scholarly journals Isotope dilution SPME GC/MS for the determination of methylmercury in tuna fish samples

2006 ◽  
Vol 41 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Giuseppe Centineo ◽  
Elisa Blanco González ◽  
J. Ignacio García Alonso ◽  
Alfredo Sanz-Medel
Keyword(s):  
Isotope Dilution ◽  
Tuna Fish ◽  
Fish Samples

Ultrasensitive flow-injection electrochemical method for determination of histamine in tuna fish samples

2010 ◽  
Vol 43 (4) ◽  
pp. 1116-1122 ◽  
Author(s):  
Behrouz Akbari-adergani ◽  
Parviz Norouzi ◽  
Mohammad Reza Ganjali ◽  
Rassoul Dinarvand
Keyword(s):  
Flow Injection ◽  
Electrochemical Method ◽  
Tuna Fish ◽  
Fish Samples

Stable isotope dilution assay for the accurate determination of tricaine in fish samples by HPLC–MS–MS

2019 ◽  
Vol 33 (5) ◽  
pp. e4512 ◽  
Author(s):  
Chaonan Xie ◽  
Qin Li ◽  
Gang Han ◽  
Huan Liu ◽  
Jien Yang ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Dilution ◽  
Accurate Determination ◽  
Stable Isotope Dilution Assay ◽  
Stable Isotope Dilution ◽  
Isotope Dilution Assay ◽  
Dilution Assay ◽  
Fish Samples

Validation and comparison of analytical methods for the determination of histamine in tuna fish samples

2004 ◽  
Vol 1032 (1-2) ◽  
pp. 79-85 ◽  
Author(s):  
A.L. Cinquina ◽  
F. Longo ◽  
A. Calı̀ ◽  
L. De Santis ◽  
R. Baccelliere ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Tuna Fish ◽  
Fish Samples ◽  
Comparison Of Analytical Methods

scholarly journals Identification of nitrite treated tuna fish meat via the determination of nitrous oxide by head space-gas chromatography/mass spectrometry

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 711
Author(s):  
Markus Niederer ◽  
Sandra Lang ◽  
Bernard Roux ◽  
Thomas Stebler ◽  
Christopher Hohl
Keyword(s):  
Nitric Oxide ◽  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Nitrous Oxide ◽  
Gas Chromatography Mass Spectrometry ◽  
Tuna Fish ◽  
Fish Meat ◽  
Chromatography Mass Spectrometry ◽  
Fish Samples

Tuna fish meat is an expensive and highly perishable sea food. Fresh meat has a bright red colour which soon turns into an unsightly brown during storage. To prolong the aspect of freshness, the red colour is stabilised or even enhanced e.g. with carbon monoxide or nitric oxide, the product of a nitrite / ascorbic acid treatment, which bind as a ligand to myoglobin. These procedures are illegal. Here we present a method for identifying tuna meat samples, which have undergone fraudulent wet salting with nitrite. The method uses headspace-gas chromatography/mass spectrometry (GC/MS) for the determination of nitrous oxide, which is formed as the final product of the two-step reduction nitrite (added agent) to nitric oxide (ligand) to nitrous oxide (target compound). Complex bound nitric oxide is set free with sulfuric acid, which also promotes the reduction to nitrous oxide. The method was validated using 15N labelled nitrite as well as treated and untreated reference fish samples. A survey of 13 samples taken from the Swiss market in 2019 showed that 45 % of all samples were illegally treated with nitrite.

scholarly journals A Portable Setup for the Voltammetric Determination of Total Mercury in Fish with Solid and Nanostructured Gold Electrodes

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1910 ◽  
Author(s):  
Andrea Ruo Redda ◽  
Ornella Abollino ◽  
Mery Malandrino ◽  
Stefania Squadrone ◽  
Maria Cesarina Abete ◽  
...  
Keyword(s):  
Total Mercury ◽  
Microwave Digestion ◽  
Gold Electrodes ◽  
Mercury Determination ◽  
Tuna Fish ◽  
Fresh Fish ◽  
Freeze Dried ◽  
Fish Samples ◽  
Mercury In Fish

A simple procedure for field fish sample pretreatment was developed. This treatment in combination with square wave anodic stripping voltammetry (SW-ASV) with solid gold electrodes (SGE) and gold nanoparticle-modified glassy carbon electrodes (AuNPs-GCE) was applied for the determination of total mercury content. A certified reference material (CRM, Tuna Fish BCR 463), ten freeze-dried samples of canned tuna and two fresh fish samples were analysed both with a bench-top voltammetric analyser after microwave digestion and with a portable potentiostat after mild eating using a small commercial food warmer. The results obtained by the two SW-ASV approaches and by a Direct Mercury Analyser (DMA), the official method for mercury determination, were in very good agreement. In particular, (i) the results obtained with in field procedure are consistent with those obtained with the conventional microwave digestion; (ii) the presence of gold nanoparticles on the active electrode surface permits an improvement of the analytical performance in comparison to the SGE: the Limit of Quantification (LOQ) for mercury in fish-matrix was 0.1 μg L−1 (Hg cell concentration), corresponding to 0.06 mg kg−1 wet fish, which is a performance comparable to that of DMA. The pretreatment proposed in this study is very easy and applicable to fresh fish; in combination with a portable potentiostat, it proved to be an interesting procedure for on-site mercury determination.

scholarly journals Identification of nitrite treated tuna fish meat via the determination of nitrous oxide by head space-gas chromatography/mass spectrometry

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 711
Author(s):  
Markus Niederer ◽  
Sandra Lang ◽  
Bernard Roux ◽  
Thomas Stebler ◽  
Christopher Hohl
Keyword(s):  
Nitric Oxide ◽  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Nitrous Oxide ◽  
Gas Chromatography Mass Spectrometry ◽  
Tuna Fish ◽  
Fish Meat ◽  
Chromatography Mass Spectrometry ◽  
Fish Samples

Tuna fish meat is an expensive and highly perishable sea food. Fresh meat has a bright red colour which soon turns into an unsightly brown during storage. To prolong the aspect of freshness, the red colour is stabilised or even enhanced e.g. with carbon monoxide or nitric oxide, the product of a nitrite / ascorbic acid treatment, which bind as a ligand to myoglobin. These procedures are illegal. Here we present a method for identifying tuna meat samples, which have undergone fraudulent wet salting with nitrite. The method uses headspace-gas chromatography/mass spectrometry (GC/MS) for the determination of nitrous oxide, which is formed as the final product of the two-step reduction nitrite (added agent) to nitric oxide (ligand) to nitrous oxide (target compound). Complex bound nitric oxide is set free with sulfuric acid, which also promotes the reduction to nitrous oxide. The method was validated using 15N labelled nitrite as well as treated and untreated reference fish samples. A survey of 13 samples taken from the Swiss market in 2019 showed that 45 % of all samples were illegally treated with nitrite.

Determination of selected heavy metals in tuna fish (Thunnus thynnus)

2013 ◽  
Vol 38 (03) ◽  
Author(s):  
S Mol ◽  
S Karakulak ◽  
S Ulusoy
Keyword(s):  
Heavy Metals ◽  
Thunnus Thynnus ◽  
Tuna Fish
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