Certification of total arsenic, dimethylarsinic acid and arsenobetaine contents in a tuna fish powder (BCR-CRM 627) |
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| Authors: | F Lagarde M B Amran M J F Leroy C Demesmay M Ollé A Lamotte H Muntau P Michel P Thomas S Caroli E Larsen P Bonner G Rauret M Foulkes A Howard B Griepink and E A Maier |
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| Institution: | (1) Department of Applied Chemistry, Faculty of Food Science, Szent István University, Villányi út 29–33, 1118 Budapest, Hungary;(2) ENEA C.R. CASACCIA–TEIN/CHIM, Via Anguillarese, 301–00060 Rome, Italy |
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| Abstract: | Tuna fishes were collected in the Straits of Messina (Italy), were dissected and dorsal muscles minced, freeze-dried, ground
and sieved. The obtained powder was stabilised by γ-irradiation and filled into brown glass bottles. The homogeneity and stability
at +20 °C and +40 °C were verified with regards to the total arsenic, dimethylarsinic acid and arsenobetaine contents. Ten
laboratories participated in the certification study. All participants had demonstrated beforehand their ability to produce
accurate results for the As speciation in fish tissue. The certified values are: total arsenic (4.8 ± 0.3) mg/kg, arsenobetaine
(52 ± 3) μmol/kg, dimethylarsinic acid (2.0 ± 0.3) μmol/kg. The material is available from the BCR since early 1998.
Received: 31 March 1998 / Revised: 20 July 1998 / Accepted: 25 July 1998 |
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