GB/T 34765-2024Fertilizers and soil conditioners—Determination of fulvic acid content and carbon coefficient (English PDF)

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 is required.

This document replaces GB/T 34765-2017 "Determination of fulvic acid content from mineral sources".

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

Changed the scope (see Chapter 1, Chapter 1 of the 2017 edition); - Added the terms and definitions of "mineral source fulvic acid" and "biomass fulvic acid" (see 3.2, 3.3); - Changed the sample preparation (see Chapter 7, 4.4.1 of the 2017 edition); - The determination method of fulvic acid content has been changed (see Chapter 8, Chapter 4 of the 2017 edition); - The determination method of chloride ion content has been changed (see 8.2.3, Appendix A of the 2017 edition); - Changed the calculation basis of the test data from fulvic carbon content to fulvic acid content (see Chapter 9, 2017 Edition) Chapter 5 of);

Changed the precision requirements (see Chapter 10, Chapter 6 of the 2017 edition); - Added "Test Report" (see Chapter 11). - Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the National Technical Committee for Standardization of Fertilizers and Soil Conditioners (SAC/TC 105).

This document was drafted by: Shandong Quanlin Group Co., Ltd., Bengbu Xinghe Straw Biotechnology Co., Ltd., Anhui Salt Fertilizer Technology Co., Ltd., Henan Xinlianxin Fertilizer Testing Co., Ltd., Suzhou Juwei Yuanchuang Biotechnology Co., Ltd., Liaoning Putian Technology Co., Ltd., Shandong Agricultural University Fertilizer Technology Co., Ltd., Shanghai Chemical Industry Research Institute Testing Co., Ltd., Shandong Pinbiao Testing and Certification Co., Ltd., Shandong Innovation Fertilizer Technology Co., Ltd.

Phytic Acid Technology Co., Ltd., Shenyang Agricultural University, Liaocheng University Dongchang College, Wuhan Heyuan Green Biology Co., Ltd., Angel Fermentation Parent Co., Ltd., Yantai Hongyuan Biofertilizer Co., Ltd., and Sichuan Zhongkang Testing Technology Service Co., Ltd.

The main drafters of this document are: Cao Hongyu, Yin Lihua, Ding Fangjun, Zhu Zhili, Zhang Tianyuan, Fu Shifeng, Zhang Hongying, Wei Sujun, Yu Jianmei, Guo Xinsong, Yang Xu, Yan Kun, Li Zhenhua, Wang Jing, Du Maofu, Wang Meng, Liang Siwei, Luo Jiarun, Fan Rong.

The previous versions of this document and the documents it replaces are as follows.

First published in 2017 as GB/T 34765-2017; - This is the first revision. - Fertilizers and soil conditioners Fulvic acid content and Method for determination of carbon coefficient

1 Scope

This document describes the determination method of fulvic acid content and carbon coefficient, including principle, test steps, test data processing, precision and test results. Inspection report.

This document is applicable to the determination of fulvic acid content and carbon coefficient in fertilizers and soil conditioners.

2 Normative references

GB/T 6274

GB/T 6679

GB/T 6680

GB/T 6682

GB/T 38072-2019

NY/T 887

3 Terms and definitions

The terms and definitions defined in GB/T 6274, GB/T 38072-2019 and the following apply to this document.