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SN/T 2297.7-2015: Analysis method for gypsum and gysum products. Part 7: Determination of arsenic and mercury content. Atomic fluorescence spectrum
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 2297.7-2015 | English | 189 |
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Analysis method for gypsum and gysum products. Part 7: Determination of arsenic and mercury content. Atomic fluorescence spectrum
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SN/T 2297.7-2015
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Basic data | Standard ID | SN/T 2297.7-2015 (SN/T2297.7-2015) | | Description (Translated English) | Analysis method for gypsum and gysum products. Part 7: Determination of arsenic and mercury content. Atomic fluorescence spectrum | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | Q62 | | Classification of International Standard | 91.100.10 | | Word Count Estimation | 8,883 | | Date of Issue | 2015-02-09 | | Date of Implementation | 2015-09-01 | | Quoted Standard | GB/T 602; GB/T 2007.1; GB/T 6682 | | Regulation (derived from) | State-Quality-Inspection-Accreditation [2015] 59 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the gypsum and gypsum products, arsenic, mercury content by atomic fluorescence spectrometry (AFS) measurement method. This standard applies to the determination of gypsum and gypsum products arsenic and mercury content. | SN/T 2297.7-2015: Analysis method for gypsum and gysum products. Part 7: Determination of arsenic and mercury content. Atomic fluorescence spectrum
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(Gypsum and gypsum products Analysis - Part 7. arsenic, mercury content of Atomic Fluorescence Spectrometry)
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Gypsum and gypsum products Analysis
Part 7. Determination of arsenic, mercury content
Atomic Fluorescence Spectrometry
Part 7. Determinationofarsenicandmercurycontent-
Issued on. 2015-02-09
2015-09-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
SN/T 2297 "gypsum and gypsum products analysis" is divided into eight sections.
--- Part 1. Determination of strontium content;
--- Part 2. Determination of organic matter;
--- Part 3. Determination of sulfide content;
--- Part 4. Determination of volatile sulfur compounds;
--- Part 5. Determination of sulfur content by gas chromatography - mass spectrometry;
--- Part 6. Determination of elemental sulfur;
--- Part 7. arsenic, mercury content by atomic fluorescence spectrometry;
--- Part 8. Water-soluble fluoride, chloride content by ion chromatography.
This section SN/T 2297 Part 7.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section proposed and managed by the National Certification and Accreditation Administration Committee.
This section was drafted by. People's Republic of China Exit Inspection and Quarantine, Guangdong, Shandong, People's Republic of China Entry-Exit Inspection and
Quarantine Bureau.
The main drafters of this section. Zhao Quan, Li Han, Zhao, Bo Ping, Xiaoda Hui, Lee Jun, ZHOU Ming-hui, former Shaw.
Gypsum and gypsum products Analysis
Part 7. Determination of arsenic, mercury content
Atomic Fluorescence Spectrometry
1 Scope
This section SN/T 2297 provisions of the gypsum and gypsum products, arsenic, mercury content by atomic fluorescence spectrometry (AFS) measurement method.
This section applies to the determination of gypsum and gypsum products, arsenic, mercury content.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any modifications thereto) are applicable to this document.
Preparation of standard solution of GB/T 602 Determination of impurities in chemical reagents
GB/T 2007.1 bulk minerals sampling and sample preparation General manual sampling methods
Laboratory use specifications and test methods GB/T 6682 Analysis
3 Method summary
After sample digestion with thiourea - ascorbic acid will be converted to pentavalent arsenic trivalent arsenic, at a certain acidity, test solution and potassium borohydride by hydrogenation
Was produced hydride generator, with the carrier gas into the quartz tube atomizer, measured at arsenic (193.7nm), mercury (253.7nm) characteristic fluorescence wavelength
Its fluorescence, the fluorescence intensity of the measured fluorescence intensity of test solution and standard solution phase comparison, the content of the test solution of arsenic and mercury.
4 Reagents and materials
In addition to the provisions use the gifted class pure reagents, test water should be consistent with a water GB/T 6682 regulations.
4.1 nitric acid (ρ = 1.42g/mL).
4.2 hydrochloric acid (ρ = 1.19g/mL).
4.3 Hydrogen peroxide (ρ = 1.44g/mL).
4.4 mercury standard solution (1000μg/mL). according to GB/T 602 formulated or direct purchase of certified reference materials.
4.5 arsenic standard solution (100μg/mL). according to GB/T 602 formulated or direct purchase of certified reference materials.
4.6 hydrochloric acid solution (119).
4.7 thiourea (5%) and ascorbic acid (5%) mixed solution. Weigh 5.0g thiourea and 5.0g of ascorbic acid, dissolved in an appropriate amount of water, set the volume to
100mL. Now with the current.
4.8 Potassium hydroxide (5g/L). Weigh 5.0 potassium hydroxide dissolved in an appropriate amount of water and dilute to 1000mL.
4.9 solution of potassium borohydride (10g/L). Weigh 10g potassium borohydride, dissolved in sodium hydroxide solution (4.8) and dilute to 1000mL. Present
Service is used.
4.10 arsenic and mercury standard solution. draw the right amount of mercury standard solution (4.4) and arsenic standard solution (4.5), respectively, with hydrochloric acid solution (4.6) dilute
Diluted to 1μg/mL (arsenic) and 0.1μg/mL (Hg), and then were to learn of the arsenic, mercury standard solution 0mL, 0.2mL, 0.4mL, 0.8mL,
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