Liha töötlemine
in a single analytical step. mated procedures for food samples are cur-
rently available (Marmiroli et al. 2008),
although the automation is restricted nowa-
DNA Extraction from Food Matrices
days to a limited number of food samples
The first step of PCR-based methods in (Hahnen et al. 2002). Several papers compare
food analysis relies on a careful DNA- different extraction methods (Zimmermann
extraction procedure, since components of et al. 1998a; Peano et al. 2004).
food samples and nucleic acid extraction After DNA extraction, quantity and
reagents can reduce or even block the PCR quality must be evaluated by means of UV
amplification, and DNA may be degraded. spectrophotometry at 260 nm; by fluorimetry
annaabi.ee 
