Feasibility study for the preparation of a tuna fish candidate reference material for total As determination

• Published in: Accreditation and quality assurance Vol. 16; no. 8-9; pp. 453 - 458
• Main Authors: Carioni, V. M. O., Chelegão, R., Naozuka, J., Nomura, C. S.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.08.2011; Springer; Springer Nature B.V
• Subjects: Absorption spectroscopy; Accuracy; Analytical Chemistry; Aquatic ecosystems; Arsenic; Atomic absorption analysis; Atomic properties; Biochemistry; Chemistry; Chemistry and Materials Science; Commercial Law; Ecotoxicology; Exact sciences and technology; Feasibility studies; Fish; Food Science; Graphite; Homogeneity; Marine; Marketing; Parameters; Particle size; Practitioner's Report; Reference materials; Sampling; Scientific imaging; Seafood; Slurries; Spectrometric and optical methods; Spectrometry; Thunnus; Tuna; Brazil; Canada; Belgium; United States > US; Germany; Tuna fish; Reference material; Arsenic; Atomic absorption spectrometry; Particle size; Segregation; Check; Accuracy; Pisces; Cryogenics; Production; Pretreatment; Sampling; Freeze; Trace analysis; Graphite furnace; Sample; Feasibility studies; Particle suspension; Certified reference material; Contamination; Hydridation; Vertebrata; Preparation; Thermoelectric atomization; Parameter
• ISSN: 0949-1775; 1432-0517
• DOI: 10.1007/s00769-011-0796-8

This work describes the evaluation of several parameters for the preparation of a tuna fish candidate as a reference material (RM) in order to measure the total As mass fraction by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS) and slurry sampling hydride generation atomic absorption spectrometry (SLS-HG AAS). The main parameters investigated were the homogeneity, analyte segregation and composition during material production. For candidate RM preparation, tuna fish was collected at a local market, cleaned, freeze-dried and treated using different procedures as follows: (1) ground in a cutting mill and separated in different particle sizes (2) ground in cryogenic mill. The mass fraction of As in the cryogenically ground sample was (4.77 ± 0.19) μg g −1 for SLS-GF AAS and (4.61 ± 0.34) μg g −1 for SLS-HG AAS. The accuracy of the procedures was checked with tuna fish certified reference material (BCR 627) with recoveries of 102 and 94% for SLS-GF AAS and SLS-HG AAS, respectively. The homogeneity factor was calculated for different pretreatment procedures and for particle sizes in the range of 500–150 μg, indicating good homogeneity, except for raw fish. There was no observed analyte segregation and no losses, no contamination and no changes in the microdistribution of material during preparation.