GB/T 27593-2011 English PDF

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GB/T 27593-2011: Textile dyeing and finishing auxiliaries -- Determination of free formaldehyde content of amino resin agent
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 27593-2011	209	Add to Cart	3 days	Textile dyeing and finishing auxiliaries -- Determination of free formaldehyde content of amino resin agent	Valid

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Basic data

Standard ID: GB/T 27593-2011 (GB/T27593-2011)
Description (Translated English): Textile dyeing and finishing auxiliaries -- Determination of free formaldehyde content of amino resin agent
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G70
Classification of International Standard: 71.100.40
Word Count Estimation: 9,990
Date of Issue: 2011-12-05
Date of Implementation: 2012-03-01
Quoted Standard: GB/T 601-2002; GB/T 6682-2008; GB/T 8170-2008
Adopted Standard: ISO 11402-2004, MOD
Regulation (derived from): Announcement of Newly Approved National Standards No. 19 of 2011
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the textile dyeing and finishing auxiliaries nitrogen-based resin finishing agent Determination of free formaldehyde content. This standard applies with urea, melamine and formaldehyde, glyoxal, ethylenediamine synthetic amino resin finishing agent of free formaldehyde content.

GB/T 27593-2011: Textile dyeing and finishing auxiliaries -- Determination of free formaldehyde content of amino resin agent

---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.
Textile dyeing and finishing auxiliaries. Determination of free formaldehyde content of amino resin agent ICS 71.100.40 G70 National Standards of People's Republic of China Textile dyeing and finishing auxiliaries amino resin finishing agent Determination of free formaldehyde content (ISO 11402.2004, Phenolic, aminoandcondensationresins-Determinationof freeformaldehydecontent, MOD) Issued on. 2011-12-05 2012-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard uses redrafted Law Amendment uses ISO 11402.2004 "phenolic resins, amino resins and condensation resins containing free formaldehyde Determination of the amount of "(in English), in which the ISO 11402.2004 relates to the determination of phenolic resins, furan resins and condensation resins free formaldehyde content It does not apply to textile dyeing and finishing auxiliaries industry. The standard in the structure and ISO 11402.2004, compared with more adjustment, in order to facilitate comparison, listed in Appendix A of this standard and List of international control standard clauses numbered. The existence of technical differences compared to present standards with international standards, the terms of these differences has been involved in an empty spot on the outside by the side of the page Vertical single standard line (|) were marked. In Appendix B gives a list of the technical differences and the reasons for the reference. This standard also made the following editorial changes. --- "This International Standard" by "this standard"; --- Delete foreword international standards; --- Deleted international standards Information Appendix A and Appendix B. Profile The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of dye auxiliaries Technical Committee (SAC/TC134/SC1) centralized. This standard was drafted. Zhejiang Chuan Co., Ltd. Chuan Fu Fine Chemical Co., Ltd., Zhejiang University. The main drafters of this standard. Chen Hongmei, Qushao Min, Zhao Mei, Zheng Yanyu, Li Zuguang. Textile dyeing and finishing auxiliaries amino resin finishing agent Determination of free formaldehyde content

1 Scope

This standard specifies the method for determination of the textile dyeing and finishing auxiliaries amino resin finishing agent content of free formaldehyde. This standard applies to the content of free formaldehyde with urea, melamine and formaldehyde, glyoxal, ethylene and other synthetic amino resin finishing agent Determination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this File, undated references, the latest edition (including any amendments) applies to this document. Preparation of GB/T 601-2002 Chemical Reagent standard titration solution GB/T 6682-2008 analytical laboratory use specifications and test methods (MODISO 3696. 1987) GB/T 8170-2008 revised value represents about rules and limit values \u200b\u200band judgment Principle 3 Sample formaldehyde hemiacetal with an excess of sodium sulfite solution at 0 ℃ reaction of methylol alkyl sulfonate. Drops of iodine solution After a given excess sodium sulfite, with solution of sodium carbonate decomposition hydroxy alkyl sulfonates, then decomposed iodine titration sodium sulfite. by Volume of iodine consumed calculated free formaldehyde content. Reaction equation is as follows. CH2O Na2SO3 (excess) H2O pH = 9.2 ~ 9.4 → 15min HOCH2 -SO3Na NaOH ROCH2OH Na2SO3 (excess) H2O pH = 9.2 ~ 9.4 → 15min HOCH2 -SO3Na NaOH ROH N-CH2OH Na2SO3 → 0 ℃ under test conditions do not react Na2SO3 (excess) I2 H2O pH≈ 4.5 Na2SO4 2HI HOCH2-SO3Na I2 pH≈ 4.5 Test conditions does not react HOCH2-SO3Na Na2CO3 pH≈9 ~ HCHO Na2SO3 NaHCO3 Na2SO3 I2 H2 → O Na2SO4 2HI

4 reagent material

Unless otherwise specified, use only recognized as analytical reagents and qualified chemicals and GB/T 6682-2008 stipulated three Grade water. 4.1 sodium sulfite solution, c (Na2SO3) = 1mol/L. 4.2 acetic acid solution, c (CH3COOH) = 1mol/L. ......

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