PMID- 15212896
OWN - NLM
STAT- MEDLINE
DCOM- 20041005
LR  - 20091119
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 56
IP  - 6
DP  - 2004 Aug
TI  - Comparison of two methods for obtaining degradation half-lives.
PG  - 531-5
AB  - Given the paucity of experimental degradation half-life data for most organic 
      chemicals, there is a compelling incentive to use available estimation software 
      when undertaking assessments of chemical persistence and mass balance modeling 
      studies. In this study, half-life data obtained from estimation software for a 
      set of 233 organic chemicals in air, water, soil and sediments were shown to 
      differ significantly from half-life data listed in handbooks. It is suggested 
      that the widely available and used estimation software, EPIWIN (Estimations 
      Program's Interface for Windows), overestimates the reactivity of persistent 
      organic pollutants (POPs). Reasons for this overestimation are explored. It is 
      concluded that the maximum "default half-life values" used by the EPIWIN software 
      are too short for estimating half-lives of highly persistent chemicals such as 
      PCBs. There is a need for estimation software such as EPIWIN to be more 
      thoroughly calibrated against experimental derived half-life data for a wide 
      range of chemicals, including potential POPs, thus improving their reliability.
FAU - Gouin, Todd
AU  - Gouin T
AD  - Canadian Environmental Modelling Centre, Trent University, Peterborough, ON, 
      Canada.
FAU - Cousins, Ian
AU  - Cousins I
FAU - Mackay, Don
AU  - Mackay D
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Environmental Pollutants)
RN  - 0 (Organic Chemicals)
SB  - IM
MH  - Chemistry Techniques, Analytical/*methods
MH  - Environmental Pollutants/*analysis
MH  - Half-Life
MH  - Organic Chemicals/*analysis/chemistry
MH  - Reference Standards
MH  - Software
EDAT- 2004/06/24 05:00
MHDA- 2004/10/06 09:00
CRDT- 2004/06/24 05:00
PHST- 2003/10/17 00:00 [received]
PHST- 2004/03/02 00:00 [revised]
PHST- 2004/04/20 00:00 [accepted]
PHST- 2004/06/24 05:00 [pubmed]
PHST- 2004/10/06 09:00 [medline]
PHST- 2004/06/24 05:00 [entrez]
AID - S0045-6535(04)00286-3 [pii]
AID - 10.1016/j.chemosphere.2004.04.018 [doi]
PST - ppublish
SO  - Chemosphere. 2004 Aug;56(6):531-5. doi: 10.1016/j.chemosphere.2004.04.018.