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GB/T 23947.2-2009: Inorganic chemicals for industrial use -- General method for the determination of arsenic content -- Part 2: Gutzeit method
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| GB/T 23947.2-2009 | English | 139 |
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Inorganic chemicals for industrial use -- General method for the determination of arsenic content -- Part 2: Gutzeit method
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GB/T 23947.2-2009
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Basic data | Standard ID | GB/T 23947.2-2009 (GB/T23947.2-2009) | | Description (Translated English) | Inorganic chemicals for industrial use -- General method for the determination of arsenic content -- Part 2: Gutzeit method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G10 | | Classification of International Standard | 71.060.01 | | Word Count Estimation | 6,699 | | Date of Issue | 2009-06-02 | | Date of Implementation | 2010-02-01 | | Quoted Standard | GB/T 6682-2008; HG/T 3696.2; HG/T 3696.3 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.8 (Total No.148) | | 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 | | Summary | This standard provides a common method for the determination of inorganic arsenic chemical products-the principle Gutzeit method, safety tips, general provisions, equipment and analytical procedures, instruments, reagents and materials. This method is applicable to the determination of trace amounts of inorganic arsenic chemical products. The minimum detectable concentration was 0. 25 mg/kg (as As). | GB/T 23947.2-2009: Inorganic chemicals for industrial use -- General method for the determination of arsenic content -- Part 2: Gutzeit method
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Inorganic chemicals for industrial use.General method for the determination of arsenic content.Part 2. Gutzeit method
ICS 71.060.01
G10
National Standards of People's Republic of China
Inorganic chemical products
General Method for Determination of Arsenic
Part 2. Gutzeit method
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
GB/T 23947 "General method for inorganic chemical products Determination of Arsenic" is divided into two parts.
--- Part 1. diethyl dithiocarbamate spectrophotometry silver;
--- Part 2. Gutzeit method.
This section GB/T Part of 223,947.
Appendix A of this section is an informative annex.
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Standardization Technical Committee chemical inorganic chemicals Club (SAC/TC63/SC1) centralized.
This part mainly drafted by. Zhejiang Jiande Tianshi Calcium Carbonate Co., Ltd., CNOOC Tianjin Chemical Research & Design Institute, Tianjin access
Habitat Inspection and Quarantine Bureau.
The main drafters of this section. Zhou Xinmin, Wang Lihong, Lu Siwei, Sun Shujun, Ma.
This section first release.
Inorganic chemical products
General Method for Determination of Arsenic
Part 2. Gutzeit method
1 Scope
This section GB/T 23947 specifies the general method of inorganic chemical products Determination of Arsenic --- principle Gutzeit method, safety tips, a
General provisions, reagents and materials, instruments, equipment and analytical procedures.
This method is applicable to the determination of inorganic arsenic in trace chemical products. The minimum detectable concentration of 0.25mg/kg (As).
2 Normative references
The following documents contain provisions which, through reference GB/T 23947 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
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
Principle 3
In acidic solution, As (Ⅴ) reduced to As (Ⅲ) with potassium iodide and stannous chloride. Plus zinc particles react with acids to produce new eco-hydrogen,
So As (Ⅲ) is further reduced to arsine. When arsine gas and mercury bromide paper effect, resulting in brownish yellow arsenic and mercury compounds, arsenic can be used
Visual colorimetric method.
As3 + + 3Zn + 3H + → AsH3 ↑ + 3Zn2 +
AsH3 + 2HgBr2 → AsH (HgBr) 2 (yellow) + 2HBr
4 Safety Tips
Reagents used in this test method are toxic or corrosive, the operator must be careful! Such as water splashed on the skin should immediately
Flushing, severe cases should be treated immediately.
5 General Provisions
This part of the reagents and water, did not indicate when the other requirements, refer to three analytical reagent and GB/T 6682-2008 specified
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.
6 Reagents and materials
6.1 arsenic-free zinc metal.
6.2 hydrochloric acid.
6.3 KI solution. 150g/L.
6.4 Stannous chloride solution. 400g/L, valid for one month.
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