6533b7d8fe1ef96bd126a1fc

RESEARCH PRODUCT

Determination of mercury in dry-fish samples by microwave digestion and flow injection analysis system cold vapor atomic absorption spectrometry

María Jesús LagardaReyes BarberáL.aduna De PazRosaura FarréAmparo Alegría

subject

Detection limitFlow injection analysisChemistryMicrowave ovenAnalytical chemistrychemistry.chemical_elementGeneral MedicineAnalytical Chemistrylaw.inventionMercury (element)lawReagentCold vapour atomic fluorescence spectroscopyMicrowave digestionAtomic absorption spectroscopyFood Science

description

Abstract Flow injection analysis system cold vapor atomic absorption spectrometry (FIAS-CV-AAS) preceded by a wet digestion in a microwave oven, as a method for measuring mercury in fish was studied. The digestion process and conditions of the FIAS (carrier concentration: HCl 3% v v ; reducing agent: SnCl2 2% w v : filling and injection times: 8 and 25 min, respectively; and sample volumes) were optimized. The analytical parameters of the proposed method (detection limit = 7.7 ng/g; precision intraassay = 6.7%; interassay = 14.0%) demonstrates its adequacy and are similar to the ones (detection limit = 19.4 ng/g; precision intraassay = 11.2%; interassay = 15.9%) obtained using a conventional wet digestion method with HNO3 + H2SO4 + V2O5. The accuracy are verified with reference material DORM-1 (dog fish-muscle) NAC-CNRC. Moreover, with the optimized method the risk of losses and contamination is low and it is less time consuming and requires smaller reagent volumes than conventional method.

yearjournalcountryeditionlanguage
1997-01-01Food Chemistry
https://doi.org/10.1016/s0308-8146(96)00197-5