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SN/T 3939-2014 PDF English

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SN/T 3939-2014: Food contact materials - Wood material - Determination of oxidizing residues in cork stoppers - Iodometric titration method
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
SN/T 3939-2014	English	154	Add to Cart	3 days [Need to translate]	Food contact materials - Wood material - Determination of oxidizing residues in cork stoppers - Iodometric titration method

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Basic data

Standard ID	SN/T 3939-2014 (SN/T3939-2014)
Description (Translated English)	Food contact materials - Wood material - Determination of oxidizing residues in cork stoppers - Iodometric titration method
Sector / Industry	Commodity Inspection Standard (Recommended)
Classification of Chinese Standard	X08
Classification of International Standard	67.250
Word Count Estimation	8,869
Date of Issue	4/9/2014
Date of Implementation	11/1/2014
Quoted Standard	GB/T 601; GB/T 6682
Adopted Standard	ISO 21128-2006, IDT
Regulation (derived from)	State inspection certification (2014) 210
Issuing agency(ies)	General Administration of Customs
Summary	This standard specifies the method for the detection of food contact materials cork wood oxide residue. This standard applies to the determination of food contact materials cork wood oxide residue.

Similar standards

GB 13432| SN/T 3390| GB/T 23887|SN/T 3940|

SN/T 3939-2014: Food contact materials - Wood material - Determination of oxidizing residues in cork stoppers - Iodometric titration 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.
(Food contact materials cork wood residues measured oxidation iodometric titration) People's Republic of China Entry-Exit Inspection and Quarantine Standards Food contact materials - wood cork Determination of the oxidation residue iodometric titration (ISO 21128.2006, Corkstoppers-Determinationofoxidizing residues-Iodometrictitrationmethod, IDT) Issued on. 2014-04-09 2014-11-01 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. This standard is identical with ISO 21128.2006 "Determination of residue cork oxide Iodometry." This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Fujian Exit Inspection and Quarantine. The main drafters of this standard. Jiang Xiaoli, Liang Ming, Chen Jinfeng, Tang Xi, Cao Guoqing, Tang Hong, Chen Min reality. Food contact materials - wood cork Determination of the oxidation residue iodometric titration

1 Scope

This standard specifies the method for the detection of food contact materials cork wood oxide residue. This standard applies to the determination of food contact materials cork wood oxide residue.

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. Preparation of GB/T 601 chemical reagent standard titration solution Laboratory use specifications and test methods GB/T 6682 Analysis

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Oxide residue oxidizingresidues For cork bleaching effect of the bleaching product residue.

4 Method summary

Titration with thiosulfate to sulfide under acidic conditions is cork peroxide oxidation precipitated iodine test to obtain a residual amount of the oxide.

5 Sampling

Select at least eight cork representative sample for subsequent tests.

6 Reagents and materials

Unless otherwise specified, all reagents were of analytical grade should, in line with water as a water GB/T 6682 stipulated. 6.1 KI, AR. 6.2 heptamolybdate amines, AR. 6.3 of concentrated sulfuric acid, density 1.84g/mL. 6.4 acetic acid (99.5%). 6.5 potassium iodide solution (50g/L). Weigh 50g KI dissolved in water and diluted to 1000mL. 6.6 ammonium heptamolybdate solution (3%). weigh 3g heptamolybdate amine, volume 100mL. 6.7 sulfuric acid solution (25%). amount of 164mL of concentrated sulfuric acid slowly into approximately 700mL of water, cooled, diluted to 1000mL. ...

SN/T 3939-2014 Cover page