Welcome to FIS   Sponsored By
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us
   


Comparative test results for swordfish. (Photo: Stock File/FIS)

Fluorescent polymer detects mercury contamination in fish

Click on the flag for more information about Spain SPAIN
Saturday, February 18, 2017, 01:50 (GMT + 9)

Researchers at the University of Burgos have manufactured a fluorescent polymer, called JG25, capable of detecting the presence of mercury, in both organic and inorganic form, in fish.

According to the researchers, mercury is a toxic metal that can reach the environment from natural sources, but in recent decades its concentrations have soared in marine and land areas by industrial discharges.

In the food chain it is present diluted in organic form, as methylmercury (MeHg +), or inorganic, as the cation Hg2 +.

"The polymer contacts samples extracted directly from fish for about 20 minutes and, after being irradiated with ultraviolet light, emits a bluish light whose intensity is proportional to the amount of methylmercury and inorganic mercury present in the fish," explains lead author, Tomas Torroba.

The technique was applied by a portable polymer probe that can be used in situ, in samples of 2 grams extracted from various species.

The quantitative relationship between mercury levels in fish and the increase in fluorescence was verified with a chemical analysis (called ICP-Mass).

The results, published in Chemical Communications journal, show that larger fish have higher amounts of mercury: Between 1.0 and 2.0 parts per million in swordfish, tuna and school shark; about 0.5 ppm in conger and 0.2 ppm in pangasius, Agencia Sinc reported.

However, this harmful substance was not found in farmed salmon, since although they are fish of great size and in the upper part of the trophic chain, in captivity there is no presence of the metal.

The authors point out that the amount of mercury in fish and what a person eats determines its toxicity.

The European Food Safety Authority (EFSA) recommends that the tolerable weekly intake of methylmercury be no more than one serving containing amounts in excess of 1,6 μg/kg (micrograms per kilogram of fish) and 4 μg/Kg for the case of inorganic mercury, an amount higher than that detected.

For its part, FDA food safety agency goes further and recommends not to consume more than one serving of fish per week containing concentrations greater than 1 μg/kg.

"It is considered that above 0.5 ppm food contamination is already considerable," explains Torroba.

That amount is surpassed and even doubled by several of the analyzed samples of fresh tuna and swordfish. Hence, experts advise pregnant women to reduce the weekly consumption of certain types of fish, such as swordfish, because of the risk it could pose to the fetus.

[email protected]
www.fis.com

 

 

 


 Print


Click to know how to advertise in FIS
MORE NEWS
Russian Federation
Apr 21, 02:50 (GMT + 9):
Russian Fishery to set up pollock processing plant in the Russian Far East
Australia
Apr 21, 02:30 (GMT + 9):
South Australian sardine fishery to enter MSC assessment process
Worldwide
Apr 21, 02:00 (GMT + 9):
IN BRIEF - Small changes in rainforests cause big damage to fish ecosystems
Australia
Apr 21, 02:00 (GMT + 9):
Salmon cannery hopes to attract Australian consumers’ interest
Portugal
Apr 21, 01:50 (GMT + 9):
New tuna factory to start operations in Vila Nova de Cerveira
United Kingdom
Apr 21, 01:30 (GMT + 9):
The British encouraged to consume jellyfish
Canada
Apr 21, 01:00 (GMT + 9):
IN BRIEF - BC oyster farmers taking big hit as three farms still closed due to contamination
United Kingdom
Apr 21, 01:00 (GMT + 9):
IN BRIEF - Salmon packs recalled over health concern
Senegal
Apr 21, 01:00 (GMT + 9):
IN BRIEF - A rise in foreign industrial trawlers off the coast of Senegal is causing local fishermen to lose their livelihoods
United States
Apr 21, 01:00 (GMT + 9):
IN BRIEF - Local Shellfish Beds Restricted Due To Pollution
Worldwide
Apr 21, 01:00 (GMT + 9):
IN BRIEF - Annual 5.0% Growth expected for Global Aquaculture Market by 2021
Peru
Apr 21, 00:00 (GMT + 9):
Virtual platform to favour data sharing on fight against IUU fishing
United States
Apr 20, 23:20 (GMT + 9):
Five Alaska seafood businesses to participate in trade mission to China
European Union
Apr 20, 22:50 (GMT + 9):
International high-tech system project could revolutionise fishing industry
Spain
Apr 20, 22:30 (GMT + 9):
Alantra fund acquires Canarian fish producer and distributor



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Russian Fishery to set up pollock processing plant in the Russian Far East
Russia Fed. The Russian Fishery Company has announced plans to start setting up a fish processing factory at Nadezhdinskaya Priority Development Territory, close to Vladivostok, in the Russian Far East.
Foundation to award USD 950,000 for fisheries innovation projects
United States The National Fish and Wildlife Foundation has made a request for proposals focusing on innovation and supporting effective participation of fishermen and fishing communities in the implementation of sustainable fisheries in the United States.
European Parliament approves EU-Mauritius fisheries agreement
European Union The plenary session of the European Parliament approved the fisheries agreement between the European Union and Mauritius, which will be valid for four years and benefits 85 EU vessels.
EC intends to speed trade deal settlements with with Japan and Singapore
European Union The EC proposes to speed the settlement of the Economic Partnership Agreement with Japan and the trade and investment agreements with Singapore.
 
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods Inc. -Headquarter-
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO -Food and Agriculture Organization- Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
Marine Harvest ASA - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
Morpol ASA - Group Headquarters
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2018 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER