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Effects of Catching Method, Rigor Status at Processing, and Pre-salting Methods on the Water Distribution and Characteristics of Heavily Salted Atlantic Cod (Gadus morhua) Muscle: A Multi-parametric Magnetic Resonance Study

  • María Gudjónsdóttir
  • Amidou Traoré
  • Ásbjörn Jónsson
  • Magnea Gudrún Karlsdóttir
  • Sigurjón Arason
Reference work entry

Abstract

The distribution and characteristics of water in the muscle of various commercially available Icelandic heavily salted Atlantic cod products were analyzed with proton magnetic resonance methods. The products varied in choice of catching method, in pre- or post-rigor processing, flattening or filleting cut, and pre-salting technique (brine injection with salt with/without polyphosphates, brining and pickling) and choice of brine-injection instruments.

All products had heterogeneous water distributions, but the level of heterogeneity was dependent on the handling during processing. Brine injection led to salt-induced swelling, which effect remained after the kench dry salting step. Double brine injection induced needle traces in the muscle, even after kench salting. Relaxation time analysis indicated that pickle salted products had the highest degree of protein denaturation in the muscle amongst the analyzed pre-salting methods. The multi-parametric analysis indicated how powerful the MR methods are for process and product characterization and optimization.

Keywords

Heavily salted cod (bacalao) Catching method Salting methods Rigor status MRI NMR Physicochemical properties 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Faculty of Food Science and NutritionUniversity of IcelandReykjavikIceland
  2. 2.INRA UR370Theix, Saint Genes ChampanelleFrance
  3. 3.Matis ohf. Icelandic Food and Biotech R&D, Value Chain, Processing and AquacultureReykjavikIceland

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