TY - JOUR
T1 - GFAAS determination of zinc in fish feed and feces using slurry sampling
AU - Saleh, Mayra Anton Dib
AU - Neves, Renato de Cássio Ferreira
AU - Silva, Fábio Arlindo
AU - Moraes, Paula Martin de
AU - Loureiro, Vanessa Rosa
AU - Roldan, Paulo dos Santos
AU - Padilha, Pedro de Magalhães
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge the financial support of FAPESP—Fundação de Amparo à Pesquisa do Estado de São Paulo (Process 03/13362-6).
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2009/6
Y1 - 2009/6
N2 - This paper presents a simple, fast, and sensitive method to determine zinc in samples of feces and fish feed by electrothermal atomic absorption spectrometry through the direct introduction of slurries of the samples into the spectrometer's graphite tube. The procedure is based on the injection of 10 μL of an acidified aqueous solution containing 0.50% w/v of feces or feed and 0.50% v/v HNO 3 into graphite tube. The limits of detection and quantification calculated for 20 readings of the blank of the standard slurries (0.50% w/v of feces or feed devoid of zinc) were 0.04 and 0.13 μg L -1 for the standard feces slurries and 0.05 and 0.17 μg L -1 for the standard feed slurries. The proposed method was applied in studies of digestibility of zinc in different fish feeds, and their results proved compatible with that obtained from samples mineralized by acid digestion using microwave oven.
AB - This paper presents a simple, fast, and sensitive method to determine zinc in samples of feces and fish feed by electrothermal atomic absorption spectrometry through the direct introduction of slurries of the samples into the spectrometer's graphite tube. The procedure is based on the injection of 10 μL of an acidified aqueous solution containing 0.50% w/v of feces or feed and 0.50% v/v HNO 3 into graphite tube. The limits of detection and quantification calculated for 20 readings of the blank of the standard slurries (0.50% w/v of feces or feed devoid of zinc) were 0.04 and 0.13 μg L -1 for the standard feces slurries and 0.05 and 0.17 μg L -1 for the standard feed slurries. The proposed method was applied in studies of digestibility of zinc in different fish feeds, and their results proved compatible with that obtained from samples mineralized by acid digestion using microwave oven.
KW - AAS
KW - Biological samples
KW - Fish nutrition
KW - Process analysis
KW - Sampling
UR - http://www.scopus.com/inward/record.url?scp=62349091175&partnerID=8YFLogxK
U2 - 10.1007/s12161-008-9053-0
DO - 10.1007/s12161-008-9053-0
M3 - Article
AN - SCOPUS:62349091175
SN - 1936-9751
VL - 2
SP - 162
EP - 168
JO - Food Analytical Methods
JF - Food Analytical Methods
IS - 2
ER -
