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Identification and Quantitation of Volatile Organic Compounds in Poly(methyl methacrylate) Kitchen Utensils by Headspace Gas Chromatography/Mass Spectrometry.

Journal of AOAC International (2015-04-24)
Hiroyuki Ohno, Motoh Mutsuga, Yoko Kawamura
ABSTRACT

A headspace GC/MS method was developed for identification and quantitation of residual volatile organic compounds in poly(methyl methacrylate) (PMMA) kitchen utensils. A sample was cut into small pieces, then N,N-dimethylacetamide was added in a headspace vial and sealed. After storing for more than 1 day at room temperature, the vial was incubated for 1 h at 90°C, and the headspace gas was analyzed by GC/MS. In 24 PMMA kitchen utensils, 16 volatile organic compounds including methyl methacrylate, methyl acrylate, toluene, 2-methyl-1-butene, 2-methyl-2-butene, 2-methylpropanal, methyl propionate, methyl isobutyrate, trans-3-heptene, heptane, cis-3-heptene, trans-2-heptene, cis-2-heptene, 2,4,4-trimethyl-1-pentene, 2,4,4-trimethyl-2-pentene, and 1-octene were identified and quantitated. These 15 volatile compounds except methyl methacrylate were found for the first time in PMMA kitchen utensils. Recovery rates from spiked samples were 97.4-104.0% with CV values of 2.8-9.6%. Samples contained 190-7900 μg/g of methyl methacrylate, 26-810 μg/g of methyl acrylate, and 2-1300 μg/g of toluene; other compounds were at levels less than 100 μg/g. Methyl methacrylate was the main monomer of PMMA and methyl acrylate was a comonomer; toluene should be used as a solvent.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Toluene, anhydrous, 99.8%
Sigma-Aldrich
N,N-Dimethylacetamide, anhydrous, 99.8%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Toluene, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.7% (GC)
Sigma-Aldrich
N,N-Dimethylacetamide, ReagentPlus®, ≥99%
Sigma-Aldrich
N,N-Dimethylacetamide, suitable for HPLC, ≥99.9%
Sigma-Aldrich
Toluene, suitable for HPLC, 99.9%
Sigma-Aldrich
Toluene, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%
Sigma-Aldrich
N,N-Dimethylacetamide, puriss. p.a., ≥99.5% (GC)
Sigma-Aldrich
N,N-Dimethylacetamide, ReagentPlus®, 99%
Supelco
Toluene, analytical standard
Supelco
Residual Solvent - Toluene, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Toluene, Pharmaceutical Secondary Standard; Certified Reference Material
SAFC
N,N-Dimethylacetamide
Sigma-Aldrich
Toluene, Laboratory Reagent, ≥99.3%
Supelco
N,N-Dimethylacetamide, analytical standard
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Supelco
2-Methyl-1-butene, analytical standard
Sigma-Aldrich
N,N-Dimethylacetamide, suitable for peptide synthesis, ≥99.8% (GC)
Supelco
1-Octene, analytical standard
Sigma-Aldrich
1-Octene, 98%
Sigma-Aldrich
N,N-Dimethylacetamide, spectrophotometric grade, ≥99%
Sigma-Aldrich
N,N-Dimethylacetamide-d9, 99 atom % D
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Toluene, suitable for HPLC, ≥99.9%
Sigma-Aldrich
trans-2-Heptene, 99%
Supelco
Toluene, HPLC grade, 99.8%

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