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Behaviour of I/Br/Cl-THMs and their projected toxicities under simulated cooking conditions: Effects of heating, Table salt and residual chlorine

Research paper by Mingquan Yan, Mingyang Li, Xuze Han

Indexed on: 13 Apr '16Published on: 13 Apr '16Published in: Journal of Hazardous Materials



Abstract

This study examined the effects of heating, residual chlorine and concentration of Table salt on the generation of iodine-, bromine- and chlorine-containing trihalomethanes (THMs) under simulated cooking conditions. In the case of addition of either KI- or KIO3-fortified salt, total I-THM concentrations increased with increasing iodine concentration, while total Cl/Br-THM concentrations decreased. CHCl2I, CHBrClI, CHBrI2, CHBr2I and CHI3 were formed in the presence of KI salt, while only CHCl2I was formed in the presence of KIO3 salt. CHCl2I was unstable under cooking conditions, and >90% of this DBP was removed during heating, which in some cases increased the concentrations of the other I-THMs.

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