Influence of dough ingredients on 3-chloropropane-1,2-diol (3-MCPD) formation in toast

The influence of different dough ingredients such as fat, salt, sourdough, emulsifiers, and sugar on the formation of 3-chloropropane-1,2-diol (3-MCPD) during toast preparation under domestic conditions was investigated. In comparison with a fat-free recipe, addition of 1% peanut fat considerably increased 3-MCPD formation, but varying the fat (2–5%) or salt (1.6–2.4%) contents within technological acceptable limits did not show any significant differences. A baking agent, which is usually commercially applied by many toast bakers or industrial toast manufacturers, increased 3-MCPD formation in toasted bread slices. Considerable evidence was found that the baking agent's main component sucrose had the major part in increasing 3-MCPD levels. Emulsifiers containing monoacylglycerols moderately increased 3-MCPD levels, but the addition of lecithin did not have any significant influence. 3-MCPD levels showed a good correlation with the lightness (L* value) of the bread slices; their 3-MCPD content increased exponentially towards dark coloured toasts. The relation between 3-MCPD and 2-MCPD was an average of 3:1 in all samples. Dichloropropanols such as, for example, 1,3-dichloropropanol could not be detected.

[1]  D. Gray,et al.  Generation of monochloropropanediols (MCPDs) in model dough systems. 1. Leavened doughs. , 2004, Journal of agricultural and food chemistry.

[2]  D. Gray,et al.  Generation of monochloropropanediols (MCPDs) in model dough systems. 2. Unleavened doughs. , 2004, Journal of agricultural and food chemistry.

[3]  M. Fellows,et al.  In vivo genotoxicity studies with 3-monochloropropan-1,2-diol. , 2003, Mutagenesis.

[4]  D. Gray,et al.  Influence of composition, moisture, pH and temperature on the formation and decay kinetics of monochloropropanediols in wheat flour dough , 2003 .

[5]  C. Breitling-Utzmann,et al.  3-MCPD: Occurrence in bread crust and various food groups as well as formation in toast , 2003 .

[6]  C. Crews,et al.  Occurrence of 3-chloro-propane-1,2-diol (3-MCPD) and related compounds in foods: a review , 2002, Food additives and contaminants.

[7]  C. Crews,et al.  Survey of 3-monochloropropane-1,2-diol (3-MCPD) in selected food groups, 1999-2000 , 2002, Food additives and contaminants.

[8]  W. Matthews,et al.  3-Monochloropropane-1,2-diol (3-MCPD) in food ingredients from UK food producers and ingredient suppliers , 2002, Food additives and contaminants.

[9]  C. Crews,et al.  The effects of domestic cooking on the levels of 3-monochloropropanediol in foods , 2001, Food additives and contaminants.

[10]  D. W. Bryant,et al.  Carcinogenicity of Monochloro-1,2-Propanediol (α-Chlorohydrin, 3-MCPD) , 1998 .

[11]  N. Haase,et al.  Untersuchungen zur Farbmessung bei stückigen Gütern , 1994 .

[12]  Andreas Funke,et al.  Backwirksamkeit verschiedener DATEM-Typen auf sortenreinen Mehlen , 1994 .

[13]  P. D. Collier,et al.  Determination of chloropropanols in protein hydrolysates , 1992 .

[14]  J. Davídek,et al.  Mutagenicity of glycerol chlorohydrines and of their esters with higher fatty acids present in protein hydrolysates. , 1982, Mutation research.

[15]  J. Davídek,et al.  Chlorohydrins in protein hydrolysates , 1978, Zeitschrift fur Lebensmittel-Untersuchung und -Forschung.

[16]  K. Gibson,et al.  Characterization and antifertility activity in rats of S(+) α-chlorohydrin , 1977 .