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GB/T 34766-2017 English PDF

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GB/T 34766-2017: Determination of total humic acid content from mineral source
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Basic data

Standard ID GB/T 34766-2017 (GB/T34766-2017)
Description (Translated English) Determination of total humic acid content from mineral source
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G20
Classification of International Standard 65.080
Word Count Estimation 6,660
Date of Issue 2017-11-01
Date of Implementation 2018-05-01
Regulation (derived from) National Standard Announcement 2017 No. 29
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34766-2017: Determination of total humic acid content from mineral source

---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 total humic acid content from mineral source ICS 65.080 G20 National Standards of People's Republic of China Determination of total humic acid in mineral sources Posted.2017-11-01 2018-05-01 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 proposed by the China Petroleum and Chemical Industry Federation. This standard by the National Fertilizer and Soil Conditioning Standardization Technical Committee (SAC/TC105) centralized. This standard was drafted unit. Shenyang Agricultural University, Shanghai Tianke Chemical Testing Co., Ltd., Liaoning Putian Technology Co., Ltd., Liaoning Province standards Institute of Chemistry The main drafters of this standard. Hu Rui, according to business Cong, Zhao Ying Bo, Tian Hongzhe, Wang, Guo Shu Li, Zhang Zheng, Zhou Chongjun, Tao Xiaodan, Zou Deyi, Zheng Huaqiang. Determination of total humic acid in mineral sources

1 Scope

This standard specifies the total source of humic acid minerals Determination. This standard applies to weathered coal, lignite and peat and other sources of mineral raw materials and humic acid containing humic acid solid fertilizer total humic acid containing The results are based on the carbon 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. HG/T 2843 chemical analysis of fertilizer products commonly used standard titration solution, standard solution, reagent solution and indicator solution

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Humic acid humic acid Humic substances in the larger molecular weight, with aromatic, aliphatic and a variety of functional groups structural features, soluble in dilute alkali solution, insoluble Acid and water, black or brown black amorphous organic weak acid mixture. 3.2 Mineral source humic acid mineralhumicacids Humus acids extracted from weathered coal, lignite, peat and other organic minerals. 3.3 Total humic acid totalhumicacid Humic acid extracted from humic acid raw material or fertilizer with sodium pyrophosphate base solution and acid-precipitated, including free humic acid and Heavy metal ions fixed bound humic acid.

4 test methods

Warning --- reagent potassium dichromate solution with strong oxidizing, sulfuric acid, sulfuric acid solution and sodium hydroxide solution corrosive, related Operation should be carried out in the fume hood and other appropriate safety conditions, test personnel should be properly protected. This standard does not indicate all possible safety Problem, the user is responsible for taking appropriate safety and health measures, and to ensure compliance with the conditions of the relevant state laws and regulations. 4.1 Method summary Adopting sodium pyrophosphate lye to extract the humic acid raw material of mineral source or the humic acid fertilizer containing mineral source to obtain the extract liquid and precipitating under acidic condition, Separated to remove the humic acid and other acidic substances under the acidic conditions, with dilute alkali to dissolve the precipitate, and in the strong acid conditions, with potassium dichromate oxidation extraction Humic acid, excess potassium dichromate with ammonium ferrous sulfate standard solution titration, ammonium ferrous sulfate standard solution consumption calculated, the results with Total humic acid carbon content said.

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