uantify food allergens (Kerbach et al., 2009). Recently, mass spectrometry-
based methods have been developed and may offer alternative
methods in the future (Heick, Fischer, & Pöpping, 2011). In
addition, DNA-based methods are used mainly as screening tools
to detect the presence of allergenic foods/components. The realtime
PCR-based methods result in quantitative data, the ct-values,
which depend on the initial copy number of the respective target
sequence. Although the relationship between copy number and
content of allergenic protein is not fixed, correlations between
the ct-values and the contents/amounts of allergenic foods or their
components can be established