PMID- 23601884
OWN - NLM
STAT- MEDLINE
DCOM- 20131022
LR  - 20131121
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 108
DP  - 2013 Apr 15
TI  - Multivariate optimization of an analytical method for the analysis of dog and cat 
      foods by ICP OES.
PG  - 157-64
LID - S0039-9140(13)00151-3 [pii]
LID - 10.1016/j.talanta.2013.03.002 [doi]
AB  - Experimental design methodology was used to optimize an analytical method for 
      determination of the mineral element composition (Al, Ca, Cd, Cr, Cu, Ba, Fe, K, 
      Mg, Mn, P, S, Sr and Zn) of dog and cat foods. Two-level full factorial design 
      was applied to define the optimal proportions of the reagents used for 
      microwave-assisted sample digestion (2.0 mol L(-1) HNO3 and 6% m/v H2O2). A 
      three-level factorial design for two variables was used to optimize the 
      operational conditions of the inductively coupled plasma optical emission 
      spectrometer, employed for analysis of the extracts. A radiofrequency power of 
      1.2 kW and a nebulizer argon flow of 1.0 L min(-1) were selected. The limits of 
      quantification (LOQ) were between 0.03 mug g(-1) (Cr, 267.716 nm) and 87 mug g(-1) 
      (Ca, 373.690 nm). The trueness of the optimized method was evaluated by analysis 
      of five certified reference materials (CRMs): wheat flour (NIST 1567a), bovine 
      liver (NIST 1577), peach leaves (NIST 1547), oyster tissue (NIST 1566b), and fish 
      protein (DORM-3). The recovery values obtained for the CRMs were between 80 +/- 4% 
      (Cr) and 117 +/- 5% (Cd), with relative standard deviations (RSDs) better than 5%, 
      demonstrating that the proposed method offered good trueness and precision. Ten 
      samples of pet food (five each of cat and dog food) were acquired at supermarkets 
      in Aracaju city (Sergipe State, Brazil). Concentrations in the dog food ranged 
      between 7.1 mg kg(-1) (Ba) and 2.7 g kg(-1) (Ca), while for cat food the values 
      were between 3.7 mg kg(-1) (Ba) and 3.0 g kg(-1) (Ca). The concentrations of Ca, 
      K, Mg, P, Cu, Fe, Mn, and Zn in the food were compared with the guidelines of the 
      United States' Association of American Feed Control Officials (AAFCO) and the 
      Brazilian Ministry of Agriculture, Livestock, and Food Supply (Ministerio da 
      Agricultura, Pecuaria e Abastecimento-MAPA).
CI  - Copyright (c) 2013 Elsevier B.V. All rights reserved.
FAU - da Costa, Silvanio Silverio Lopes
AU  - da Costa SS
AD  - Laboratorio de Quimica Analitica Ambiental (LQA), Departamento de Quimica, Centro 
      de Ciencias Exatas e Tecnologia, Universidade Federal de Sergipe (UFS), 49100-000 
      Sao Cristovao (SE), Brazil.
FAU - Pereira, Ana Cristina Lima
AU  - Pereira AC
FAU - Passos, Elisangela Andrade
AU  - Passos EA
FAU - Alves, Jose do Patrocinio Hora
AU  - Alves Jdo P
FAU - Garcia, Carlos Alexandre Borges
AU  - Garcia CA
FAU - Araujo, Rennan Geovanny Oliveira
AU  - Araujo RG
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130307
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Metals)
RN  - 27YLU75U4W (Phosphorus)
RN  - 70FD1KFU70 (Sulfur)
SB  - IM
MH  - Animals
MH  - Cats
MH  - Diet/*veterinary
MH  - Dogs
MH  - Food Analysis/*methods/standards
MH  - Metals/analysis/standards
MH  - Pets
MH  - Phosphorus/analysis/standards
MH  - Reference Standards
MH  - Sulfur/analysis/standards
EDAT- 2013/04/23 06:00
MHDA- 2013/10/23 06:00
CRDT- 2013/04/23 06:00
PHST- 2012/11/27 00:00 [received]
PHST- 2013/02/28 00:00 [revised]
PHST- 2013/03/01 00:00 [accepted]
PHST- 2013/04/23 06:00 [entrez]
PHST- 2013/04/23 06:00 [pubmed]
PHST- 2013/10/23 06:00 [medline]
AID - S0039-9140(13)00151-3 [pii]
AID - 10.1016/j.talanta.2013.03.002 [doi]
PST - ppublish
SO  - Talanta. 2013 Apr 15;108:157-64. doi: 10.1016/j.talanta.2013.03.002. Epub 2013 
      Mar 7.