The optimum condition for malonic dialdehyde liberation from smoked fish and curing smoke condensates
✍ Scribed by Witas, T. ;Sledziewski, P.
- Book ID
- 102217413
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 303 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0027-769X
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✦ Synopsis
The aim of this study was to establish the conditions for malonic dialdehyde liberation from smoked fish and curing smoke condensates, as well as to determine its content in smoked fish.
The specific absoprtion peaks of coloured solutions of malonic dialdehyde, from curing smoke condensates, with 2-thiobarbituric acid were determined. The conditions for malonic dialdehyde liberation were established, i.e. time and degree of alkaline hydrolysis of condensate, degree of distillation of acidified condensate solution, the conditions of coloured solution development, determination of extinction and method of calculation of malonic dialdehyde content in smoked fish, in individual layers of smoked mackerel fillets. The mechanism of formation of polycyclic aromatic hydrocarbone and hydrogen peroxide or hydroxyl free radicals. formed during pyrolysis of organic compounds in the pmsene of liberated malonic dialdehyde, was proposed.
Curing smoke is generated due to the pyrolysis of wood at temperatures 400--700 ' C and contains different amounts of aromatic hydrocarbons, depending on smoking process, temperature and air flow rate [8]. Depending on these factors, from oxidized fatty acids and chain hydrocarbons as well as during their pyrolysis considerable quantities of malonic dialdehyde are liberated, which exhibit condensation, aggregation and copolymerisation properties as well as a pathogenic character [3,4, 5, 8, 11 -151.
In this study the conditions for malonic dialdehyde liberation from curing smoke and from smoked fish and the content of malonic dialdehyde were determined. Furthermore, the possibility of explaining the mechanism of polycyclic aromatic hydrocarbons formation during thermal decomposition of organic compounds was proposed.