GB/T 35772-2017Rapid detection of phthalate esters in polyvinyl chloride products - Infra-red spectrometric method (English PDF)
聚氯乙烯制品中邻苯二甲酸酯的快速检测方法 红外光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2017
Implementation date
April 1, 2018
Scope
GB/T 35772-2017 is the English-translated version of 聚氯乙烯制品中邻苯二甲酸酯的快速检测方法 红外光谱法.
GB/T 35772-2017 is the Chinese standard "Rapid detection of phthalate esters in polyvinyl chloride products - Infra-red spectrometric method".
Its scope clause reads: This standard specifies the principle of using infrared spectroscopy to quickly detect phthalate plasticizers in PVC products, reagents and materials, Equipment, qualitative screening, quantitative analysis and calculation of results This standard applies to the total content of phthalates not less than 1% of the qualitative and quantitative detection of PVC materials.
Its clauses include principle; reagents and materials; equipment; qualitative screening.
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Document preview — GB/T 35772-2017
National Standard of the People's Republic of China
- ICS
- 83.040.30
- Classification
- G 31
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 principle
- 4 Reagents and materials
- 5 equipment
- 6 qualitative screening
1 Scope
This standard specifies the principle of using infrared spectroscopy to quickly detect phthalate plasticizers in PVC products, reagents and materials,
Equipment, qualitative screening, quantitative analysis and calculation of results
This standard applies to the total content of phthalates not less than 1% of the qualitative and quantitative detection of PVC materials.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 6040-2002 General rules of infrared spectrometry
3 principle
Preparing a series of standard samples containing phthalate plasticizers, using infrared spectrometer to collect the infrared spectrum data of the standard, according to the standard red
Partial Least Squares (PLS) stoichiometry model was established for the characteristic peaks of external spectra, and then the infrared spectra of unknown samples were scanned.
1580cm-1 and 1600cm-1 ring skeleton characteristic absorption peak qualitative analysis, and then using the stoichiometric model of unknown samples of o-benzene two
Formate plasticizer total content.
4 Reagents and materials
4.1
Phthalate standards Purity >=98%, see Appendix A.
4.2
Non-phthalate plasticizers Dioctyl terephthalate (DOTP) and trioctyl trimellitate (TOTM), purity >=97%.
4.3
standard sample with polyvinyl chloride (PVC) resin.
4.4 Tetrahydrofuran (THF)
Spectral purity.
5 equipment
5.1
Fourier transform infrared spectrometer in line with the provisions of GB/T 6040-2002 4.2.1.
5.2 Attenuated Total Reflection (ATR) Accessories
The test crystal is germanium (Ge) crystal.
5.3 Analytical balance
Accuracy of 0.01mg.
5.4
Drying oven temperature fluctuations ± 2 °C.
6 qualitative screening
6.1 sample preparation
Take a flat surface of the test sample, so that it can be close to the ATR attachment crystal surface.
......
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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