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GB/T 40461-2021: Determination of sodium content for fertilizers
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Determination of sodium content for fertilizers
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GB/T 40461-2021
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Basic data | Standard ID | GB/T 40461-2021 (GB/T40461-2021) | | Description (Translated English) | Determination of sodium content for fertilizers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G20 | | Word Count Estimation | 10,144 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40461-2021: Determination of sodium content for 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 sodium content for fertilizers
ICS 65.080
CCSG20
National Standards of People's Republic of China
Determination of sodium content in fertilizer
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Standardization Technical Committee for Fertilizers and Soil Conditioners (SAC/TC105).
Drafting organizations of this document. Linyi Inspection and Testing Center, Shandong Product Quality Inspection Research Institute, Shenzhen Batian Ecological Engineering Co., Ltd.
Co., Ltd., Shanghai Chemical Industry Institute Testing Co., Ltd.
The main drafters of this document. Dou Xingxia, Shang Zhaocong, Zhang Juan, Huang Peizhao, Wang Yan, Tan Zhanao, Xu Nan, Yin Huimin, He Yuan, Tian Yewei.
Determination of sodium content in fertilizer
1 Scope
This document describes the methods for determining sodium content in fertilizers and soil conditioners, including inductively coupled plasma emission spectrometry, flame
Absorption spectroscopy, flame atomic emission spectrometry and flame photometry.
This document applies to the determination of sodium content in fertilizers and soil conditioners.
In this document, the detection limit of inductively coupled plasma emission spectrometry is 2mg/kg, and the limit of quantification is 6mg/kg; flame atomic absorption
The detection limit of spectrometry and flame atomic emission spectrometry is 30mg/kg, and the limit of quantification is 100mg/kg; the detection limit of flame photometry is
60mg/kg, the limit of quantification is.200mg/kg.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 6682 Analytical laboratory water specifications and test methods
NY/T 887 Determination of Density of Liquid Fertilizer
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Preparation of sample solution
4.1 Reagents or materials
4.1.1 Unless otherwise stated, use analytical reagents and water that meets the requirements for secondary water in GB/T 6682.
4.1.2 Citric acid solution. ρ=20mg/mL. Accurately weigh 20.0g of citric acid, dissolve it in water and place it in a 1000mL volumetric flask
Mix well and store in a plastic bottle.
4.2 Equipment
4.2.1 Normal laboratory equipment.
4.2.2 Test sieve. the aperture is 0.50mm and 1.00mm.
4.3 Preparation of samples
Prepare laboratory samples as specified in the corresponding product standards. If it is not specified in the product standard, prepare according to the following method. solid fertilizer passes through
After several times of reduction, take out about 100g, and quickly grind it until all of it passes the 0.50mm test sieve (if the sample is wet, it can pass the 1.00mm test
Sieve), mix well and place in a clean, dry container; after shaking for many times, quickly take out about 100mL of liquid fertilizer and place it in a clean, dry container.
In a dry container.
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