abstract
In this work two objectives were proposed: (i) to optimize a new salmon saltingesmoking method using
vacuum packaging and (ii) to evaluate the application of impedance spectroscopy (IS) to the on-line
monitoring of the process. Different processing conditions were evaluated (4 smoke flavoring (SF) salt
concentrations, 3 salting times, salting in vacuum or in air). Physico-chemical analyses and IS
measurements were performed with three different sensors during the process. Salting with 16 g SF salt/
100 g fish in vacuum packaging provided smoked salmon similar to products currently available on the
market. This new method has the advantages of reducing processing times and waste. IS measurements
were carried out by three different electrodes. The most appropriate sensor for process monitoring was
a needle electrode, with which robust prediction models for NaCl content, moisture and aw during the
saltingesmoking process were obtained. The results showed the potential of IS as a rapid on-line
monitoring method of the salmon saltingesmoking process.