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SN/T 4250-2015 English PDF

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SN/T 4250-2015: Determination of sulfer dioxide in bamboo and wood products - Ion chromatography method
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SN/T 4250-2015English169 Add to Cart 3 days [Need to translate] Determination of sulfer dioxide in bamboo and wood products - Ion chromatography method Valid SN/T 4250-2015

PDF similar to SN/T 4250-2015


Standard similar to SN/T 4250-2015

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Basic data

Standard 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


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(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

Foreword

This 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 Chromatography

1 Scope

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.

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 SN/T 2918-2011 export detection of sulfites in foods

3 PRINCIPLE OF THE METHOD

Formaldehyde 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 materials

Unless 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.

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