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GB/T 8574-2010 (GB/T 8574-2024 Newer Version) PDF English


Search result: GB/T 8574-2010 (GB/T 8574-2024 Newer Version)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 8574-2024English199 Add to Cart 3 days Determination of potassium content for compound fertilizers Valid
GB/T 8574-2010English90 Add to Cart 0-9 seconds. Auto-delivery. Determination of potassium content for compound fertilizers -- Potassium tetraphenylborate gravimetric method Valid
GB/T 8574-2002English239 Add to Cart 2 days Determination of potassium content for compound fertilizers potassium tetraphenylborate gravimetric method Obsolete
GB/T 8574-1988English199 Add to Cart 2 days Determination of potassium content for compound fertilizers potassium tetraphenylborate gravimetric method Obsolete
BUY with any currencies (Euro, JPY, GBP, KRW etc.): GB/T 8574-2024     Newer version: GB/T 8574-2024

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GB/T 8574-2010: PDF in English (GBT 8574-2010)

GB/T 8574-2010 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 65.080 G 20 Replacing GB/T 8574-2002 Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method ISSUED ON. SEPTEMBER 26, 2010 IMPLEMENTED ON. MARCH 1, 2011 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Principle ... 5 4 Reagents and materials ... 6 5 Instruments ... 6 6 Preparation of sample solution... 6 7 Analysis steps ... 6 8 Expression of analysis results ... 8 Foreword This Standard is one of the series of standards for compound fertilizer test methods. These series of national standards are listed below. - GB/T 8571-2008 “Preparation of laboratory samples for compound fertilizers”; - GB/T 8572-2010 “Determination of total nitrogen content for compound fertilizers titrimetric method after distillation”; - GB/T 8573-2010 “Determination of available phosphorus content for compound fertilizers”; - GB/T 8574-2010 “Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method”; - GB/T 8576-2010 “Determination of free water for compound fertilizers - Vacuum oven method”; - GB/T 8577-2010 “Determination of free water for compound fertilizers - Karl Fischer method”; - GB/T 24890-2010 “Determination of chloride content for compound fertilizers”; - GB/T 24891-2010 “Determination of particle size for compound fertilizers”. The preparation of sample solution in this Standard references ISO 5317.1983 “Fertilizers - Determination of water-soluble potassium content - Preparation of the test solution”. This Standard replaces GB/T 8574-2002 “Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method”. Main difference between this edition and the previous edition is. the standard format is rewritten. This Standard is proposed by China Petroleum and Chemical Industry Association. This Standard is under the jurisdiction of National Technical Committee on Fertilizers and Soil Conditioners of Standardization Administration of China (SAC/TC 105). Responsible drafting organizations of this Standard. National Center for Quality Supervision and Testing of Fertilizers (Shanghai), Wuxi Pacific Fertilizer Co., Ltd. Main drafters of this Standard. Zhang Minghong, Zhou Yongming, Liu Gang, Liu Yun, Yuan Yun. Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method 1 Scope This Standard specifies the determination of potassium content for compound fertilizers. This Standard applies to the determination of potassium content for compound fertilizers. 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. GB/T 8571 Preparation of laboratory samples for compound fertilizers HG/T 2843 Chemical fertilizer products - Standard volumetric standard reagent and indicator solutions for chemical analysis 3 Principle In weak alkaline solution, sodium tetraphenylborate solution reacts with potassium ions in the sample solution and generates potassium tetraphenylborate precipitates; FILTRATE the precipitates, DRY and WEIGH. If the sample contains cyanamide or organic matters, it may first add bromine water and activated carbon to treat. To prevent cationic interference, an appropriate amount of ethylenediaminetetraacetic acid disodium salt (EDTA) can be added in advance to complex the cation with disodium ethylenediaminetetraacetate. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.