Abstract
The aim of this work was to characterize and to quantify ozonation by-products of glucose in ultra-pure water ([Glucose]o = 5 mmol l−1; initial pH: ≈ 6, final pH: ≈ 3). HPLC and GC analyses showed that ozonation of glucose yields mainly gluconic acid (0.6 – 0.7 mole / mole of glucose eliminated) and formic acid (0.2 – 0.25 mole / mole of glucose eliminated) at the beginning of the reaction. Glycolic acid, formaldehyde and peroxides were also formed for low ozone dosages. GC/MS analyses carried out on extracts from ozonated solutions of glucose and gluconic acid (90–95% removal of the initial organic compound) allowed the identification of several by-products wih six carbon atoms (hexosuloses, glucuronic and glucaric acids) and with less carbon atoms (acids and aldehydes).
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