SN/T 2004-2007 English PDFSN/T 2004: Historical versions
Basic dataStandard 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 ForewordThis 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 Spectroscopy1 ScopeThis 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 summaryFor 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 reagentsUnless 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 equipment4.1 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 preparation5.1 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. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 2004-2007_English be delivered?Answer: Upon your order, we will start to translate SN/T 2004-2007_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of SN/T 2004-2007_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version SN/T 2004-2007 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
