ANALYSIS OF ADIPATE ESTER CONTENTS IN POLY(VINYL CHLORIDE) PLASTICS

BY MEANS OF FT-RAMAN SPECTROSCOPY

Rolf W. Berg, Amalia Dopazo Otero

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Fourier transform (FT-) Raman spectroscopy excited with a 1064 nm laser can be used to determine the content of plasticizers in commercial flexible poly vinyl chloride (PVC) products. Our previous study [T. Nørbygaard, R.W. Berg, Analysis of phthalate ester content in PVC plastics by means of FT-Raman Spectroscopy, Appl. Spectrosc. 58 (4) (2004) 410–413]—on detection of the presence of phthalate esters in PVC by FT-Raman spectroscopy — is here extended to the similar case of adipate esters (AEs) in samples of soft poly vinyl chloride plastics. Spectra of a range of adipate ester plasticizers (11 AEs) in pure form are reported. We studied if qualitative and quantitative determination of the adipate ester content would be possible based on the use of proper reference samples. It was found that AEs as a group cannot be definitively identified by their characteristic Raman bands because other aliphatic dicarboxylic esters have very similar bands. This limits the detection as to what kind of ester and how much is present in a sample. An essential finding was however that one can use the absence of any Raman band in the 1020–1060 cm-1 range of the adipate esters, as a means to verify that a given soft PVC plastics sample does not contain significant amounts of phthalate esters because these plasticizers do have strong bands at around 1060 cm-1. Furthermore it must be remembered that bands may occur at around 1040 cm1 in a PVC sample for other reasons than phthalate ester content.
Original languageEnglish
JournalVibrational Spectroscopy
Volume42
Issue number2
Pages (from-to)222-225
ISSN0924-2031
DOIs
Publication statusPublished - 2006

Bibliographical note

Lykke Ryelund and Ole Faurskov Nielsen of the Chemistry Department, H.C. Ørsted Institute, in University of Copenhagen, are thanked for much measurement assistance. Thomas Nørbygaard from the Quantum Protein Centre QUP in the Physics Department of this University helped with data manipulation

Keywords

  • Adipate; Analysis; Ester; Fourier transform; Plasticizer; Plastics; Phthalate; PVC; Raman; Spectroscopy; Spectra

Cite this

@article{4842ce5ddb2c47cf8b072eebfbc0f252,
title = "ANALYSIS OF ADIPATE ESTER CONTENTS IN POLY(VINYL CHLORIDE) PLASTICS: BY MEANS OF FT-RAMAN SPECTROSCOPY",
abstract = "Fourier transform (FT-) Raman spectroscopy excited with a 1064 nm laser can be used to determine the content of plasticizers in commercial flexible poly vinyl chloride (PVC) products. Our previous study [T. N{\o}rbygaard, R.W. Berg, Analysis of phthalate ester content in PVC plastics by means of FT-Raman Spectroscopy, Appl. Spectrosc. 58 (4) (2004) 410–413]—on detection of the presence of phthalate esters in PVC by FT-Raman spectroscopy — is here extended to the similar case of adipate esters (AEs) in samples of soft poly vinyl chloride plastics. Spectra of a range of adipate ester plasticizers (11 AEs) in pure form are reported. We studied if qualitative and quantitative determination of the adipate ester content would be possible based on the use of proper reference samples. It was found that AEs as a group cannot be definitively identified by their characteristic Raman bands because other aliphatic dicarboxylic esters have very similar bands. This limits the detection as to what kind of ester and how much is present in a sample. An essential finding was however that one can use the absence of any Raman band in the 1020–1060 cm-1 range of the adipate esters, as a means to verify that a given soft PVC plastics sample does not contain significant amounts of phthalate esters because these plasticizers do have strong bands at around 1060 cm-1. Furthermore it must be remembered that bands may occur at around 1040 cm1 in a PVC sample for other reasons than phthalate ester content.",
keywords = "Adipate; Analysis; Ester; Fourier transform; Plasticizer; Plastics; Phthalate; PVC; Raman; Spectroscopy; Spectra",
author = "Berg, {Rolf W.} and Otero, {Amalia Dopazo}",
note = "Lykke Ryelund and Ole Faurskov Nielsen of the Chemistry Department, H.C. {\O}rsted Institute, in University of Copenhagen, are thanked for much measurement assistance. Thomas N{\o}rbygaard from the Quantum Protein Centre QUP in the Physics Department of this University helped with data manipulation",
year = "2006",
doi = "10.1016/j.vibspec.2006.05.031",
language = "English",
volume = "42",
pages = "222--225",
journal = "Vibrational Spectroscopy",
issn = "0924-2031",
publisher = "Elsevier",
number = "2",

}

ANALYSIS OF ADIPATE ESTER CONTENTS IN POLY(VINYL CHLORIDE) PLASTICS : BY MEANS OF FT-RAMAN SPECTROSCOPY. / Berg, Rolf W.; Otero, Amalia Dopazo.

