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Titolo:
A comparison of techniques for preparing fish fillet for ICP-AES multielemental analysis and the microwave digestion of whole fish
Autore:
Moeller, A; Ambrose, RF; Hee, SSQ;
Indirizzi:
Univ Calif Los Angeles, Sch Publ Hlth, Dept Environm Hlth Sci, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Univ Calif Los Angeles, Sch Publ Hlth, UCLA Ctr Occupat & Environm Hlth, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA
Titolo Testata:
FOOD ADDITIVES AND CONTAMINANTS
fascicolo: 1, volume: 18, anno: 2001,
pagine: 19 - 29
SICI:
0265-203X(200101)18:1<19:ACOTFP>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLASMA-ATOMIC EMISSION; TRACE-ELEMENTS; BIOLOGICAL SAMPLES; SPECTROMETRY; CADMIUM; LEAD; CHROMIUM; SYSTEMS; COPPER; ZINC;
Keywords:
fish elements; multielemental analysis; ICP analysis; fish digestion; microwave digestion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Hee, SSQ Univ Calif Los Angeles, Sch Publ Hlth, Dept Environm Hlth Sci, 10833 Le Conte Ave, Los Angeles, CA 90095 USA Univ Calif Los Angeles 10833 LeConte Ave Los Angeles CA USA 90095
Citazione:
A. Moeller et al., "A comparison of techniques for preparing fish fillet for ICP-AES multielemental analysis and the microwave digestion of whole fish", FOOD ADDIT, 18(1), 2001, pp. 19-29

Abstract

Four catfish fillet homogenate treatments before multielemental metal analysis by simultaneous inductively coupled plasma/atomic emission spectroscopy were compared in triplicate. These treatments were: nitric acid wet-ashing by Parr bomb digestion; nitric acid wet-ashing by microwave digestion; tetramethylammonium hydroxide/nitric acid wet digestion; and dry-ashing. The tetramethylammonium hydroxide/nitric acid method was imprecise (coefficients of variation >20%). The dry-ashing method was fast and sensitive but had low recoveries of 50% for spiked Pb and Al and was not as precise as the Parr bomb or microwave treatments. The Parr bomb method was the most precise method but was less sensitive than the microwave method which had nearly the same precision. The microwave method was then adapted to homogenates of small whole fish less than or equal to3 cm in length. The whole fish homogenate required more vigorous digestion conditions, and addition of more acid after the evaporative step because of the presence of less oxidizable and acid-soluble components than fillet. The whole fish homogenate was also moreheterogeneous than catfish fillet. A quality assurance protocol to demonstrate homogenate uniformity is essential. The use of a non-specialized microwave oven system allowed precise results for fillet and whole fish homogenates.

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Documento generato il 29/03/20 alle ore 09:36:42