This study includes the investigation of chemical properties such as nitrosomyoglobin content, lycopene
content, and the oxidation level, and the sensorial properties of frankfurters which have been produced
by both reducing the nitrite level and adding tomato powder. All samples have been vacuum packed and
stored at þ4 C for 60 days.
The pH of the frankfurters produced with tomato powder was reduced, when compared to the samples
which did not contain tomato powder. This effect was due to the acidic characteristics of tomato. As the
level of nitrite was reduced, the oxidation level of the frankfurters was increased significantly. Addition of
2 g/100 g of tomato powder decreased the level of oxidation; however, 4 g/100 g of tomato powder
caused a slight increase when compared to the samples which did not contain tomato powder. According
to this result it can be stated that tomato powder retards the oxidation reaction. According to sensorial
evaluations, tomato powder improved the consumer acceptability as well. Addition of tomato powder
increased the internal and external colour scores, and frankfurters were found to be more acceptable by
the panellists. Nitrosomyoglobin (NOMb) content of the samples was decreased along with the decreased
level of nitrite, and this, in turn, contributed to the decreased level of redness
This study includes the investigation of chemical properties such as nitrosomyoglobin content, lycopenecontent, and the oxidation level, and the sensorial properties of frankfurters which have been producedby both reducing the nitrite level and adding tomato powder. All samples have been vacuum packed andstored at þ4 C for 60 days.The pH of the frankfurters produced with tomato powder was reduced, when compared to the sampleswhich did not contain tomato powder. This effect was due to the acidic characteristics of tomato. As thelevel of nitrite was reduced, the oxidation level of the frankfurters was increased significantly. Addition of2 g/100 g of tomato powder decreased the level of oxidation; however, 4 g/100 g of tomato powdercaused a slight increase when compared to the samples which did not contain tomato powder. Accordingto this result it can be stated that tomato powder retards the oxidation reaction. According to sensorialevaluations, tomato powder improved the consumer acceptability as well. Addition of tomato powderincreased the internal and external colour scores, and frankfurters were found to be more acceptable bythe panellists. Nitrosomyoglobin (NOMb) content of the samples was decreased along with the decreasedlevel of nitrite, and this, in turn, contributed to the decreased level of redness
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