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Standard tonic water

  • Drink: Standard tonic water
  • Objective: Increase the carbonation level
  • Date: March 24


  • To increase the carbonation levels of tonic water

Sample Preparation

  • Tonic without CO2Sustain® was re-carbonated on an Armfield carbonator to 8.5g/l (sample A)
  • Tonic with 0.1g/l CO2Sustain® was re-carbonated on an Armfield carbonator to 8.5g/l (sample B)
  • Samples were filled into glass bottles and refrigerated overnight

Test Methods

  • A sensory panel (8 people) completed a blind taste test where the participants were asked whether the Sustain sample (A) was:
    • Less fizzy than sample B
    • Fizzier than sample B
    • No difference
  • The bottles were then tested for carbon dioxide loss on pouring
  • The 275ml sample bottle was poured gently into a glass vessel on an analytical balance
  • The weight of CO2 lost was recorded over a 30-minute period

Results – Sensory

  • Of the 8 panelists, 8 people recorded the sample with CO2Sustain® as being fizzier
  • Nobody recorded no difference

Results – Carbon Dioxide Retention on Pouring

  • The graph shows that the sample with CO2Sustain® retained more CO2 when poured
  • At the point of pouring, the sample without CO2Sustain® dropped to 6.5g whereas the drink with CO2Sustain® only dropped to 7.1g
  • The final level of carbon dioxide retained after 30-minutes was 1.4g extra with CO2Sustain® (31%)


      • The addition of CO2Sustain gives the consumer a much fizzier drink experience over 30-minutes

Download the report here.

If you would like us to do a similar report on one of your drinks please get in touch either by emailing or calling us on +44 (0)113 205 0971