TY - JOUR
T1 - Organophosphorus halloysite nanotubes as adsorbent for lead preconcentration in wine and grape juice
AU - Santana, Allan M.
AU - Freire, Tiago M.
AU - da Silva, Francisco L.F.
AU - Menezes, Fernando L.
AU - Ramos, Lauren L.
AU - Cavalcante, Giovanna R.
AU - Fechine, Lillian M.U.D.
AU - Vieira, Laís H.S.
AU - Ferreira, Odair P.
AU - Freire, Rafael M.
AU - Denardin, Juliano C.
AU - Lopes, Gisele S.
AU - Matos, Wladiana O.
AU - Fechine, Pierre B.A.
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1
Y1 - 2021/1
N2 - Preconcentration of Pb(II) in grape-based beverages using organophosphate-functionalized halloysite nanotubes was investigated by flame atomic absorption spectroscopy (FAAS). For this proposal, a central composition design (CCD) was performed for an optimum experimental condition on Pb(II) preconcentration procedure, pH 7.5, preconcentration time of 7.5 min and adsorbent mass of 40 mg. The detection and quantification limit values were calculated as 12 and 40 μg kg−1, respectively. Additionally, considering Pb(II) tolerable recovery, the nanotubes could be reuse for six cycles. The preconcentration method was applied to wine and grape juice samples and concentrations below LOD were found for all samples. The proposed methodology presented great accuracy and limits compatible with current legislation, since spike/recovery tests were performed, and quantitative recoveries were obtained.
AB - Preconcentration of Pb(II) in grape-based beverages using organophosphate-functionalized halloysite nanotubes was investigated by flame atomic absorption spectroscopy (FAAS). For this proposal, a central composition design (CCD) was performed for an optimum experimental condition on Pb(II) preconcentration procedure, pH 7.5, preconcentration time of 7.5 min and adsorbent mass of 40 mg. The detection and quantification limit values were calculated as 12 and 40 μg kg−1, respectively. Additionally, considering Pb(II) tolerable recovery, the nanotubes could be reuse for six cycles. The preconcentration method was applied to wine and grape juice samples and concentrations below LOD were found for all samples. The proposed methodology presented great accuracy and limits compatible with current legislation, since spike/recovery tests were performed, and quantitative recoveries were obtained.
KW - Grape juice
KW - Halloysite nanotube
KW - Organophosphate
KW - Pb(II) preconcentration
KW - Wine
UR - https://www.scopus.com/pages/publications/85095564950
U2 - 10.1016/j.clay.2020.105912
DO - 10.1016/j.clay.2020.105912
M3 - Article
AN - SCOPUS:85095564950
SN - 0169-1317
VL - 200
JO - Applied Clay Science
JF - Applied Clay Science
M1 - 105912
ER -