title: Carbon Monoxide Residues in Vacuum-Packed Yellowfin Tuna Loins (Thunnus Albacares).
abstract: The use of carbon monoxide (CO) in fresh fish has generated considerable debate. Carbon monoxide is used to treat fresh fish in order to retain itsfreshred appearance for a longer period. It reacts with the oxy-myoglobin to form a fairly stable cherry red carboxy-myoglobin complex that may mask spoilage, because the CO-complex can be stable beyond the microbiological shelf life of the meat. The presence of CO in tuna fish (Thunnus Albacares) has been investigated by means of optical spectroscopy. Formation of the CO adduct can be easily detected by the combined analysis of electronic absorption spectra in their normal and second derivative modes, monitoring the intense Soret band at 420 nm. Samples were judged as CO treated when their levels were higher than 200 ng/g. Only two positive samples out of 29 analyzed were detected. The high level of uncertainty (0.30) of the method requires the use of more specific and sensitive methods for confirmatory analysis.
authors: Department of Veterinary Medicine and Animal Production, University of Naples Federico II , Rome, Italy.
authors: Raffaele
authors: R
authors: Marrone
authors: Department of Veterinary Medicine and Animal Production, University of Naples Federico II , Rome, Italy.
authors: Celestina
authors: C
authors: Mascolo
authors: National Association of Processing Fish Industries , Rome, Italy.
authors: Giuseppe
authors: G
authors: Palma
authors: Department of Veterinary Medicine and Animal Production, University of Naples Federico II , Rome, Italy.
authors: Giorgio
authors: G
authors: Smaldone
authors: Department of Veterinary Medicine and Animal Production, University of Naples Federico II , Rome, Italy.
authors: Mariagrazia
authors: M
authors: Girasole
authors: Department of Veterinary Medicine and Animal Production, University of Naples Federico II , Rome, Italy.
authors: Aniello
authors: A
authors: Anastasio
keywords: Carbon monoxide; Shelf life; Spectrophotometric method; Thunnus Albacares; Tuna fish