NOSA Testing for CO2 analysis and testing is now accredited

When it comes to beverages, carbon dioxide (CO2) provides effervescence, a level of acidity and some protection against microbiological growth without the beverage looking, smelling or tasting strange, and without any undesirable levels of trace impurities. The food industry also employs carbon dioxide for food processing applications, such as chilling and freezing, modified atmosphere packaging and temperature control for products being stored and transported.


Why CO2 is essential to food processing

Carbon dioxide (CO2) helps preserve packaged food, by reducing the amount of oxygen inside the sealed package. Gas flushing or Modified Atmosphere Packaging, as the process is called, also reduces the amount of processing that food must undergo. This preserves the quality and nutrient content of meats, vegetables, and other foods.

CO2 as an essential preservative in soft drinks

Carbon dioxide acts as a preservative, by preventing fermentation and inhibiting the growth of mould and bacteria. In order to comply with strict beverage industry standards, there in the production of soft drinks only beverage/food grade CO2 is allowed.

CO2 in cold storage

Solid carbon dioxide (usually called ‘dry ice’) is commonly used for refrigeration because of its properties, which include sublimation. Sublimation is a process in which a solid gets converted directly in to gaseous state other than liquid when exposed to certain temperatures.

As we know, we obtain CO2 as a bi-product and it must therefore undergo effective purification for suitability as a direct food additive in beverages. Gas suppliers must identify, measure and control the levels of trace impurities in the purified CO2, and similarly, carbon dioxide users have a responsibility to take appropriate steps to ensure that suppliers have met this responsibility.

NOSA Testing’s methodologies and facilities for CO2 testing are now accredited, by SANAS under ISO 17025.

NOSA Testing is equipped to provide chemical testing for all CO2 methods, including the following:

CO2 – 204 Determination of total sulphurs in carbon dioxide (CO2),
CO2 – 205 Determination of permanent gases in carbon dioxide (CO2)
CO2 – 208 Determination of BTEX and hydrocarbons except 1-Butene in carbon dioxide (CO2)
CO2 – 209 Determination of purity of carbon dioxide (CO2) by the Caustic Absorption Method


Should you require any additional information on our capabilities relating to comprehensive CO2 analysis contact Keshav Beachen (NOSA Testing National sales manager) at