In: Vibrational Spectroscopy, Vol. 42, No. 2, 2006, p. 222-225.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - ANALYSIS OF ADIPATE ESTER CONTENTS IN POLY(VINYL CHLORIDE) PLASTICS

T2 - BY MEANS OF FT-RAMAN SPECTROSCOPY

AU - Berg, Rolf W.

AU - Otero, Amalia Dopazo

N1 - Lykke Ryelund and Ole Faurskov Nielsen of the Chemistry Department, H.C. Ørsted Institute, in University of Copenhagen, are thanked for much measurement assistance. Thomas Nørbygaard from the Quantum Protein Centre QUP in the Physics Department of this University helped with data manipulation

PY - 2006

Y1 - 2006

N2 - Fourier transform (FT-) Raman spectroscopy excited with a 1064 nm laser can be used to determine the content of plasticizers in commercial flexible poly vinyl chloride (PVC) products. Our previous study [T. Nørbygaard, R.W. Berg, Analysis of phthalate ester content in PVC plastics by means of FT-Raman Spectroscopy, Appl. Spectrosc. 58 (4) (2004) 410–413]—on detection of the presence of phthalate esters in PVC by FT-Raman spectroscopy — is here extended to the similar case of adipate esters (AEs) in samples of soft poly vinyl chloride plastics. Spectra of a range of adipate ester plasticizers (11 AEs) in pure form are reported. We studied if qualitative and quantitative determination of the adipate ester content would be possible based on the use of proper reference samples. It was found that AEs as a group cannot be definitively identified by their characteristic Raman bands because other aliphatic dicarboxylic esters have very similar bands. This limits the detection as to what kind of ester and how much is present in a sample. An essential finding was however that one can use the absence of any Raman band in the 1020–1060 cm-1 range of the adipate esters, as a means to verify that a given soft PVC plastics sample does not contain significant amounts of phthalate esters because these plasticizers do have strong bands at around 1060 cm-1. Furthermore it must be remembered that bands may occur at around 1040 cm1 in a PVC sample for other reasons than phthalate ester content.

AB - Fourier transform (FT-) Raman spectroscopy excited with a 1064 nm laser can be used to determine the content of plasticizers in commercial flexible poly vinyl chloride (PVC) products. Our previous study [T. Nørbygaard, R.W. Berg, Analysis of phthalate ester content in PVC plastics by means of FT-Raman Spectroscopy, Appl. Spectrosc. 58 (4) (2004) 410–413]—on detection of the presence of phthalate esters in PVC by FT-Raman spectroscopy — is here extended to the similar case of adipate esters (AEs) in samples of soft poly vinyl chloride plastics. Spectra of a range of adipate ester plasticizers (11 AEs) in pure form are reported. We studied if qualitative and quantitative determination of the adipate ester content would be possible based on the use of proper reference samples. It was found that AEs as a group cannot be definitively identified by their characteristic Raman bands because other aliphatic dicarboxylic esters have very similar bands. This limits the detection as to what kind of ester and how much is present in a sample. An essential finding was however that one can use the absence of any Raman band in the 1020–1060 cm-1 range of the adipate esters, as a means to verify that a given soft PVC plastics sample does not contain significant amounts of phthalate esters because these plasticizers do have strong bands at around 1060 cm-1. Furthermore it must be remembered that bands may occur at around 1040 cm1 in a PVC sample for other reasons than phthalate ester content.

KW - Adipate; Analysis; Ester; Fourier transform; Plasticizer; Plastics; Phthalate; PVC; Raman; Spectroscopy; Spectra

U2 - 10.1016/j.vibspec.2006.05.031

DO - 10.1016/j.vibspec.2006.05.031

M3 - Journal article

VL - 42

SP - 222

EP - 225

JO - Vibrational Spectroscopy

JF - Vibrational Spectroscopy

SN - 0924-2031

IS - 2

ER -