GB 5491-1985 PDF EnglishUS$205.00 · In stock · Download in 9 seconds
GB 5491-1985: [GB/T 5491-1985] Inspection of grain and oilseeds. Methods for sampling and sample reduction Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
GB 5491-1985: [GB/T 5491-1985] Inspection of grain and oilseeds. Methods for sampling and sample reduction---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB5491-1985 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA UDC (633.1+633.85) 001.4 GB/T 5491-85 Inspection of grain and oilseeds - Methods for sampling and sample reduction Issued on. NOVEMBER 02, 1985 Implemented on. JULY 01, 1986 Issued by. National Bureau of Standards Table of Contents1 Sampling tools... 3 2 Sampling methods... 4 3 Sample reduction methods... 6 Additional information... 7 Inspection of grain and oilseeds - Methods for sampling and sample reduction This Standard applies to the quality inspection of grains and oilseeds.1 Sampling tools1.1 Sampler. also known as grain probe. There are two types. packaging and bulk packaging. 1.1.1 Packaging sampler. three types. 1.1.1 Packaging sampler. three types. 1.1.1.1 Large grain sampler. the overlength is 75cm; the probe length is 55cm; the mouth width is 1.5~1.8cm; the head is pointed or duckbill; the maximum outer diameter is 1.7~2.2cm. 1.1.1.2 Medium and small grain sampler. the overlength is 70cm; the probe length is 45cm; the mouth width is about 1cm; the head is pointed; the maximum outer diameter is about 1.5cm. 1.1.1.3 Powdered grain sampler. the overlength is about 55cm; the probe length is about 35cm; the mouth width is 0.6~0.7cm; the head is pointed; the maximum outer diameter is about 1cm. 1.1.2 Bulk packaging sampler. three types. 1.1.2.1 Thin tube sampler. the overlength is 1m or 2m; with three holes, each hole mouth length is about 15cm; the mouth width is about 1.5cm; the head length is about 7cm; the outer diameter is about 2.2cm. 1.1.2.2 Thick tube sampler. the overlength is 1m or 2m; with three holes, each hole mouth length is about 15cm; the mouth width is about 1.8cm; the head length is about 7cm; the outer diameter is about 2.8cm. 1.1.2.3 Electric suction sampler (inapplicable to impurity inspection). 1.2 Sampling shovel. mainly used for sampling of flowing grain, oilseeds or upside-down sampling. 1.3 Container. The conditions for the sample container are. good sealing performance; clean and insect-free; no leakage and no pollution. The common containers are sample tube, sample bag, sample bottle (ground mouth jar).2 Sampling methods2.1 Number of unit representatives. When sampling, the products of the same type, same batch, same level, same cargo space, same vehicle and ship (cabin) shall be an inspection unit. 2.2 Bulk sampling method 2.2.1 Warehouse sampling. For bulk grain and oilseeds, set points according to the heap shape and area size. Conduct layered sampling according to the height of the grain pile. The steps and methods are as follows. 2.2.1.3 Sampling. According to the areas and points, conduct sampling by layers from up to down. The number of samples at each point is the same. 2.2.1.4 For bulk extra-large grains and oilseeds (such as peanuts, broad beans, sweet potato chips), take the method of picking up piles. Refer to the principle of "point setting according to zone”, at 10~20cm below the grain surface of several points, use the sampling shovel to take out representative samples without selection. 2.3 Packaging sampling method 2.3.1 The number of sampling packages of medium and small grains and oilseeds shall not be less than 5% of the total number of packages. The number of wheat flour sampling packages is not less than 3% of the total number of packages. The package points of sampling shall be evenly distributed. 2.3.2 Sampling packets of extra-large grains and oilseeds (such as peanuts, kernels, sunflower seeds, castor beans, broad beans, sweet potato chips). Not less than 10 packages when it is less than 200 packages. When it is more than 200 packages, for every additional 100 packages, increase 1 package. 2.4 Flowing grain sampling method Sampling of mechanically conveyed grain and oilseeds. According to the quantity of inspected grain and oilseeds and the delivery time, determine the number of samplings and the quantity to be taken each time. Then periodically take samples from the end of the grain flow. 2.5 Sampling method of sporadic receipt and payment of grain and oilseeds Sampling of sporadic receipt and payment (including purchase) of grain and oilseeds. It may refer to the above method, combing with the situation. Conduct sampling flexibly. Make sure that the samples taken are representative.3 Sample reduction methodsSample reduction refers to the process of mixing the original samples thoroughly, and then dividing the average sample or specimen. 3.1 Quarter method Pour the sample on a smooth and flat table or glass plate. Spread the sample into a square with two sample reduction plates. 3.2 Sample reducer The sample reducer is suitable for the sample reduction of medium and small grains and oilseeds. A sample reducer is composed of a funnel, a sample grid and a sample hopper. The sample is divided into two parts by the sample grid. During sample reduction, stabilize the sample reducer. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB 5491-1985 be delivered?Answer: The full copy PDF of English version of GB 5491-1985 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB 5491-1985_English with my colleagues?Answer: Yes. The purchased PDF of GB 5491-1985_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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