Immunofluorescent detection of soya protein in frankfurters

This work aimed to verify the conformity between the detection of soya protein using the immunofluorescence method and the manufacturer’s declaration of the presence of soya protein in frankfurters purchased from the retail network. Thirty-two samples were tested. These samples were selected with a view to the presence of soya protein declared by the producer on the packaging. The method was validated by comparing positive results produced by the method under investigation with the details given on the packaging of the meat product. Soya protein was detected in 92.8% of samples in which the producer stated the presence of vegetable protein on the packaging and in 94.4% of samples in which the producer stated the presence of soya protein. The results indicate that the immunofluorescence method is suitable for demonstrating the presence of soya protein in meat products.