GB/T 29493.5-2013Determination of harmful substances in textile dyeing and fininshing auxiliaries - Part 5: Determination of free formaldehyde in emulsion polymers (English PDF)
纺织染整助剂中有害物质的测定 第5部分：乳液聚合物中游离甲醛含量的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 11, 2012
Implementation date
September 1, 2013
Scope
GB/T 29493.5-2013 is the English-translated version of 纺织染整助剂中有害物质的测定 第5部分：乳液聚合物中游离甲醛含量的测定.
GB/T 29493.5-2013 is the Chinese standard "Determination of harmful substances in textile dyeing and fininshing auxiliaries - Part 5: Determination of free formaldehyde in emulsion polymers".
Its scope clause reads: GB/T 29493 provisions of this part of the determination of the emulsion polymers in the textile dyeing and finishing auxiliaries free formaldehyde content.
This section applies to an emulsion polymer based textile dyeing and finishing auxiliaries (mainly refers to acrylate, acrylonitrile - butadiene, carboxylated styrene - butadiene, Polyvinyl acetate, vinyl acetate - acrylate, styrene - acrylate, fluorinated acrylate polymers such as water and oil repellent) Trace Determination of free formaldehyde (including post-hydrolysis to release free formaldehyde) content. Its clauses include reagents and materials.
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Document preview — GB/T 29493.5-2013
National Standard of the People's Republic of China
- ICS
- 71.100.40
- Classification
- G 70
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 4 Reagents and materials
- 4.5 formaldehyde standard stock solution
1 Scope
GB/T 29493 provisions of this part of the determination of the emulsion polymers in the textile dyeing and finishing auxiliaries free formaldehyde content.
This section applies to an emulsion polymer based textile dyeing and finishing auxiliaries (mainly refers to acrylate, acrylonitrile - butadiene, carboxylated styrene - butadiene,
Polyvinyl acetate, vinyl acetate - acrylate, styrene - acrylate, fluorinated acrylate polymers such as water and oil repellent) Trace
Determination of free formaldehyde (including post-hydrolysis to release free formaldehyde) content.
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.
GB /2912.1-2009 Textiles - Determination of formaldehyde T - Part 1. Free and hydrolyzed formaldehyde (water extraction method)
Laboratory use specifications and test methods GB/T 6682-2008 Analysis
GB/T 8170-2008 revised value represents about rules and limit values and judgment
Principle 3
Samples of formaldehyde can be derivatized with 2,4-dinitrophenylhydrazine reagent reacts with UV absorption of 2,4 Dinitrophenylhydrozones. use
HPLC at 353nm under UV detector or diode array detector, a control standard curve, calculate the sample
Content of formaldehyde. Reaction is as follows.
4 Reagents and materials
Unless otherwise specified, use only recognized as analytical reagent and third grade water GB/T 6682-2008 stipulated.
4.1
acetonitrile chromatography.
4.2
orthophosphoric acid, 85%.
4.3
formaldehyde solution, a concentration of about 37%.
4.4
heptahydrate zinc sulfate solution, 100g/L.
4.5 formaldehyde standard stock solution
Pipette 2.5mL solution of formaldehyde (4.3) to brown volumetric flask, dilute to 1L (concentration of about
1000µg/mL), and according to GB/T 2912.1-2009 Appendix B Iodometry calibration.
NOTE. Formaldehyde standard stock solution required room temperature away from light, valid for 4 weeks.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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GB/T 29493.7-2013 — Determination of harmful substances in textile dyeing and finishing auxiliaries -- Part 7: Determination of monomeric diisocyanate in polyurethane coating agent
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