ISO-6757-1984.pdf
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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.MEIK(C1YHAPOJJHAR OPrAHM3ALWlR l-lo CTAHAPTkl3AL b) cl name and address of the manufacturer or packer; batch or code number; d) net country f) mass (or gross 1; request of the importing producing country; any other marking require
2、d by the purchaser. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 22:13:58 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6757-1984 (E) Annex A D
3、etermination of contents of pest-infested and rodent-damaged kernels, spoiled kernels, broken kernels, and extraneous matter content A.1 Spoiled kernels, broken kernels and extraneous matter A.1.1 Procedure Weigh, to the nearest 0,Ol g, a test portion of about 200 g. Examine the test portion visuall
4、y and carefully separate the spoiled kernels, broken kernels and extraneous matter by hand or using tweezers. Weigh each of the categories separately to the nearest 0,Ol g. A.2 Pest-infested and rodent-damaged kernels A.2.1 Procedure Reconstitute the test portion, minus the extraneous matter, taken
5、in A. 1.1 by mixing the spoiled kernels and broken kernels with the apparently sound kernels. Take about 10 % (by mass) of the test portion and count the number of kernels taken. Examine visually for rodent-damaged kernels and remove and count affected kernels (if present). Place the remainder in a
6、conical flask, add water until it completely covers the kernels and boil for 15 min. Cool, remove the skin (integument), ex- amine the kernels visually for pest-infestation and remove and count affected kernels. A.l.2 Expression of results A.2.2 Expression of results The respective content of each c
7、ategory, expressed percentage by mass, is equal to ml - x 100 m0 m0 is the mass, in grams, of the test portion; as a is the mass, in grams, of the category concerned. The content of pest-infested and rodent-damaged expressed as a number percentage, is equal to n1 + “2 x 100 N is the number of rodent
8、-damaged kernels; is the number of pest-infested kernels; kernels, N is the number of kernels taken for the examination. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 22:13:58
9、MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6757-1984 (El Annex B Determination of moisture content B.1 Principle Heating and drying a test portion at 103 + 2 OC. Weighing, and determination of the loss in mass. B.2 Apparatus Usual laboratory equipment, and in parti
10、cular B.2.1 Electrically heated constant-temperature oven, with effective ventilation, capable of being maintained at 103 + 2 OC. B.2.2 Dish, with lid, of corrosion-resistant metal or glass, with an effective surface area of at least 18 cm2 (for example, minimum diameter 50 mm) and of depth 25 to 30
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- ISO 6757 1984
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