Development of new analytical method for preconcentration/speciation of inorganic antimony in bottled mineral water using FIA-HG AAS system and SiO2/Al2O3/SnO2 ternary oxide.
Food Chem
; 294: 405-413, 2019 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-31126481
In the present paper, a new analytical preconcentration/speciation method for antimony species determination in bottled mineral water samples using the SiO2/Al2O3/SnO2 adsorbent was developed. The method is based on selective adsorption of Sb(III) ions by SiO2/Al2O3/SnO2 under a wide pH range (2.5-7.5). Total antimony was determined with previous sample treatment using 0.1% (w/v) l-cysteine and the concentration of Sb(V) species was determined by the difference between total and Sb(III). The proposed method provided an analytical curve ranging from 0.50 to 5.00⯵gâ¯L-1 (râ¯=â¯0.999), limit of detection (LD) of 0.17⯵gâ¯L-1 and preconcentration factor (PF) of 136-fold. The method exhibited tolerance to different metal ions and the accuracy was attested from addition and recovery tests (95.2-106.0%) in bottled mineral water samples using 2.0% (w/v) l-cysteine, as well as by analysis of certified material. Only Sb(III) species were determined in mineral water (0.54-1.04⯵gâ¯L-1).
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrofotometria Atômica
/
Água Potável
/
Águas Minerais
/
Antimônio
Idioma:
En
Revista:
Food Chem
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido