SN/T 4250-2015 English PDFUS$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. SN/T 4250-2015: Determination of sulfer dioxide in bamboo and wood products - Ion chromatography method Status: Valid
Basic dataStandard ID: SN/T 4250-2015 (SN/T4250-2015)Description (Translated English): Determination of sulfer dioxide in bamboo and wood products - Ion chromatography method Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: B69 Word Count Estimation: 7,795 Date of Issue: 2015-05-26 Date of Implementation: 2016-01-01 Quoted Standard: GB/T 6682; SN/T 2918-2011 Regulation (derived from): State Quality-Inspection-accreditation [2015] No.224 Issuing agency(ies): General Administration of Customs Summary: This standard specifies the ion chromatographic method bamboo and wood composite products in sulfur dioxide. This standard applies to the determination of bamboo and wood composite products in sulfur dioxide. SN/T 4250-2015: Determination of sulfer dioxide in bamboo and wood products - Ion chromatography 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. (Wood products of sulfur dioxide by ion chromatography) People's Republic of China Entry-Exit Inspection and Quarantine Standards Determination of sulfur dioxide in wood products Ion Chromatography Issued on. 2015-05-26 2016-01-01 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 of the content of this document may involve patents. Distribution 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. Zhongshan People's Republic of China Exit Inspection and Quarantine. The main drafters of this standard. Fengxue Ya, Li Rong, Liu Gong sources, LI Yun-song, Lee Yang. Determination of sulfur dioxide in wood products Ion Chromatography1 ScopeThis standard specifies the ion chromatographic method bamboo and wood composite products in sulfur dioxide. This standard applies to the determination of bamboo and wood composite products in sulfur dioxide.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 Analysis SN/T 2918-2011 export detection of sulfites in foods3 PRINCIPLE OF THE METHODFormaldehyde solution as the extraction solvent in a sealed vessel ultrasonic extraction of sulfur dioxide in the sample, extract by ion chromatography, Paul Retention time qualitative, external standard.4 Reagents and materialsUnless otherwise specified, the reagents were of analytical grade, test water as a water GB/T 6682 regulations. Anhydrous sodium sulfite 4.1 Standard. Na2SO3 (CAS Number. 7757-83-7). Before use should be based on SN/T 2918-2011 Appendix A feed Line content correction. 4.2 solution of formaldehyde (CH2O). 37%, HPLC grade. 4.3 aqueous formaldehyde solution (0.037%). Pipette formaldehyde solution (4.2) 1.0mL to 1000mL volumetric flask with water to volume. 4.4 sulfur dioxide standard stock solution (1000μg/mL). Weigh accurately 0.1969g anhydrous sodium sulfate standard (4.1), with a small amount of water Dissolution, all transferred to 100mL volumetric flask 1.0mL formaldehyde solution (4.2) with water to volume. 4.5 sulfur dioxide standard solution (100μg/mL). absorb the sulfur dioxide standard stock solution (4.4) 10.0mL in 100mL flask, With aqueous formaldehyde solution (4.3) to the mark. 4.6 sulfur dioxide standard solution. accurate Pipette 0.2mL, 0.5mL, 1.0mL, 2.0mL, 3.0mL, 4.0mL and 5.0mL two Sulfur dioxide standard solution (4.5) in 100mL flask, diluted with aqueous formaldehyde solution (4.3) to the mark, the standard working solution dioxide Sulfur concentrations of 0.2μg/mL, 0.5μg/mL, 1.0μg/mL, 2.0μg/mL, 3.0μg/mL, 4.0μg/mL and 5.0μg/mL. 4.7 Water phase membrane. pore size 0.22μm. 5. Apparatus 5.1 Ion Chromatography. Charged conductivity detector. 5.2 brown iodine bottle. 250mL. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 4250-2015_English be delivered?Answer: Upon your order, we will start to translate SN/T 4250-2015_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 4250-2015_English with my colleagues?Answer: Yes. The purchased PDF of SN/T 4250-2015_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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