GB/T 8571-2008 English PDFUS$149.00 ยท In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 8571-2008: Preparation of laboratory samples for compound fertilizers Status: Valid GB/T 8571: Historical versions
Basic dataStandard ID: GB/T 8571-2008 (GB/T8571-2008)Description (Translated English): Preparation of laboratory samples for compound fertilizers Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G20 Classification of International Standard: 65.080 Word Count Estimation: 5,517 Date of Issue: 2008-06-17 Date of Implementation: 2008-09-01 Older Standard (superseded by this standard): GB/T 8571-2002 Regulation (derived from): National Standard Approval Announcement 2008 No.10 (Total No.123) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the use shrink points, grinding operations, will get the original granular fertilizer into the sample preparation laboratory sample used for analysis. This standard applies only obtained by a chemical process or by a nitrogen compound fertilizer, fertilizer, potash -based fertilizer made ??by secondary processing of fertilizer. GB/T 8571-2008: Preparation of laboratory samples for compound fertilizers---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Preparation of laboratory samples for compound fertilizers ICS 65.080 G20 National Standards of People's Republic of China Replacing GB/T 8571-2002 Preparation of compound fertilizer laboratory samples Posted 2008-06-17 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard is one of compound fertilizer series of standard test methods, which are listed below national standards. --- GB/T 8571 "compound fertilizer laboratory sample preparation"; --- GB/T 8572 "After distillation of total nitrogen content for compound fertilizers - Titrimetric method"; --- GB/T 8573 "Determination of phosphorus content in compound fertilizer quinoline phosphomolybdate gravimetric method"; --- GB/T 8574 "Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method"; --- GB/T 8576 "free water for compound fertilizers - Determination vacuum oven method"; --- GB/T 8577 "free water for compound fertilizers - Determination Karl Fischer method." This standard replaces GB/T 8571-2002 "compound fertilizer laboratory sample preparation." This standard and GB/T 8571-2002 The main differences are. the standard format has been rewritten. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee under the jurisdiction of fertilizer and soil conditioner and is responsible for interpretation. This standard is drafted by. National Fertilizer Quality Supervision and Inspection Center (Shanghai), Wuxi Pacific Fertilizer Company Limited. The main drafters of this standard. Zhou Yongming, Liu Gang, Liu Zhang Ming, Yuan cloud. This standard was first published in 1988 and 2002, the first revision. Preparation of compound fertilizer laboratory samples1 ScopeThis standard specifies using a condensing points, grinding and other operations, the acquired original granular fertilizer into the sample preparation laboratory samples for analysis using. This standard applies only to chemical or compound fertilizers obtained by the nitrogen, phosphate and potash-based fertilizer made by secondary processing complex Mixed fertilizer. Principle 2 Riffle or by quartering the sample into two equal parts, to the part of the sample and the sample by mixing section to discard the sample down to Requirement, then milled through the sieve to a predetermined, to obtain a uniform, representative for the analysis of laboratory samples (samples known) used.3 Instrument3.1 grid slot riffle. Figure 1, or other riffle have the same effect. 3.2 grinder or mortar; 3.3 test sieve. aperture of 0.5mm, 1.00mm, with chassis and screen lid; 3.4 enamel pan or shovel. its width and grid slots should riffle (3.1) is equal to the width of the hopper.4 sample points reduction4.1 grid and dividing groove riffle The two receivers are placed on both sides of riffle receiving a sample position, the fertilizer sample tile enamel pan (or shovel) inside with both hands Set the tray to add riffle above the hopper, as close as possible to the center and the quadrature position, gently drive the fertilizer added, to form a thin Stream, granular fertilizer can be vertically, all in equal amounts falling grid slot. Attention must continuously added to make fertilizer, otherwise the sample will fall A receiver that can not get the same amount of uniform, representative samples. Discarded and a sample receiver and the other receiver Returns sample riffle shrink points. Repeat this operation until the amount of sample required for analysis (approximately 1000g). To reduce points compared with the original sample Less, you can sample the first two and dividing the resulting samples were again reduced to the amount required. If the amount is greater than the original sample riffle capacity, The sample can be divided into several aliquots, then a copy of the above-described manner and dividing operation, receiver discards a sample, the other Sample was mixed only in the receiver and then shrink points. Reduction of sub-operation should be as fast as possible, in order to avoid sample loss or moisture. Quartering shrink 4.2 points Putty knife or with a shovel manure pile on a clean, dry, smooth surface of a cone-shaped, flattened cone top, at right angles to each other along a second diameter Direction fertilizer sample into four equal parts, remove and discard corner portions, leaving part of the mix. Repeat until the desired amount of sample (About 1000g). 4.1 or 4.3 will shrink 4.2 minutes after mixing the sample into two sealed containers sealed, labeled and marked with the name of the sample, sampling Date, sample name, unit name or number. Bottle for product quality analysis, a bottle save months for future reference purposes.5 sample millThe bottle will be 4.3 times reduction of sub-samples were taken after about 100g, milling or grinding mortar to all through 0.50mm aperture Screen (for wet manure by 1.00mm aperture sieve), mixed, placed in a clean, dry bottle, for composition analysis. Grinding operation to Quickly, in order to avoid loss of water during grinding or moisture, and to prevent overheating of the sample. The remaining laboratory samples for particle size measurement. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8571-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 8571-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 8571-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 8571-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 8571-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8571-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
