I just ran across these two articles and thought they might be of interest:
Washing and Sanitizing Home Winemaking and Brewing Equipment:
http://www.better-bottle.com/pdf/WashingSanitizingStudy.pdf
Measurement of Oxygen Transfer Rates for Carboy Closures and Air Locks
http://www.better-bottle.com/pdf/Closures_Oxygen_Passage_Study.pdf
Washing and Sanitizing Home Winemaking and Brewing Equipment:
http://www.better-bottle.com/pdf/WashingSanitizingStudy.pdf
Measurement of Oxygen Transfer Rates for Carboy Closures and Air Locks
http://www.better-bottle.com/pdf/Closures_Oxygen_Passage_Study.pdf