Application Note: Measure Oxygen And Carbon Dioxide From The Same Package

The complete measurement system from Hach Ultra consists of one Orbisphere package sampler (model no. 29972), one portable oxygen analyzer (model no. 3650/113) and one portable carbon dioxide analyzer (model no. 3658/418). These are plumbed in series as shown in the installation diagram on the next page. An AC/DC power supply is used for each portable analyzer to ensure uninterrupted power.

To measure O2 and CO2 from the same wine bottle, the cork or stelvin must first be removed. For still wines, there is no risk of air exchange between the bottle and ambient air if the package is handled gently and not agitated. For sparkling wines, chilling the bottles below 11°C can minimize CO2 gas release.

The open bottle should then be presented to a package sampler, which uses a tapered rubber stopper to properly seal the bottle. Nitrogen forcing-gas is used to push the product past both sensors for measurement. For still and sparkling wine, nitrogen-forcing gas is set to 2 and 5 bar, respectively.

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