Search result: GB/T 23950-2024 (GB/T 23950-2009 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23950-2024 | English | 239 |
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General methods for the determination of heavy metals in inorganic chemical products
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GB/T 23950-2024
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| GB/T 23950-2009 | English | 189 |
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Inorganic chemicals for industrial use -- General method for determination of heavy metals
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GB/T 23950-2009
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| Standard ID | GB/T 23950-2024 (GB/T23950-2024) | | Description (Translated English) | General methods for the determination of heavy metals in inorganic chemical products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G10 | | Classification of International Standard | 71.060.01 | | Word Count Estimation | 12,186 | | Date of Issue | 2024-07-24 | | Date of Implementation | 2025-02-01 | | Older Standard (superseded by this standard) | GB/T 23950-2009 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 23950-2024
General methods for the determination of heavy metals in inorganic chemical products
General method for determination of heavy metals in inorganic chemical products
General methods for the determination of heavy metals in
inorganic chemical products
ICS 71.060.01
CCS G10
National Standard of the People's Republic of China
Replace GB/T 23950-2009
Released on 2024-07-24
2025-02-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Preface
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 23950-2009 "General method for determination of heavy metals in inorganic chemical products". Compared with GB/T 23950-2009,
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.2009 edition); a)
Added "Sample Processing" (see Chapter 5); b)
Added "Inductively coupled plasma optical emission spectrometry" (see 6.2). c)
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 on Chemical Standardization (SAC/TC 63).
This document was drafted by. Zhejiang Dayang Biotechnology Group Co., Ltd., GEM Co., Ltd., Zhejiang Huayou Cobalt Co., Ltd.
Co., Ltd., Hubei Xingfa Chemical Group Co., Ltd., Ningxia Ruitai Technology Co., Ltd., Liaoning Xinmei Chemical Research Institute Co., Ltd.
Co., Ltd., Henan Xinlianxin Fertilizer Testing Co., Ltd., Jiyuan Lutai Nanomaterials Co., Ltd., Longbai Group Co., Ltd., Hubei Yihua
Phosphorus Chemical Industry Co., Ltd., Qinghai Salt Lake Research Institute of the Chinese Academy of Sciences, Srir Environmental Technology Co., Ltd., State Investment Xinjiang Lop Nur Potash Co., Ltd.
Limited Liability Company, Shandong Xinhua Silica Gel Co., Ltd., Qinghai Chuangxin Electronic Materials Co., Ltd., Jiangxi Nuclear Industry Xingzhong New Materials Co., Ltd.,
Wudi Xinyue Chemical Group Co., Ltd. and CNOOC Tianjin Chemical Research and Design Institute Co., Ltd.
The main drafters of this document are. Xia Jing, Wei Qiong, Lei Yangui, Liu Li, Fan Changchun, Zhang Jiajun, Zhu Zhili, Qi Lei, Sun Liang, Leng Hui,
Ma Xiuzhen, Liang Jinhua, Li Shoujiang, Qiu Xingdong, Zhang Peng, Zhu Wenchao, Zhang Xiangyang, Gong Chuangzhou, Wang Guoping, Xu Kaihua, Qian Zhengyang,
Wang Hua, Wang Lianzhi, Lou Xiaojie, Li Dongxing, Hu Xiaming, Zhang Kun, Zhang Yuansong, An Xiaoying, Ding Ling, and Zhang Kai.
This document was first published in.2009 and this is the first revision.
General method for determination of heavy metals in inorganic chemical products
Warning - Some of the reagents used in this document are hazardous and must be handled with caution. Personnel using this document should have formal laboratory experience.
This document does not address all possible safety issues. It is the user's responsibility to take appropriate safety and health precautions.
And ensure that the conditions stipulated by relevant national laws and regulations are met.
1 Scope
This document gives the general provisions and sample preparation methods for the general method for the determination of heavy metals in inorganic chemical products.
Method for determination of heavy metal content in foods.
This document is applicable to the determination of heavy metal content in inorganic chemical products.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies.
in this document.
GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories
GB/T 30902-2014 Determination of impurity elements in inorganic chemical products - Inductively coupled plasma optical emission spectrometry (ICP﹘OES)
HG/T 3696.2 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products Part 2.Standard solutions for impurities
Preparation of liquid
HG/T 3696.3 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products Part 3.Preparations and products
Preparation
3 Terms and definitions
There are no terms or definitions that require definition in this document.
4 General Provisions
The reagents and water used in this document, unless otherwise specified, refer to analytically pure reagents and those specified in GB/T 6682-2008.
The impurity standard solutions, preparations and products used in the test, unless otherwise specified, shall be in accordance with HG/T 3696.2 and
Prepared in accordance with the provisions of HG/T 3696.3.
5.Sample processing
Treat according to the method specified in 7.3 of GB/T 30902-2014.
......
GB/T 23950-2009
Inorganic chemicals for industrial use. General method for determination of heavy metals
ICS 71.060.01
G10
National Standards of People's Republic of China
Inorganic chemical products for heavy metals
General method for determination
Posted 2009-06-02
2010-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee chemical inorganic chemicals Club (SAC/TC63/SC1) centralized.
Drafting of this standard. Hubei Xingfa Chemicals Group Co., Ltd., CNOOC Tianjin Chemical Research & Design Institute, Fluoride Chemicals
Co., Ltd., Qingdao Ocean Chemical Co., Ltd.
The main drafters of this standard. Bow Chong Zhou, Wan Kim Joo, Wang Jianping, Liu Chunlei.
This standard is the first release.
Inorganic chemical products for heavy metals
General method for determination
1 Scope
This standard specifies the determination of heavy metals in the inorganic chemicals common method --- visual colorimetry safety tips, general provisions, the original method
Li, reagents, instruments, analysis step.
This standard applies to inorganic chemical products, heavy metals (Pb) limit determination. Detection range. 0.2μg/mL ~
2μg/mL.
2 Normative reference standard
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD)
Preparation of HG/T 3696.2 inorganic chemical products, chemical analysis of impurity standard solution
Preparations of HG/T 3696.3 inorganic chemical products, chemical analysis
3 Safety Tips
Reagents used in this test method are toxic or corrosive, be careful when operating! If necessary, the need to feed in the hood
Row. As splashed on the skin should immediately wash with water, severe cases should be treated immediately.
4 General Provisions
This standard reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 specified three
Grade water.
Impurity standard solution, preparations and products needed to test, in the absence of other requirements specified according to HG/T 3696.2, HG/T 3696.3
Provisions prepared.
5 principle of the method
Inorganic chemical products, heavy metal ions and negative ions in the divalent sulfur weakly acidic medium (pH = 3 ~ 4) to generate colored sulfide precipitation.
Low content of heavy metal elements to form a stable suspension of tan, heavy metals can be used for visual colorimetric method.
6 Reagents
Hydrochloric acid solution was 6.1. 1 + 1.
6.2 ammonia solution. 1 + 14.
6.3 acetate buffer solution (pH≈3.5).
Weigh 25.0g of ammonium acetate, adding 25mL water, dissolved, 45mL hydrochloric acid solution (1 + 1), with dilute hydrochloric acid or dilute ammonia water to adjust pH
To 3.5, dilute with water to 100mL.
6.4 saturated solution of hydrogen sulfide (extemporaneous preparation).
6.5 sodium sulfide solution.
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