For packaging experiments, CO2 and O2
levels were analyzed in each package using
a headspace analyzer (model 6600; Illinois
Instruments, Johnsburg, IL). Packages were
fitted with septa for gas sampling. Measurements
were taken for each replicate of all
package types at the beginning of experiments
and at 2- to 3-d intervals until the end
of shelf life. Gas measurements were ended
for box, MP, and CL packages at day 9, when
results indicated no differences from ambient
atmosphere.