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Updated: May 24, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
Published on: August 15, 2018
Use of a stable carbon isotope to assess the efficiency of a drinking water treatment method with CO₂
M Poberžnik1, A Leis, A Lobnik
1IOS, Institute of Environmental Protection and Sensors, Beloruska 7, SI-2000 Maribor, Slovenia. mojca.poberznik@ios.si
Abstract:
CO₂ gas with a special isotopic signature (δ¹³C = -35.2‰ vs. VPDB) was used as a marker to evaluate the efficiency of a drinking water treatment method and the effect of an ultrasonic (US) stirrer. This treatment was developed to prevent precipitation and corrosion effects in water-supply systems. The research work was performed using a laboratory-scale pilot plant that was filled with tap water. The stable isotope analyses of δ¹³C-DIC (Dissolved Inorganic Carbon) in the water samples indicated that the maximum content of added CO₂ gas in DIC was in the range of 35 to 45%. The use of the US stirrer during the entire experiment decreased the method's overall efficiency by 10%, due to degassing at a late stage of the experiment but accelerated the dissolution process in the early experimental stage.
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