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Thermal behaviour of iminodiacetic, oxydiacetic and thiodiacetic acids

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Abstract

The thermal decomposition of iminodiacetic, oxydiacetic, and thiodiacetic acids in helium atmosphere has been studied by means of thermogravimetry (TG), differential thermal analysis (DTA) and temperature-programmed pyrolysis directly coupled with mass spectrometry (TPPy-MS). Evolved gas analysis (EGA) profiles of iminodiacetic and oxydiacetic acids were obtained and compared with TG and DTA profiles.

The decomposition of iminodiacetic acid forms water, CO, CO2, CH3CN, HCN and some hydrocarbons. After water evolution a cyclic anhydride is formed, as well as for oxydiacetic acid. Thiodiacetic acid vaporizes without decomposition.

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Correspondence to Vinciguerra1 V .

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Vinciguerra1, V., Bucci, R., Marini, F. et al. Thermal behaviour of iminodiacetic, oxydiacetic and thiodiacetic acids . J Therm Anal Calorim 83, 475–478 (2006). https://doi.org/10.1007/s10973-005-6939-6

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  • DOI: https://doi.org/10.1007/s10973-005-6939-6

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