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GB/T 42307-2023: Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 42307-2023 | English | 274 |
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Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method
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GB/T 42307-2023
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PDF similar to GB/T 42307-2023
Basic data | Standard ID | GB/T 42307-2023 (GB/T42307-2023) | | Description (Translated English) | Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G20 | | Classification of International Standard | 65.080 | | Word Count Estimation | 15,121 | | Date of Issue | 2023-03-17 | | Date of Implementation | 2023-10-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42307-2023: Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method
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ICS65:080
CCSG20
National Standards of People's Republic of China
GB/T 42307-2023/ISO 18643:2016
Fertilizers and soil conditioners Biuret in urea-based fertilizers
Determination of content by high performance liquid chromatography
ofurea-basedfertilizers-HPLCmethod
(ISO 18643:2016, IDT)
Released on 2023-03-17
2023-10-01 implementation
State Administration for Market Regulation
Released 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 for Standardization Documents"
drafting:
This document is equivalent to ISO 18643:2016 "Determination of biuret content in fertilizers and soil conditioners urea-based fertilizers
Phase Chromatography":
A chapter "Terms and Definitions" has been added to this document:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Petroleum and Chemical Industry Federation:
This document is under the jurisdiction of the National Standardization Technical Committee on Fertilizers and Soil Conditioners (SAC/TC105):
This document is drafted by: Shanghai Institute of Chemical Industry Testing Co:, Ltd:, Shanghai Chemical Industry Research Institute Co:, Ltd:, Guizhou Provincial Product Quality Inspection and Testing
Institute, Guangdong Ladome Fertilizer Co:, Ltd:, Ordos Yiding Ecological Agriculture Development Co:, Ltd:, Sichuan Zhongkang Testing Technology Service Co:, Ltd:
company:
The main drafters of this document: Zhang Minghong, Huang Heqing, Yan Kun, Zhou Daying, Wang Xiaochun, Zhang Jing, Li Gewei, Tian Yewei, Zhou Yu:
Fertilizers and soil conditioners Biuret in urea-based fertilizers
Determination of content by high performance liquid chromatography
1 Scope
This document describes a method for the determination of biuret content in liquid and solid urea-based fertilizers by high performance liquid chromatography:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
and testmethods)
Note: GB/T 6682-2008 Analytical Laboratory Water Specifications and Test Methods (ISO 3696:1987, MOD)
3 Terms and Definitions
This document does not have terms and definitions that need to be defined:
4 principles
The content of biuret in fertilizer was extracted with acetonitrile aqueous mobile phase, and biuret was separated from it with amino/aminopropyl column based on reversed-phase liquid chromatography:
The other components were separated and detected with an ultraviolet detector:
5 Reagents or Materials
Caution: According to the chemical safety data sheet, acetonitrile is a flammable and toxic reagent, and related operations should be carried out in a fume hood: this document
Not all potential safety hazards have been pointed out, the operator is responsible for taking necessary safety and health protection measures, and ensuring that the relevant operations comply with relevant regulations:
District laws and regulations:
Only water confirmed as Class III water in ISO 3696 may be used:
5:1 Acetonitrile: chromatographically pure:
5:2 Mobile phase: 150mL of water and 850mL of acetonitrile, filter with a 0:22μm filter membrane before use, and ultrasonically degas for 10min:
NOTE: Another test method using an acetonitrile-free mobile phase and limitations of its application are given in Appendix B:
5:3 Biuret standard solution (0:5mg/mL): Weigh 0:5000g of high-purity biuret, dissolve it in the mobile phase (5:2), and transfer to 1L
In a volumetric flask, dilute to the mark with mobile phase (5:2), and shake well:
The purity of biuret is not less than 97%, and the purity indicated on the reagent label is calculated based on biuret content rather than nitrogen content:
AOAC960:04A(c), ISO 17322 and other standards provide steps for purifying biuret:
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