Preconcentrations and determinations of copper, nickel and lead in baby food samples employing Coprinus silvaticus immobilized multi-walled carbon nanotube as solid phase sorbent.
Food Chem
; 276: 174-179, 2019 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-30409581
ABSTRACT
Preconcentrations of Cu(II), Ni(II) and Pb(II) ions by using Coprinus silvaticus immobilized multiwalled carbon nanotube (MWCNT) were investigated. Effects of important parameters on preconcentration procedure were examined. The best pH values of for Cu(II), Ni(II) and Pb(II) were found to be 6.0, 6.0 and 4.0, respectively. Flow rate of sample solution was 2.0â¯mLâ¯min-1, while desorption was achieved at 1.0â¯mLâ¯min-1 flow rate. Preconcentration factors were achieved as 60 for Cu(II), Ni(II) and 70 for Pb(II) (by dividing initial sample volume to final volume). LODs were calculated as 0.014, 0.016 and 0.093â¯ngâ¯mL-1, respectively for Cu(II), Ni(II) and Pb(II). Accuracy of the method was checked by applying to certified reference samples. Inductively coupled plasma optical emission spectrometer (ICP OES) was employed for measurements of Cu(II), Ni(II) and Pb(II) in digested baby food samples.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cobre
/
Coprinus
/
Nanotubos de Carbono
/
Alimentos Infantis
/
Chumbo
/
Níquel
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article