SN/T 2004: Evolution and historical versions
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| SN/T 2004-2007 | English | RFQ |
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The Japanese pine dry clams quarantine identification method
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SN/T 2004-2007
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| SN/T 2004.1-2005 | English | 239 |
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Determination of mercury in electrical and electronic products - Part 1: atomic fluorescence spectrometry
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SN/T 2004.1-2005
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PDF similar to SN/T 2004-2007
Basic data | Standard ID | SN/T 2004-2007 (SN/T2004-2007) | | Description (Translated English) | The Japanese pine dry clams quarantine identification method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G04;L04 | | Date of Implementation | 7/1/2008 | | Issuing agency(ies) | General Administration of Customs | SN/T 2004.1-2005: Determination of mercury in electrical and electronic products - Part 1: 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 mercury in electrical and electronic products - Part 1. atomic fluorescence spectrometry
Book of the People's Republic of China Entry and Exit Inspection and Quarantine
Determination of mercury in electrical and electronic products
Part 1. Atomic Fluorescence Spectroscopy
Released on July 17,.2005
2006-01-18 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
This part is the first part of SN/T 2004.
Appendix A of this section is an informative annex.
This part is proposed and managed by the National Certification and Accreditation Administration.
This part is drafted by the Shenzhen Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this section. Li Ying, Liu Li, Liu Zhihong, Guo Yan, Wang Hongju, Li Bin, Li Hui, Chen Xuhui.
This section is the first industry standard for entry-exit inspection and quarantine.
Determination of mercury in electrical and electronic products
Part 1. Atomic Fluorescence Spectroscopy
1 Scope
This section specifies the hydride generation atomic fluorescence spectrometry method for mercury in electrical and electronic products.
This section applies to the determination of mercury in electrical and electronic products.
2 Method summary
For metal materials in electrical and electronic products, it is directly treated by conventional acid digestion. For other materials, use closed high temperature pressure
The can-acid digestion process dissolves the mercury in the material into soluble salts in the acid digestion solution. Digestion solution is introduced into the atomic fluorescence spectrometer
Line measurement.
3 reagents
Unless otherwise stated, only reagents identified as analytically pure and above and distilled or deionized water or water of comparable purity were used in the analysis.
3.1 Nitric acid. excellent grade pure.
3.2 Nitric acid solution (5+95).
3.3 30% hydrogen peroxide. analytically pure.
3.4 Hydrochloric acid. excellent grade pure.
3.5 Hydrofluoric acid. analytically pure.
3.6 Sodium hydroxide. analytically pure.
3.7 Sodium hydroxide solution (5g/L). Weigh 5.0g of sodium hydroxide (3.6), dissolve in water, dilute to 1000mL, and mix.
3.8 Sodium borohydride (NaBH4). analytically pure.
3.9 sodium borohydride solution (0.2g/L). weigh 0.1g sodium borohydride (3.8) dissolved in 500mL sodium hydroxide solution (3.7), mix, use
Before the match.
3.10 Mercury standard stock solution. concentration 1mg/mL.
3.11 Mercury standard use solution. concentration 0.5μg/mL, diluted with mercury standard stock solution (3.10), using nitric acid solution (3.2)
Volume.
4 Instruments and equipment
4.1 Atomic Fluorescence Spectrometer. equipped with mercury hollow cathode lamp, the detection limit of mercury for the instrument should reach 2.0 ng/mL.
Record A.
4.2 Oven. (0 ~.200) ° C, temperature control accuracy ± 5 ° C.
4.3 Pressure tank. Teflon liner and stainless steel jacket.
4.4 Electric heating plate.
4.5 Crushing equipment. chainsaws, grinders, metal cutting machines, lathes, etc.
5 sample preparation
5.1 Polymer material
The sample is ground into a powder sample having a particle diameter of not more than 1 mm by a crushing device such as a chainsaw or a grinder.
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