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NY/T 525-2021 English PDFUS$369.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. NY/T 525-2021: (organic fertilizer) Status: Valid
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NY 525-2012: Organic fertilizer---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.Organic fertilizer People's Republic of China agricultural industry standards Replacing NY 525-2002 organic fertilizer Posted2011-09-01 2011-12-01 implementation People's Republic of China Ministry of Agriculture released ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. 4.2, 4.3 and 4.4 in Chapter 4 of this standard, Chapter 6, 7.1 and 7.2 in Chapter 7 are mandatory and the rest are recommended terms. This standard is NY 525-2002 "organic fertilizer" amendment. This standard replaces NY 525-2002 "organic fertilizer", compared with NY 525-2002 main changes. - Amended total As, Hg, Pb, Cd, total chromium; - Revision of mass fraction of organic matter, mass fraction of total nutrients (potassium phosphorus oxalate), moisture (fresh sample) Mass fraction, pH (pH); - Escherichia coli index revised as fecal coliform number of indicators; - Modify the method for determination of organic matter content by adding a correction factor of 1.5. This standard by the People's Republic of China Ministry of Agriculture Planting Management Division and centralized. This standard was drafted. National Agricultural Technology Extension Service Center, Nanjing Agricultural University, Soil and Fertilizer Station in Anhui Province, Jilin Province soil Soil fertilizer terminal. Cui Yong, Yang Fan, Li Rong, Shen Rong, Chu Jingdong, Li Xuan, Huang Lan, Sun Zhao, Dong Yan, paragraph IAC. This standard superseded standard previous versions released as follows. - NY 525-2002. organic fertilizer1 ScopeThis document specifies the technical requirements for organic fertilizers, test methods, inspection rules, labeling, packaging, transportation and storage. This document applies to livestock and poultry, animal and plant residues and animal and plant products as raw materials processed as raw materials, and fermented Cooked organic fertilizer made. This document does not apply to organic manure produced by green manure, peasant and other farmers.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 601 chemical reagent titration analysis (capacity analysis) prepared with standard solution GB/T 6679 General rules for sampling solid chemical products GB/T 6682 analytical laboratory water specifications and test methods GB/T 8170 rounded repair rules and limit values of the representation and judgment GB/T 8576 compound fertilizer free water content determination Vacuum oven method GB 18382 fertilizer labeling content and requirements GB 18877 organic - inorganic compound fertilizer GB/T 19524.1 Determination of fecal coliform bacteria in fertilizers GB/T 19524.2 Determination of Ascaris egg death rate in fertilizers HG/T 2843 chemical analysis of fertilizer products commonly used standard titration solution, standard solution, reagent solution and indicator solution NY 884 bio-organic fertilizer "Product Quality Arbitration Inspection and Product Quality Supervision and Management Measures" State Bureau of Quality and Technical Supervision Order No. 4 of.19993 Terms and definitionsThe following terms and definitions apply to this document. Mainly from plants and (or) animals, after fermentation of carbonated organic materials maturity, its function is to improve soil fertility ,, provide Nutrition, improve crop quality. 3.2 Fresh Sample Fresh Sample Site collection of organic fertilizer samples.4 requirements4.1 Appearance Color is brown or beige, granular or powder, uniform, no foul, no mechanical impurities. 4.2 Organic fertilizer technical indicators should meet the requirements of Table 1. Table 1 Project Indicators Organic matter mass fraction (on a dry basis), (%) ≥45 The total nutrient (phosphorus pentoxide Phosphorus oxide) mass fraction (on a dry basis), (%) ≥ 5.0 Water (fresh) mass fraction, (%) ≤ 30 PH, (pH) 5.5-8.5 4.3 The limit indicator of heavy metals in organic fertilizers should meet the requirements in Table 2. Table 2 is in milligrams per kilogram Project limited indicators Total arsenic (As) (dry basis) ≤15 Total mercury (Hg) (on a dry basis) ≤2 Total lead (Pb) (on a dry basis) ≤50 Total cadmium (dry basis) ≤ 3 Total chromium (on a dry basis) ≤150 4.4 Roundworm egg mortality and fecal colony number of indicators should be consistent with the requirements of NY 884.5 test methodsThe water used in this document should be in accordance with the provisions of three water GB/T 6682. Reagents listed, except as indicated, refer to analytical reagents. Test The required standard solution in the test, prepared according to HG/T 2843 regulations. 