above requirements. Additional analyses shall be defined in case of further qualityassessment.Table 3: List of compulsory tests and reference methodsNo Analyses/testsLimitsReference methods(or equivalent)1 Organoleptic Natural state, smell and color2 Moisture 13.5% max ISO 712-20093 Other colour maize 5.0% max Visual4 Pest damage grains 3.0% max Visual5 Rotten and diseased grains 2.0% max Visual6 Discoloured grains 1.0% max Visual7 Immature/shrivelled grains 2.0% max Visual8 Total defective grains 5.0% max Visual9 Broken grains 4.0% max ISO 5223-199510 Inorganic matter 0.5% max Visual11 Foreign matter 1.0% max Visual12 Filth 0.1% max Visual13 Live insect Nil ISO 6639-1, 2, 3 and 414 Dead insect max 10 dead insects per kg Visual15 Other grains 2.0% max Visual16Aflatoxins total(B1+B2+G1+G2)17 GMO (only if required)20ppb maxNegative (
Annex 1: Method for grading of maize grainThe grading shall be performed as follow:- Draw a sub sample of about 200g by weighing from representative samples collectedfrom the consignment.- Place the sub sample on a 4.5mm round hole sieve and sieve it in such a manner thatall the material on the sieve passes at least 20 times over the entire surface of thesieve.- Remove defective grains and all other substances which would be retained by orpassed through the sieve by hand picking and weighing (table 4). The grading resultsshall be calculated by following the manner presented in table 4.Table 4: Distribution of defective grains, other substances and method for result calculationMass of sub sample (g)= MDistribution of defectivegrains and othersubstances after sieving5 / 5Mass ofcategories(g)**Calculation ofresultOther colour Retained by the sieve a = a × 100/ MPest damage grains Retained by the sieve b = b × 100/ MRotten and diseased grains Retained by the sieve c = c × 100/ MDiscoloured grains Retained by the sieve d = d × 100/ MImmature/shrivelled grains Retained by the sieve e = e × 100/ MOther defective (e.g. Retained by the sievefgerminated, stained…)Total defective grain g = (b+c+d+e+f) ×100/ MBroken grains Passed through the sieve h = h × 100/ MInorganic matterMay be present in materials i = i × 100/ Mretained by and /or passedthrough the sieveOrganic matterMay be present in materials jretained by and /or passedthrough the sieveForeign matterMay be present in materials k = (i+j) × 100/ Mretained by and /or passedthrough the sieveFilthMay be present in materials l = l× 100/ Mretained by and /or passedthrough the sieveLive insectMay be present in materials mretained by and /or passedthrough the sieveDead insectMay be present in materials n = n × 1,000/ Mretained by and /or passedthrough the sieveOther grainsMay be present in materials o = o × 100/ Mretained by and /or passedthrough the sieve** For insect is the number of dead or live insect.
Page 1: Kuala Lumpur, July 27th, 2007 - Axi

Maize General, Food Specification

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