GB/T 8573-2017_English: PDF (GB/T8573-2017)
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Determination of available phosphorus content for compound fertilizers
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GB/T 8573-2017
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| GB/T 8573-2010 | English | 90 |
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Determination of available phosphorus content for compound fertilizers
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| GB/T 8573-1999 | English | 199 |
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Determination of available phosphorus content for compound fertilizers
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| GB/T 8573-1988 | English | RFQ |
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| 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Count Estimation | 10,175 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-07-01 | | Older Standard (superseded by this standard) | GB/T 8573-2010 | | Drafting Organization | Shenzhen Bata Ecological Engineering Co., Ltd. | | Administrative Organization | National fertilizer and soil conditioner standardization Technical Committee | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | Proposing organization | China Petroleum and Chemical Industry Federation | | Issuing agency(ies) | People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration | | Standard ID | GB/T 8573-2010 (GB/T8573-2010) | | 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Count Estimation | 6,651 | | Date of Issue | 2010-09-26 | | Date of Implementation | 2011-03-01 | | Older Standard (superseded by this standard) | GB/T 8573-1999 | | Quoted Standard | GB/T 8571; HG/T 2843 | | Drafting Organization | National Fertilizer Quality Supervision and Inspection Center (Shanghai) | | Administrative Organization | National Standardization Technical Committee fertilizers and soil conditioners | | Regulation (derived from) | National Standard Approval Announcement 2010 No.6 (Total No.161) | | Proposing organization | China Petroleum and Chemical Industry Association | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the method of extraction and determination of water-soluble phosphorus compound fertilizers and phosphorus content. And provides for the calculation of the percentage of water-soluble phosphorus phosphorus accounted for. This standard applies to phosphorus fertilizer (including mixed fertilizer), does not apply to ammonium, nitrate fertilizer, potassium dihydrogen phosphate chemically synthesized compound fertilizer. | | Standard ID | GB/T 8573-1999 (GB/T8573-1999) | | 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 | 71.040.40; 65.080 | | Word Count Estimation | 4,496 | | Date of Issue | 1999/6/8 | | Date of Implementation | 1999/12/1 | | Older Standard (superseded by this standard) | GB/T 8573-1988 | | Quoted Standard | GB/T 8571-1988; HG/T 2843-1997 | | Regulation (derived from) | Announcement of Newly Approved National Standards 2010 No. (No. 161 overall) 6 | | Proposing organization | Ministry of Chemical Industry of the People Republic of China | | Issuing agency(ies) | State Quality and Technical Supervision |
GB/T 8573-2017
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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GB/T 8573-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.080
G 20
Replacing GB/T 8573-1999
Determination of available phosphorus
content for compound fertilizers
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 ... 4
2 Normative references ... 4
3 Principle ... 4
4 Reagents and materials ... 5
5 Instruments ... 5
6 Analysis steps ... 5
7 Expression of analysis results ... 7
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”.
This Standard replaces GB/T 8573-1999 “Determination of available phosphorus
content for compound fertilizers”.
Main difference between this edition and the previous edition is. the standard format is
rewritten according to the rules of standardization work.
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), Stanley Fertilizer Co., Ltd.
Main drafters of this Standard. Zhang Minghong, Liu Yun, Wu Juan, Gao Jinhua.
This Standard was first issued in 1988 and revised for the first time in 1999.
Determination of available
phosphorus content for compound fertilizers
1 Scope
This Standard specifies the extraction and determination method for water-soluble
phosphorus content and available phosphorus content for compound fertilizers and
specifies the calculation method for the percentage of water-soluble phosphorus in
available phosphorus.
This Standard applies to compound fertilizers containing phosphorus (including mixed
fertilizers), does not apply to compound fertilizers, such as ammonium phosphate,
nitric acid phosphate and potassium dihydrogen phosphate, that are synthesized by
chemical method.
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
USE water and ethylenediamine tetraacetic acid disodium (EDTA) solution to extract
water-soluble phosphorus and available phosphorus from compound fertilizers. In acid
medium, orthophosphate ions in the extract react with quimociac reagent and produce
yellow quinoline phosphomolybdate precipitates. USE quinoline phosphomolybdate
gravimetric method to determine the phosphorus content.
7 Expression of analysis results
7.1 The water-soluble phosphorus content (w1) and available phosphorus content (w2),
expressed as the mass fraction of phosphorus pentoxide (P2O5), are calculated
according to formulas (1) and (2)
where.
m1 - in determination of water-soluble phosphorus, the value of the mass of the
quinoline phosphomolybdate precipitates obtained, in grams (g);
m2 - in determination of water-soluble phosphorus, the value of the mass of the
quinoline phosphomolybdate precipitates obtained in the blank test, in grams (g);
0.03207 - the coefficient for converting the mass of quinoline phosphomolybdate to
the mass of phosphorus pentoxide;
mA - in determination of water-soluble phosphorus, the value of the mass of the
sample, in grams (g);
25 - the value of the volume of the pipetted sample solution, in milliliters (mL);
250 - the value of the total volume of the sample solution, in milliliters (mL);
m3 - in determination of available phosphorus, the value of the mass of the quinoline
phosphomolybdate precipitates obtained, in grams (g);
m4 - in determination of available phosphorus, the value of the mass of the quinoline
phosphomolybdate precipitates obtained in the blank test, in grams (g);
mB - in determination of available phosphorus, the value of the mass of the sample,
in grams (g).
The calculation results are expressed as two digits after the decimal point, and the
arithmetic mean of the parallel determination results is taken as the determination
result.
7.2 Allowable difference
The absolute difference between parallel determination results is not more than 0.20 %;
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