GB/T 39229-2020 English PDF

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GB/T 39229-2020: Fertilizers and soil conditioners. Determination of arsenic, cadmium, chromium, lead and mercury contents
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39229-2020	554	Add to Cart	5 days	Fertilizers and soil conditioners. Determination of arsenic, cadmium, chromium, lead and mercury contents	Valid

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Basic data

Standard ID: GB/T 39229-2020 (GB/T39229-2020)
Description (Translated English): Fertilizers and soil conditioners. Determination of arsenic, cadmium, chromium, lead and mercury contents
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G20
Classification of International Standard: 65.080
Word Count Estimation: 29,265
Date of Issue: 2020-11-19
Date of Implementation: 2021-06-01
Quoted Standard: ISO 3696
Adopted Standard: ISO 17318-2015, IDT
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies test methods for the determination of arsenic, cadmium, chromium, lead, and mercury in fertilizers and soil conditioners that are soluble in nitric acid. This standard applies to the determination of arsenic, cadmium, chromium, lead, and mercury in fertilizers and soil conditioners. Special attention should be paid to the applicability of this standard when analyzing certain micronutrient fertilizers.

GB/T 39229-2020: Fertilizers and soil conditioners. Determination of arsenic, cadmium, chromium, lead and mercury contents

---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.
Fertilizers and soil conditioners - Determination of arsenic, cadmium, chromium, lead and mercury contents ICS 65.080 G20 National Standards of People's Republic of China Fertilizer and soil conditioner Determination of arsenic, cadmium, chromium, lead, mercury content 2020-11-19 released 2021-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard adopts the translation method equivalent to the international standard ISO 17318.2015 "Determination of arsenic, cadmium, chromium, lead, and mercury content in fertilizers and soil conditioners". The Chinese documents that have a consistent correspondence with the international documents cited in this standard are as follows. ---GB/T 6682-2008 analytical laboratory water specifications and test methods (ISO 3696.1987, MOD). This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Standardization Technical Committee for Fertilizers and Soil Conditioners (SAC/TC105). Responsible for drafting this standard. Shanghai Research Institute of Chemical Industry Co., Ltd., Hunan Provincial Product Quality Supervision and Inspection Institute, Anhui Provincial Division Special Fertilizer Industry Co., Ltd., Shanghai Chemical Industry Institute Testing Co., Ltd., Tianji Coal Chemical Group Co., Ltd. The main drafters of this standard. Zhang Minghong, Chen Hongjun, Li Xia, Wei Lihua, Wang Wenjie, Jiang Wei, Sun Huaibo, Liu Huiyan, Fu Boyu, Dong Hui. Fertilizer and soil conditioner Determination of arsenic, cadmium, chromium, lead, mercury content

1 Scope

This standard specifies test methods for the determination of arsenic, cadmium, chromium, lead, and mercury in fertilizers and soil conditioners that are soluble in nitric acid. This standard applies to the determination of arsenic, cadmium, chromium, lead, and mercury content in fertilizers and soil conditioners; special attention should be paid to the analysis of certain micronutrient fertilizers. Pay attention to the applicability of this standard.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. ISO 3696 Laboratory analysis water specifications and test methods

3 Principle

The arsenic, cadmium, chromium, lead, and mercury in the sample are extracted by microwave digestion with nitric acid; the digested solution is extracted by inductively coupled plasma emission spectrometry (ICP-OES) for measurement. When determining the content of lead and chromium, indium is used as the internal standard. Note. It is recommended to use internal standards to correct the difference in solution matrix between the standard solution and the fertilizer digestion solution; any other fertilizer samples with the same effect All substances contained can be used as internal standards.

4 reagent

Warning. Nitric acid is corrosive and oxidizing. Related operations should be completed in a fume hood. This standard does not point out all possible security risks. The experimenter is responsible for taking appropriate safety and health protection measures, and to ensure that the relevant operations comply with relevant regional laws and regulations. During the test, all analytically pure chemical reagents and tertiary water meeting the requirements of ISO 3696 were used. 4.1 Nitric acid. d=1.40g/mL, trace element grade nitric acid should be used. 4.2 Nitric acid solution. Add 1 volume of nitric acid to 9 volumes of water. 4.3 Arsenic, cadmium, chromium, lead, mercury element standard stock solution. 1000mg/L, certified standard material. 4.4 Indium standard stock solution. 1000mg/L. Weigh the equivalent of 0.2620g indium nitrate [In(NO3)3] indium nitrate hydrate [In (NO3)3xH2O) Dissolve in a 100mL beaker with nitric acid solution (4.2) and transfer quantitatively to a 100mL volumetric flask, use nitric acid solution (4.2) Dilute to scale and mix well. 4.5 Indium standard solution. 5mg/L. Take 1000mg/L indium standard stock solution and dilute to 5mg/L with nitric acid solution (4.2). 4.6 High purity argon. content ≥99.999%.

5 Apparatus and materials

5.1 Generally laboratory equipment. ......

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