5.1 appearance Visual, nasal olfactory determination. 5.2 Determination of organic matter content (potassium dichromate capacity method) 5.2.1 method principle With a quantitative potassium dichromate - sulfuric acid solution, the heating conditions, the organic fertilizer organic carbon oxidation, the excess potassium dichromate with Ferrous sulfate standard solution titration, while adding silica as a blank for testing. According to the consumption of oxidants before and after oxidation, there are calculations Machine carbon content, multiplied by a factor of 1.724, for the organic content. 5.2.2 instruments, equipment Laboratory equipment commonly used. 5.2.3 Reagents and preparation 5.2.3.1 Silica. Powdered. 5.2.3.2 Sulfuric acid (ρ 1.84). 5.2.3.3 potassium dichromate (K2Cr2O7) standard solution. C (1/6 K2Cr2O7) = 0.1 mol/L. Weigh after baking at 130 ° C for 3h ~ 4h potassium dichromate (reference reagent) 4.9031g, first dissolved in a small amount of water, and then transferred into 1L volume Volume bottle, diluted with water to the mark, shake spare. 5.2.3.4 potassium dichromate solution. C (1/6 K2Cr2O7) = 0.8 mol/L. Weigh potassium dichromate (analytical grade) 80.0g, first with a small amount of water dissolved, and then transferred into a 1 L volumetric flask, diluted to the mark, shake spare. 5.2.3.5 ferrous sulfate (FeSO4) standard solution. C (FeSO4) = 0.2 mol/L. Weigh (FeSO4 · 7H2O) (analytical grade) 55.6g, dissolved in 900m L water, add sulfuric acid (5.2.3.2) 20m L dissolved, diluted The exact concentration of this solution to 0.1 mol/L potassium dichromate standard solution (5.2.3.3) calibration, Now use the current calibration. C (FeSO4) = 0.2mol/L standard solution calibration. Pipette potassium dichromate standard solution (5.2.3.3) 20.00mL Add 150mL triangle Bottle, add sulfuric acid (5.2.3.2) 3mL ~ 5mL and 2 drops ~ 3 drops of o-morpholine indicator (5.2.3.6), with ferrous sulfate standard solution (5.2.3.5) titration. According to the standard titration of ferrous sulfate titration consumption according to equation (1) calculate the exact concentration of c. Where c1 - potassium dichromate standard solution concentration in units of moles per liter (mol/L); V1 - absorbed potassium dichromate standard solution volume, in milliliters (mL); V2 - titration volume consumed ferrous sulfate standard solution, in milliliters (mL). 5.2.3.6 o-morpholine indicator Weigh 0.695g of ferrous sulfate (analytical grade) and 1.485g of o-phenanthroline (analytical grade) in 100mL of water and shake well for later use. This instruction The agents are easily degenerated and should be kept in airtight brown bottles. 5.2.4 Determination steps Weigh dried sample Φ1mm sieve 0.2g ~ 0.5g (accurate to 0.0001g), placed in 500mL flask, accurately added 0.8 mol/L potassium dichromate solution (5.2.3.4) 50.0 mL, then add 50.0 mL of concentrated sulfuric acid (5.2.3.2), plus a bent neck funnel, Placed in boiling water until the water boiled for 30min. Remove to cool to room temperature, rinse the small funnel, wash solution taken in a triangular flask. Remove Erlenmeyer flask, the reaction was nondestructive into 250 mL volumetric flask, cooled to room temperature, constant volume, draw 50.0 mL solution in 250 mL flask , Add water about 100mL or so, add 2 drops to 3 drops of o-morpholine indicator (5.2.3.6) with 0.2mol/L ferrous sulfate standard solution (5.2.3.5) titration near the end point, the solution from green to dark green, and then drop by adding ferrous sulfate standard until the brick is red only. At the same time 0.2g (accurate to 0.001g) of silica (5.2.3.1) was weighed in place of the sample, following the same analytical procedure using the same test Agent, a blank test. If the amount of standard solution of ferrous sulfate used in titration of the sample is less than 1/3 of the amount of the standard solution of ferrous sulfate used in the blank test, You should reduce the sample size, re-measured. 5.2.5 Analysis of the results of the statement Organic matter content is expressed as the mass fraction of fertilizer, according to equation (2) Calculated. Where. c-- molar concentration of ferrous sulfate standard solution, expressed in moles per liter (mol/L); V0 - blank test, the volume of calibration standard solution consumption, in milliliters (mL); V - The volume of the calibration standard solution, in milliliters (mL) ,rized during the determination of the sample; 0.003 - the molar mass of one-fourth of a carbon atom in grams per mole (g/mol); 1.724 - coefficient of conversion from organic carbon to organic matter; 1.5 - Oxidation correction factor; m - dry-like quality, in grams (g); X0 - dry-like water content; D - po...... |