TY - JOUR
T1 - Sequential injection system with in-line solid phase extraction and soil mini-column for determination of zinc and copper in soil leachates
AU - Paluch, Justyna
AU - Mesquita, Raquel B. R.
AU - Cerdà, Víctor
AU - Kozak, Joanna
AU - Wieczorek, Marcin
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 supported by National Funds from FCT through project PTDC/AAG-MAA/5887/2014 ; scientific collaboration from FCT project UID/Multi/50016/2013 is also acknowledged. The authors also acknowledge financial support from Spanish Ministry of Economy and Competitiveness (MINECO) through Project CTQ-2016-77155-R co-financed by The Spanish Agencia Estatal de Investigación (AEI) and FEDER funds.
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 supported by National Funds from FCT through project PTDC/AAG-MAA/5887/2014; scientific collaboration from FCT project UID/Multi/50016/2013 is also acknowledged. The authors also acknowledge financial support from Spanish Ministry of Economy and Competitiveness (MINECO) through Project CTQ-2016-77155-R co-financed by The Spanish Agencia Estatal de Investigación (AEI) and FEDER funds.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - A sequential injection (SI) system equipped with in-line solid phase extraction column and in-line soil mini-column is proposed for determination of zinc and copper in soil leachates. The spectrophotometric determination (560 nm) is based on the reaction of both analytes with 1-(2-Pyridylazo)-2-naphthol (PAN). Zinc is determined after retaining copper on a cationic resin (Chelex100) whereas copper is determined from the difference of the absorbance measured for both analytes, introduced into the system with the use of a different channel, and zinc absorbance. The influence of several potential interferences was studied. Using the developed method, zinc and copper were determined within the concentration ranges of 0.005–0.300 and 0.011–0.200 mg L−1, and with a relative standard deviation lower than 6.0% and 5.1%, respectively. The detection limits are 1.4 and 3.0 µg/L for determination of zinc and copper, respectively. The developed SI method was verified by the determination of both analytes in synthetic and certified reference materials of water samples, and applied to the determination of the analytes in rain water and soil leachates from laboratory scale soil core column and in-line soil mini-column.
AB - A sequential injection (SI) system equipped with in-line solid phase extraction column and in-line soil mini-column is proposed for determination of zinc and copper in soil leachates. The spectrophotometric determination (560 nm) is based on the reaction of both analytes with 1-(2-Pyridylazo)-2-naphthol (PAN). Zinc is determined after retaining copper on a cationic resin (Chelex100) whereas copper is determined from the difference of the absorbance measured for both analytes, introduced into the system with the use of a different channel, and zinc absorbance. The influence of several potential interferences was studied. Using the developed method, zinc and copper were determined within the concentration ranges of 0.005–0.300 and 0.011–0.200 mg L−1, and with a relative standard deviation lower than 6.0% and 5.1%, respectively. The detection limits are 1.4 and 3.0 µg/L for determination of zinc and copper, respectively. The developed SI method was verified by the determination of both analytes in synthetic and certified reference materials of water samples, and applied to the determination of the analytes in rain water and soil leachates from laboratory scale soil core column and in-line soil mini-column.
KW - Copper
KW - Mini soil column
KW - Sequential injection analysis
KW - Soil leachates
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=85044942672&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2018.03.091
DO - 10.1016/j.talanta.2018.03.091
M3 - Article
C2 - 29759206
AN - SCOPUS:85044942672
SN - 0039-9140
VL - 185
SP - 316
EP - 323
JO - Talanta
JF - Talanta
ER -