5.2.3 Reagent water for volatile extractions may also be
prepared by boiling water for 15 minutes. Subsequently,
while maintaining the water temperature at 90 + 5 degrees
C, bubble a contaminant-free inert gas (e.g. nitrogen)
through the water for 1 hour. While still hot, transfer
the water to a narrow mouth screw-cap bottle under zero-headspace
and seal with a Teflon-lined septum and cap.