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Direct Solid Sampling of Biological Species for the Rapid Determination of Selenium by High-resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry by Beatriz Gómez-Nieto; Ma Jesús Gismera; Ma Teresa Sevilla; Jesús R Procopio is a Chemistry article available to read on EtoBox.

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A direct solid sampling method based on high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS) for the determination of selenium (Se) in biological tissues was optimized. The main analytical line of Se at 196.0267 nm was used to carry out all HR-CS AAS measurements. Different chemical modifiers were evaluated to prevent the loss of Se during the application of the GFAAS temperature program and avoid the interferences due to the presence of phosphorus compounds in sample matrix. The best results were achieved using ruthenium coated platforms and a palladium nanoparticle suspension (Pd NP) as co-injected modifier. Calibration was performed using aqueous standard solutions of Se(IV). For solid sampling, the optimal range of sample mass was between 0.2 and 0.8 mg. The limit of detection (LOD) was 0.06 ng (0.075 μg g−1 using a sample mass of 0.8 mg). The developed solid sampling HR-CS GFAAS method was used for Se determination in two certified reference materials of dogfish tissues and lyophilized and powdered real samples of fish tissues and chicken liver. The precision obtained in these analyses, expressed as relative standard deviation (RSD), w

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Author

Beatriz Gómez-Nieto; Ma Jesús Gismera; Ma Teresa Sevilla; Jesús R Procopio

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Chemistry (Physical Sciences)