PMID- 11407757
OWN - NLM
STAT- MEDLINE
DCOM- 20010628
LR  - 20041117
IS  - 0265-203X (Print)
IS  - 0265-203X (Linking)
VI  - 18
IP  - 6
DP  - 2001 Jun
TI  - Phosphite additives and their transformation products in polyethylene packaging 
      for gamma-irradiation.
PG  - 581-91
AB  - Infrared (IR) spectroscopy has been used to identify and quantify the phosphite 
      antioxidant, tris(2,4-di-tert.butylphenyl) phosphite, and its corresponding 
      phosphate in high density polyethylene (HDPE) food trays, both in the original, 
      commercial trays and also as a function of gamma-irradiation and 
      post-irradiation, storage conditions. This direct method of inhibitor analysis 
      complements time-consuming (some times non-quantitative) extraction methods, 
      which for organo-phosphites are complicated by their facile conversion to 
      phosphates by peroxidic impurities in the solvent. Because of the complete 
      destruction of phosphite to give mainly phosphate at quite low gamma-irradiation 
      doses (approximately 5 kGy) and phosphate formation during melt processing and 
      radiation sterilization of these HDPE trays must take into account products from 
      the irradiation of phosphate. Any residual phosphite is lost progressively in 
      post-irradiation reactions, which are complex, producing a less than-quantitative 
      yield of phosphate.
FAU - Carlsson, D J
AU  - Carlsson DJ
AD  - National Research Council of Canada (ICPET), Ottawa, Ontario. 
      dave.carlsson@nrc.ca
FAU - Krzymien, M E
AU  - Krzymien ME
FAU - Deschenes, L
AU  - Deschenes L
FAU - Mercier, M
AU  - Mercier M
FAU - Vachon, C
AU  - Vachon C
LA  - eng
PT  - Journal Article
PL  - England
TA  - Food Addit Contam
JT  - Food additives and contaminants
JID - 8500474
RN  - 0 (Phosphites)
RN  - 9002-88-4 (Polyethylene)
SB  - IM
MH  - Chromatography, High Pressure Liquid
MH  - *Food Irradiation
MH  - *Food Packaging
MH  - *Gamma Rays
MH  - Humans
MH  - Phosphites/chemistry/*radiation effects
MH  - *Polyethylene
MH  - Spectroscopy, Fourier Transform Infrared/methods
EDAT- 2001/06/16 10:00
MHDA- 2001/06/29 10:01
CRDT- 2001/06/16 10:00
PHST- 2001/06/16 10:00 [pubmed]
PHST- 2001/06/29 10:01 [medline]
PHST- 2001/06/16 10:00 [entrez]
AID - 10.1080/02652030120109 [doi]
PST - ppublish
SO  - Food Addit Contam. 2001 Jun;18(6):581-91. doi: 10.1080/02652030120109.