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1 Acta Chromatographica

1 2006

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Use of combined ion-exclusion and cation-exchange chromatography to study photooxidation of ionic nitrogen compounds on a titanium dioxide photocatalyst

Mori M., Taoda H., Itabashi H., Ikedo M., Tanaka K.

Acta Chromatographica

2006

No. 16

28-37

Combined ion-exclusion and cation-exchange chromatography (IEC/CEC) on a weakly acidic cation-exchange resin in the H+-form (TSKgel Super IC-A/C) has been used as an advanced method for evaluation of the photooxidation of ionic nitrogen compounds, for example triethanolamine, trimethylamine, and urea, on a TiO2 photocatalyst. Formation of NH4+ and NO3- from each nitrogen compound by photooxidation on the catalyst du-ring UV irradiation was successfully monitored by use of IEC/CEC under optimized mobile-phase conditions (6 mM tartaric acid and 3 mM 18-crown-6). It was found that the products formed depended on whether or not a mole-cule contained a hydroxylated nitrogen moiety or other hydroxyl group.