2.7. Headspace analysis
Retortable plastic bags containing cup-fermented yogurt were analyzed
at every sampling point in the challenge study with yeast-like
cells as described in Section 2.4. Bags were fitted with adhesivebacked
rubber septa and a Mocon headspace analyzer (MOCON Inc.,
Minneapolis, MN) was used to quantify the percent oxygen and carbon
dioxidewithin the package. Prior to recording experimental data, atmospheric
conditions were measured as a control.