Speciation of methylmercury in market seafood by thermal degradation, amalgamation and atomic absorption spectroscopy

Assessment of metal levels in foodstuffs from the Region of Valencia (Spain)

“…In Madrid (Spain), average values of 0.990 mg kg −1 for luvar and 0.930 mg kg −1 for sworthfish were obtained [ 39 ]. In Andalucia (Spain) an average value of 0.540 mg kg −1 for swordfish and 0.470 mg kg −1 for tuna [ 40 ] were found and in Valencia (Spain) values of 0.7666 mg kg −1 for swordfish and 0.666 mg kg −1 for tuna were reported [ 41 ]. And finally, in a study carried out in Canarias, tHg average levels in fish of 0.1189 mg kg -1 [ 16 ] were obtained.…”

Analytical strategies of sample preparation for the determination of mercury in food matrices — A review

“…Various chromatographic techniques have been employed for the quantification of mercury species, including the gas chromatography (GC) and high-performance liquid chromatography (HPLC) [130]. The hyphenation with spectrometric detection techniques, such as atomic fluorescence spectrometry (AFS), atomic emission spectrometry (AES), atomic absorption spectrometry (AAS) and mass spectrometry (MS) have resulted in powerful tools for speciation of organic mercury species in various samples such as red wine [131], fish [132,133,134], rice [135] and seafood [136]. Capillary electrophoresis has also been used in some applications.…”

“…A procedure involving sample thermal decomposition followed by mercury amalgamation and atomic absorption has been performed for determination of methylmercury in fish. An extraction step with toluene and back-extraction into an aqueous L-cysteine solution allows the separation for speciation analysis [119]. An on-line pre concentrated nitric acid and 3 mL of hydrogen peroxide.…”

“…Capillary electrophoresis has also been used in some applications. The determination of methylmercury in fish was performed by leaching with HBr analyte extraction with toluene and back-extraction with aqueous L-cysteine [119]. MeHg was determined using sample thermal decomposition followed by mercury amalgamation and atomic absorption.…”

1,3,4-Thiadiazol derivative functionalized-Fe3O4@SiO2 nanocomposites as a fluorescent probe for detection of Hg2+ in water samples

“…3 The limit of mercury(II) concentration in drinking water has been determined by the EPA to be 2 ppb. 4 In order to ascertain the exact amount of mercury ions in drinking water, there are various analytical methods including atomic absorption spectroscopy, 5 inductively coupled plasmamass spectrometry, 6 high performance liquid chromatography, 7 and electrochemical sensing. 8 However, these techniques suffer from complex and unhandy equipment which limits their on-site applications.…”