TY  - JOUR
AU  - Jókainé Szatura, Zsuzsa
AU  - Abrankó, László
AU  - Fodor, Péter
TI  - SPME-GC-pyrolysis-AFS determination of methylmercury in marine fish products by alkaline sample preparation and aqueous phase phenylation derivatization
JF  - JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
J2  - J AGR FOOD CHEM
VL  - 53
PY  - 2005
IS  - 14
SP  - 5499
EP  - 5505
PG  - 7
SN  - 0021-8561
DO  - 10.1021/jf0501140
UR  - https://m2.mtmt.hu/api/publication/1390070
ID  - 1390070
AB  - Characterization of a cost-efficient analytical method based on alkaline sample digestion with KOH and NaOH, followed by aqueous phase phenylation derivatization with NaBPh4 and solid phase microextraction (SPME) for the determination of methylmercury in typical fish-containing food samples commercially available in Hungary, is reported. The sample preparation procedure along with the applied SPME-GC-pyrolysis-AFS system was validated by measuring certified reference materials (CRM) BCR-464, TORT-2, and a candidate CRM BCR 710. To carry out an estimation of average Hungarian methylmercury exposures via marine fish and/or fish-containing food consumption, 16 commercially available products and 3 pooled representative seafood samples of-according to a previous European survey-the three most consumed fish species in Hungary, herring, sardines, and hake, were analyzed. Methylmercury concentrations of the analyzed samples were in the range 0.016-0.137 mu g of MeHg g(-1) dry weight as Hg.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Grinberg, P.
AU  - Campos, R.C.
AU  - Mester, Zoltán
AU  - Sturgeon, R.E.
TI  - A comparison of alkyl derivatization methods for speciation of mercury based on solid phase microextraction gas chromatography with furnace atomization plasma emission spectrometry detection
JF  - JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
J2  - J ANAL ATOM SPECTROM
VL  - 18
PY  - 2003
IS  - 8
SP  - 902
EP  - 909
PG  - 8
SN  - 0267-9477
DO  - 10.1039/b212545e
UR  - https://m2.mtmt.hu/api/publication/30393739
ID  - 30393739
N1  - Institute for National Measurements Standards, National Research Council of Canada, Ottawa, Ont. K1A 0R6, Canada            
            Department of Chemistry, Pontificia Universidade Católica do Rio de Janeiro, Rua Marques de Sao Vicente, 225, 22453-900 Rio de Janeiro-RJ, Brazil            
            Cited By :50            
            Export Date: 15 January 2019            
            Correspondence Address: Sturgeon, R.E.; Institute for National Measurements Standards, National Research Council of Canada, Ottawa, Ont. K1A 0R6, Canada; email: ralph.sturgeon@nrc.ca
AB  - Several derivatizing agents were evaluated for use in speciating mercury in biological samples using solid phase microextraction in conjunction with tandem gas chromatography-furnace atomization plasma emission spectrometry (SPME-GC-FAPES). Following digestion with methanolic potassium hydroxide, the pH of the samples was adjusted and NaCl added when necessary. The mercury species were then derivatized with sodium tetraphenylborate or sodium tetrapropylbqrate and extracted by SPME using a 100 um PDMS coated fiber. The derivatized species were then separated by GC and detected by FAPES. All experimental parameters were optimized for best separation and analytical response. Propylation proved to be more sensitive, robust and faster than ethylation or phenylation, leading to procedural detection limits of 0.55 ng g-1 for methylmercury, 0.34 ng g-1 for ethylmercury and 0.23 ng g-1 for inorganic mercury. An intra-day and intra-fiber precision of typically 2.2% was achieved whereas long-term (4 months) and inter-fiber reproducibility precision was typically 4.4%. The accuracy of the method was validated by the analysis of Certified Reference Materials (DORM-2, DOLT-2 and TORT-2) from the National Research Council of Canada. © The Royal Society of Chemistry 2003.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Grinberg, P.
AU  - Campos, R.C.
AU  - Mester, Zoltán
AU  - Sturgeon, R.E.
TI  - Solid phase microextraction capillary gas chromatography combined with furnace atomization plasma emission spectrometry for speciation of mercury in fish tissues
JF  - SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
J2  - SPECTROCHIM ACTA B
VL  - 58
PY  - 2003
IS  - 3
SP  - 427
EP  - 441
PG  - 15
SN  - 0584-8547
DO  - 10.1016/S0584-8547(02)00272-0
UR  - https://m2.mtmt.hu/api/publication/30393749
ID  - 30393749
AB  - The use of solid phase microextraction in conjunction with tandem gas chromatography-furnace atomization plasma emission spectrometry (SPME-GC-FAPES) was evaluated for the determination of methylmercury and inorganic mercury in fish tissue. Samples were digested with methanolic potassium hydroxide, derivatized with sodium tetraethylborate and extracted by SPME. After the SPME extraction, species were separated by GC and detected by FAPES. All experimental parameters were optimized for best separation and analytical response. A repeatability precision of typically 2% can be achieved with long-term (3 months) reproducibility precision of 4.3%. Certified Reference Materials DORM-2, DOLT-2 and TORT-2 from the National Research Council of Canada were analyzed to verify the accuracy of this technique. Detection limits of 1.5 ng g-1 for methylmercury and 0.7 ng g-1 for inorganic mercury in biological tissues were obtained. © 2002 Elsevier Science B.V. All rights reserved.
LA  - English
DB  - MTMT
ER  -