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GB/T 8573-2017 English PDF

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GB/T 8573-2017: Determination of available phosphorus content for compound fertilizers
Status: Valid

GB/T 8573: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 8573-2017English199 Add to Cart 3 days [Need to translate] Determination of available phosphorus content for compound fertilizers Valid GB/T 8573-2017
GB/T 8573-2010English90 Add to Cart 0--9 seconds. Auto-delivery Determination of available phosphorus content for compound fertilizers Obsolete GB/T 8573-2010
GB/T 8573-1999English199 Add to Cart 2 days [Need to translate] Determination of available phosphorus content for compound fertilizers Obsolete GB/T 8573-1999
GB/T 8573-1988EnglishRFQ ASK 3 days [Need to translate] Determination of available phosphorus content for compound fertilizers Obsolete GB/T 8573-1988

PDF similar to GB/T 8573-2017


Standard similar to GB/T 8573-2017

GB/T 8572   GB/T 8576   GB/T 8574   

Basic data

Standard ID GB/T 8573-2017 (GB/T8573-2017)
Description (Translated English) Determination of available phosphorus content for compound fertilizers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G20
Classification of International Standard 65.080
Word Count Estimation 10,153
Date of Issue 2017-12-29
Date of Implementation 2018-07-01
Older Standard (superseded by this standard) GB/T 8573-2010
Regulation (derived from) National Standards Bulletin 2017 No. 32
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

GB/T 8573-2017: Determination of available phosphorus content 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.
Determination of available phosphorus content for compound fertilizers ICS 65.080 G20 National Standards of People's Republic of China Replacing GB/T 8573-2010 Determination of available phosphorus in compound fertilizers 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 8573-2010 "Determination of available phosphorus content of compound fertilizers," compared with GB/T 8573-2010, the main Technical changes are as follows. --- Increased water-soluble phosphorus extraction method (see 4.1.3.3.2); --- Citrus acid increased by effective phosphorus extraction method (see 4.1.3.4.2); --- Increasing the plasma emission spectrometry determination of water-soluble phosphorus extracted, available phosphorus (see 4.2.2). This standard proposed by the China Petroleum and Chemical Industry Federation. This standard by the National Fertilizer and Soil Conditioning Technical Committee Standardization Technical Committee phosphate compound fertilizer Technical Committee (SAC/TC105/SC3) Focused. This standard is drafted by Shenzhen Bata Ecological Engineering Co., Ltd., Shanghai Chemical Industry Research Institute, Product Quality Supervision, Heilongjiang Province Inspection and Research Institute, Shandong Institute of product quality inspection, product quality supervision and inspection Institute of Hunan Province. The main drafters of this standard. Zhang Minghong, Huang Peizhao, Zhu Chaoxia, Liang Zhenfen, Zhang Juan, Chen Hongjun, Chen Jian, Wang Lu. This standard replaces the standards previously issued as. --- GB/T 8573-1988, GB/T 8573-1999, GB/T 8573-2010. Determination of available phosphorus in compound fertilizers

1 Scope

This standard specifies the method of extraction and determination of available phosphorus content in compound fertilizers. This standard applies to phosphorus-containing compound (combined) fertilizer, mixed fertilizers, organic-inorganic compound fertilizer in the determination of available phosphorus content.

2 Normative references

The 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 6682 analytical laboratory water specifications and test methods GB/T 8571 compound fertilizer laboratory sample preparation Automatic analyzer method for determination of nitrogen, phosphorus and potassium in fertilizers HG/T 2843 chemical analysis of fertilizer products commonly used standard titration solution, standard solution, reagent solution and indicator solution

3 method summary

Using water grinding or ultrasonic extraction of water-soluble phosphorus, disodium ethylenediaminetetraacetate (EDTA) oscillation or citric acid solution ultrasonic extraction of compound fertilizer After the available phosphorus in the material, phosphorus content was determined by quinoline phosphomolybdate gravimetric method or plasma emission spectrometry.

4 test methods

The water used in this standard, in the unspecified specifications, the pH range and conductivity should be consistent with the three water gauge GB/T 6682 Grid; Reagents used in this standard, in the absence of specified other requirements, refer to analytical reagents; standard titration solution used in this standard, standard Quasi-solution, reagent solution and indicator solution, in the absence of the preparation method, according to HG/T 2843 preparation. 4.1 Preparation of sample solution 4.1.1 Reagents and materials 4.1.1.1 nitric acid solution, 1 1. 4.1.1.2 Disodium ethylenediaminetetraacetate (EDTA) solution, 37.5g/L. Weigh 37.5gEDTA in 1000mL beaker, add a small amount Water dissolved, diluted with water to 1000mL, mix well. 4.1.1.3 citric acid solution, 20g/L. Weigh 20.0g citric acid in 1000mL beaker, add a small amount of water dissolved, diluted with water to 1000mL, mix well. 4.1.2 Instruments 4.1.2.1 Usually laboratory equipment. 4.1.2.2 ultrasonic cleaning instrument temperature can be adjusted to 80 ℃, ultrasonic power 300W. 4.1.2.3 Constant Temperature Water Bath Oscillator. Reciprocating or rotary oscillators capable of controlling temperatures of 60 ° C ± 2 ° C.

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