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SN/T 2679-2010: Determination of arsenic in wood and wood-based products. Hydride generation-atomic fluorescence spectrometry
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 2679-2010 | English | 239 |
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Determination of arsenic in wood and wood-based products. Hydride generation-atomic fluorescence spectrometry
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SN/T 2679-2010
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Basic data | Standard ID | SN/T 2679-2010 (SN/T2679-2010) | | Description (Translated English) | Determination of arsenic in wood and wood-based products. Hydride generation-atomic fluorescence spectrometry | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | B69 | | Classification of International Standard | 79.010 | | Word Count Estimation | 9,933 | | Date of Issue | 2010-11-01 | | Date of Implementation | 2011-05-01 | | Quoted Standard | GB/T 6682 | | Regulation (derived from) | National Quality Inspection (2010) 582 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the timber and wood products in arsenic hydride generation atomic fluorescence spectrometric method. This standard applies to the timber and wood products Determination of arsenic content. | SN/T 2679-2010: Determination of arsenic in wood and wood-based products. Hydride generation-atomic fluorescence spectrometry
---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 arsenic in wood and wood-based products.Hydride generation-atomic fluorescence spectrometry
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Wood and wood products Determination of arsenic content
Hydride Generation - Atomic Fluorescence Spectrometry
Issued on. 2010-11-01
2011-05-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Fujian Exit Inspection and Quarantine.
The main drafters of this standard. Lu water, Dai Jinlan, Liang Ming, Xu Ming before, Liu Wei, Li Xiaojing, Lin Boling.
Wood and wood products Determination of arsenic content
Hydride Generation - Atomic Fluorescence Spectrometry
1 Scope
This standard specifies the hydride timber and wood products in the arsenic content generation - atomic fluorescence spectrometric method.
This standard applies to wood and wood products Determination of arsenic 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 amendments) applies to this document.
Laboratory use specifications and test methods GB/T 6682 Analysis
3 Method summary
Wood samples were diluted sulfuric acid and hydrogen peroxide mixture treatment, quantitative leaching arsenic compound, the treated solution was filtered, added L- cysteine
The pentavalent arsenic acid pre-reduced to trivalent arsenic in the reaction cell hydride and sodium borohydride, trivalent arsenic arsine generated by argon gas to export it
The atomic fluorescence spectrometer, fluorescence wavelength at 193.7nm, compared with a standard curve for quantitative analysis.
4 Reagents
Unless otherwise stated, only recognized as analytical reagents and in line with two or more water GB/T 6682 regulations.
4.1 sulfuric acid (ρ = 1.84g/mL), pure class distinctions.
4.2 hydrochloric acid (ρ = 1.16g/mL ~ 1.19g/mL), pure class distinctions.
4.3 Hydrogen peroxide (30% aqueous solution).
4.4 sodium hydroxide.
4.5 of sodium borohydride.
4.6 L- cysteine.
4.7 sulfuric acid solution (2.5mol/L). In the case of cooling with stirring and careful addition of water to 1600mL 280mL sulfuric acid (4.1), Cold
It was diluted to 2L.
4.8 3% hydrochloric acid (volume fraction). Pipette 30mL hydrochloric acid (4.2) in 1000mL volumetric flask, water volume.
4.9 10% hydrochloric acid (volume fraction). Pipette 100mL of hydrochloric acid (4.2) in 1000mL volumetric flask, water volume.
4.10 sodium hydroxide solution (5g/L). Weigh 5g of sodium hydroxide (4.4), was dissolved in 1000mL of water, and mix.
4.11 sodium hydroxide solution (10g/L) Weigh 1g of sodium hydroxide (4.4) dissolved in 100mL of water, and mix.
4.12 a solution of sodium borohydride (20g/L). Weigh 10g Sodium borohydride (4.5), was dissolved in 500mL sodium hydroxide solution (4.10) were mixed uniformly,
Now with the current.
4.13 L- cysteine solution (100g/L). Weigh 20gL- cysteine (4.6), dissolved in water, can be added 3mL ~ 5mL hydrochloric acid (4.9)
Or using ultrasound solubilization, diluted with water to 200mL.
4.14 arsenic standard stock solution (100μg/mL). Weigh accurately dried to constant weight in the benchmark arsenic trioxide dryer (As2O3)
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