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GB/T 42307-2023 English PDF

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US$274.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42307-2023: Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42307-2023	274	Add to Cart	3 days	Fertilizers and soil conditioners - Determination of biuret content of urea-based fertilizers - HPLC method	Valid

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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

---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.
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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42307-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42307-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42307-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42307-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.