Characterization of volatile radiolysis products in radiation-sterilized plastics by thermal desorption–gas chromatography–mass spectrometry: screening of six medical polymers

Buchalla, Rainer; Boess, Christian; Bögl, K. W.

doi:10.1016/s0969-806x(99)00311-4

Cited by 43 publications

(32 citation statements)

References 27 publications

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“…Other phenol conversion products can be expected to be grafted to the HDPE or to be dimeric species of low volatility (Pospisil 1980, Buchalla et al 1999.…”

Section: Discussionmentioning

confidence: 99%

Analyses of volatile transformation products from additives in gamma-irradiated polyethylene packaging

Krzymien¹,

Carlsson²,

Deschênes³

et al. 2001

Food Add. Contaminants

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Thermal desorption, followed by gas chromatography (GC) with mass spectrometry (MS) detection, has been found to allow the rapid identification of volatile products resulting from the gamma-irradiation of stabilized, high density polyethylene packaging and pure stabilizers. The stabilizers were tris(2,4-di-tert.butylphenyl) phosphite, octadecyl beta-(2,6-di-tert.butylphenol)-propionate and 2,4-di-tert.butylphenol, the latter resulting from phosphite hydrolysis. Thermal desorption indicated the formation and release of tert.butylbenzenes, such as 1,3-di-tert.butylbenzene upon gamma-irradiation of the HDPE. From a comparison of the products from gamma-irradiation of additive-free polyethylene, of various pure stabilizers and of related compounds, the tert.butylbenzenes were confirmed to result from the irradiation of the phosphite stabilizer and its phosphate conversion product. Thermal desorption off-line, in which volatiles released by a sample are trapped in sorbents for subsequent desorption in the heated GC inlet, is found to be a fast, extremely sensitive method that can be used to guide and supplement analyses of compounds extracted by foodstuffs.

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“…Other phenol conversion products can be expected to be grafted to the HDPE or to be dimeric species of low volatility (Pospisil 1980, Buchalla et al 1999.…”

Section: Discussionmentioning

confidence: 99%

Analyses of volatile transformation products from additives in gamma-irradiated polyethylene packaging

Krzymien¹,

Carlsson²,

Deschênes³

et al. 2001

Food Add. Contaminants

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“…The presence of benzene derivatives as radiolysis products of packaging materials constitutes a potential problem given that benzene and some of its derivatives are toxic and/or carcinogens as has been reported by several authors (Marque et al 1998;Buchalla et al 1999Buchalla et al , 2000Riganakos et al 1999;Chytiri et al 2005). …”

Section: Radiolysis Productsmentioning

confidence: 95%

“…Chytiri et al according to the same authors, aldehydes and ketones are considered to be oxidation products resulting from the reaction with oxygen in air during irradiation, while the formation hydrocarbons during irradiation is caused by the breakdown of short branches of polyethylene. Buchalla et al (1999) identified hydrocarbons, aldehydes, ketones and carboxylic acids as radiolysis products from PE by thermal desorption-GC/MS, while some amides (mainly pentanamide) were identified from PA. Byun et al (2007) detected several alcohols as volatile radiolysis compounds due to irradiation degradation of -irradiated EVOH films at doses up to 30 kGy. studied the effect of e-beam irradiation in polypropylene syringes at 30, 60 and 120 kGy.…”

Section: Radiolysis Productsmentioning

confidence: 99%

Radiolysis products and sensory properties of electron-beam-irradiated high-barrier food-packaging films containing a buried layer of recycled low-density polyethylene

Chytiri

Badeka

Riganakos

et al. 2010

Food Additives & Contaminants: Part A

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To cite this version:Stavroula Chytiri, Anastasia Badeka, Kyriakos Riganakos, Michael Kontominas. Radiolysis products and sensory properties of electron-beam irradiated high barrier food packaging films containing a buried layer of recycled low density polyethylene. Food Additives and Contaminants, 2010, 27 (04) The aim of the present work was to study the effect of electron-beam irradiation on 16 the production of radiolysis products and sensory changes in experimental high barrier 17 packaging films composed of polyamide (PA), ethylene-vinyl alcohol (EVOH) and 18 low density polyethylene (LDPE). Films contained a middle buried layer of recycled 19 low density polyethylene (LDPE), while films containing 100% virgin LDPE as the 20 middle buried layer were taken as controls. Irradiation doses ranged between 0 and 60 21 kGy. Generally, a large number of radiolysis products were produced during e-beam 22 irradiation even at the lower absorbed doses of 5 and 10 kGy (approved doses for food 23 "cold pasteurization"). The quantity of radiolysis products increased with irradiation 24dose. There were no significant differences in radiolysis products identified between 25 samples containing a recycled layer of LDPE and those containing virgin LDPE (all 26

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“…This technique has been recently utilized for analysis of irradiated polymers used in medical devices (Buchalla et al 1999).…”

Section: Figure 1 Gas Chromatogram S Of Headspace Gas In the Empty Vmentioning

confidence: 99%

Volatile and non-volatile compounds in irradiated semi-rigid crystalline poly(ethylene terephthalate) polymers

Komolprasert

Mcneal

Agrawal

et al. 2001

Food Additives and Contaminants

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In this study two different semi-rigid crystalline and oriented polyethylene terephthalate materials were used and were irradiated at 25-kGy dose at room temperature by using a caesium137 radiator. Volatile and non-volatile compounds present in the irradiated materials were identified and quantified. The qualitative results obtained from HS/GC/TCD/FID analysis at room temperature showed volatiles could not be identified. The HS/GC/MSD analysis performed at 106 degrees C showed that the irradiation generated 668-742 micrograms/kg formic acid, 868-922 micrograms/kg acetic acid, 17-32 micrograms/kg 1,3-dioxolane, and 47-71 micrograms/kg 2-methyl-1, 3-dioxolane based on PET weight. The results obtained from the thermal desorption and GC/MSD performed at 200 degrees C showed that 10-12 mg/kg acetaldehyde, 479-975 micrograms/kg 1,3-dioxolane, and 6.6-11.2 mg/kg methyl-1, 3-dioxolane were detected after irradiation. The concentrations of the two dioxolanes found from thermal desorption were much higher than those observed in the HS, although formic and acetic acids were not detected. It is possible that the formic and acetic acids produced by irradiation underwent further reactions with ethylene glycol during thermal desorption to form the dioxolanes. The soluble solid extracted from various PET specimens before and after irradiation were in a range of 0.67-0.78%. PET cyclic trimer is the major component and is present at 0.41-0.50%, accounting for more than 50% of the percent total solid in PET. Statistically, irradiation did not increase the soluble solid and cyclic trimer. The overall results suggest that 25-kGy irradiation had a significant effect on increasing the volatile but not the non-volatile compounds detected in the PET specimens.

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Characterization of volatile radiolysis products in radiation-sterilized plastics by thermal desorption–gas chromatography–mass spectrometry: screening of six medical polymers

Cited by 43 publications

References 27 publications

Analyses of volatile transformation products from additives in gamma-irradiated polyethylene packaging

Analyses of volatile transformation products from additives in gamma-irradiated polyethylene packaging

Radiolysis products and sensory properties of electron-beam-irradiated high-barrier food-packaging films containing a buried layer of recycled low-density polyethylene

Volatile and non-volatile compounds in irradiated semi-rigid crystalline poly(ethylene terephthalate) polymers

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