SN/T 3923-2014 English PDFUS$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. SN/T 3923-2014: Determination of cadmium, lead and mercury in wood-based products of import and export. Atomic absorption spectrometry method Status: Valid
Basic dataStandard ID: SN/T 3923-2014 (SN/T3923-2014)Description (Translated English): Determination of cadmium, lead and mercury in wood-based products of import and export. Atomic absorption spectrometry method Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: B69 Classification of International Standard: 79.010 Word Count Estimation: 8,827 Date of Issue: 4/9/2014 Date of Implementation: 11/1/2014 Quoted Standard: GB/T 6682 Regulation (derived from): State inspection certification (2014) 210 Issuing agency(ies): General Administration of Customs Summary: This standard specifies the import and export of wood products of cadmium, lead and mercury content measured by atomic absorption spectrometry. This standard applies to the determination of wood products in cadmium, lead and mercury. SN/T 3923-2014: Determination of cadmium, lead and mercury in wood-based products of import and export. Atomic absorption spectrometry method---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 cadmium, lead and mercury in wood-based products of import and export. Atomic absorption spectrometry method People's Republic of China Entry-Exit Inspection and Quarantine Standards Import and export of wood products Determination of cadmium, lead, mercury Atomic Absorption Spectrometry Determinationofcadmium, leadandmercuryinwood-basedproductsofimport Issued on. 2014-04-09 2014-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released ForewordThis standard was drafted in accordance with GB/T 1.1-2009 given rules. Please note that some content of this document may involve patents, publication of this document Institutions do not assume the responsibility to identify these patents. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Guangdong Inspection and Quarantine Technology Center, People's Republic of China Entry-Exit Inspection and Conghua Quarantine Bureau. The main drafters of this standard. Liuzhuo Qin, Zhang Zhihui, Zhang Rui, Guoren Hong, Zeng Jiaxin. Import and export of wood products Determination of cadmium, lead, mercury Atomic Absorption Spectrometry1 ScopeThis standard specifies the import and export of wood products of cadmium, lead and mercury content measured by atomic absorption spectrometry. This standard applies to the determination of wood products in cadmium, lead and mercury.2 Normative referencesThe 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 Analysis3 Method summaryAfter sample digestion with nitric acid and hydrogen peroxide complete digestion solution Determination of cadmium, lead by flame atomic absorption spectrometry, digestion liquid measuring mercury Given by cold vapor atomic absorption spectrometry.4 ReagentsUnless otherwise indicated, the reagents used were of analytical grade, the water at least up to GB/T 6682 provisions of secondary purity distilled or deionized Sub-water requirements. 4.1 Concentrated nitric acid (ρ = 1.42g/mL). 4.2 Concentrated hydrochloric acid (ρ = 1.19g/mL). 4.3 Hydrogen peroxide (37%). 4.4 with dilute nitric acid (5%). 4.5 potassium dichromate solution. 10g/L. 4.6 Stannous chloride solution.200g/L. Weigh 20.0g stannous chloride, dissolved in 50mL hydrochloric acid (4.2), and transferred to 100mL volumetric flask, Diluted with water to volume, and mix. More than 4.7 mercury absorption solution. [potassium permanganate solution (10g/L) and sulfuric acid solution (1.8mol/L) mixed in equal volumes]. Cadmium 4.8 Standard solution. 1000μg/mL. 4.9 Cadmium standard solution. 10μg/mL. pipette Pipette 1mL cadmium standard solution (4.8) in 100mL volumetric flask, dilute nitric acid (4.4) and dilute to volume, shake. 4.10 Lead standard solution. 1000μg/mL. 4.11 Lead standard solution. 10μg/mL. pipette Pipette 1mL lead standard solution (4.10) in 100mL volumetric flask, dilute nitric Acid (4.4) and dilute to volume, shake. 4.12 Mercury standard solution. Weigh 0.1354g previously dried over phosphorus pentoxide 24h mercury dichloride, dissolved in a little water, and 50mL Nitric acid (4.1), 10mL potassium dichromate solution (4.5), water volume 1000mL, and mix. This solution 1mL containing 100μg mercury (this standard reservoir Preparation was valid for five months). ...... |
