TY - JOUR
T1 - Microsequential injection lab-on-valve system for the spectrophotometric bi-parametric determination of iron and copper in natural waters
AU - González, Alba
AU - Mesquita, Raquel B. R.
AU - Avivar, Jessica
AU - Moniz, Tânia
AU - Rangel, Maria
AU - Cerdà, Víctor
AU - Rangel, António O. S. S.
N1 - Funding Information:
R.B.R. Mesquita thanks to Fundação para a Ciência e a Tecnologia (FCT) and POCH of FSE for the grant SFRH/BPD/112032/2015 . This work was also supported by National Funds from FCT through the projects PTDC/AAG-MAA/5887/2014 , UID/Multi/50016/2013 and with financial support from FCT/MEC through national funds and co-financed by FEDER , under the Partnership Agreement PT2020 NORTE-01–0145-FEDER-000024 , ( UID/MULTI/04378/2013 – POCI/01/0145/FERDER/007728 ). The Spanish Agencia Estatal de Investigación (AEI) and the European Funds for Regional Development (FEDER) are gratefully acknowledged for financial support through Project CTQ2016-77155-R ( AEI/FEDER, UE ). A.G. also acknowledges financial support from MINECO for her pre-doctoral fellowship ( DI-15–07998 ).
Funding Information:
R.B.R. Mesquita thanks to Funda??o para a Ci?ncia e a Tecnologia (FCT) and POCH of FSE for the grant SFRH/BPD/112032/2015. This work was also supported by National Funds from FCT through the projects PTDC/AAG-MAA/5887/2014, UID/Multi/50016/2013 and with financial support from FCT/MEC through national funds and co-financed by FEDER, under the Partnership Agreement PT2020 NORTE-01?0145-FEDER-000024, (UID/MULTI/04378/2013 ? POCI/01/0145/FERDER/007728). The Spanish Agencia Estatal de Investigaci?n (AEI) and the European Funds for Regional Development (FEDER) are gratefully acknowledged for financial support through Project CTQ2016-77155-R (AEI/FEDER, UE). A.G. also acknowledges financial support from MINECO for her pre-doctoral fellowship (DI-15?07998).
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/5/15
Y1 - 2017/5/15
N2 - The determination of iron and copper exploiting a microsequential injection lab-on-valve system with online spectrophotometric detection is described. A new, environmental friendly 3-hydroxy-4-pyridinone chelator, functionalized with a polyethylene glycol chain (MRB12) to improve water solubility, was used for iron determination. For copper determination, 1-(2-pyridylazo)-2-naphthol (PAN) was used. Different parameters affecting the formation of the complexes were studied, namely sample volume, reagent concentration, and buffer composition and concentration. The optimized conditions, 150 µL of sample volume and 250 mg L−1 of MRB12 for iron determination, and 200 µL of sample and 120 mg L−1 of PAN for copper determination, enabled an LOD of 15 and 18 µg L−1 for iron and copper, respectively. The robustness of the developed procedure was assessed by the calculation of the relative standard deviation (RSD), 5% for iron determination and 2% for copper determination. The accuracy of the method was assessed comparing the results with two certified samples (RD<7.5%) and calculating recovery percentages with five river water samples (average<107%).
AB - The determination of iron and copper exploiting a microsequential injection lab-on-valve system with online spectrophotometric detection is described. A new, environmental friendly 3-hydroxy-4-pyridinone chelator, functionalized with a polyethylene glycol chain (MRB12) to improve water solubility, was used for iron determination. For copper determination, 1-(2-pyridylazo)-2-naphthol (PAN) was used. Different parameters affecting the formation of the complexes were studied, namely sample volume, reagent concentration, and buffer composition and concentration. The optimized conditions, 150 µL of sample volume and 250 mg L−1 of MRB12 for iron determination, and 200 µL of sample and 120 mg L−1 of PAN for copper determination, enabled an LOD of 15 and 18 µg L−1 for iron and copper, respectively. The robustness of the developed procedure was assessed by the calculation of the relative standard deviation (RSD), 5% for iron determination and 2% for copper determination. The accuracy of the method was assessed comparing the results with two certified samples (RD<7.5%) and calculating recovery percentages with five river water samples (average<107%).
KW - 1-(2-pyridylazo)-2-naphthol
KW - Bi-parametric determination
KW - Iron and copper
KW - PEGylated 3-hydroxy-4-pyridinone
KW - Water analysis
UR - http://www.scopus.com/inward/record.url?scp=85014196718&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2017.02.055
DO - 10.1016/j.talanta.2017.02.055
M3 - Article
C2 - 28340782
AN - SCOPUS:85014196718
SN - 0039-9140
VL - 167
SP - 703
EP - 708
JO - Talanta
JF - Talanta
ER -