TY - JOUR
T1 - Iron speciation by microsequential injection solid phase spectrometry using 3-hydroxy-1(H)-2-methyl-4-pyridinone as chromogenic reagent
AU - Suárez, Ruth
AU - Mesquita, Raquel B. R.
AU - Rangel, Maria
AU - Cerdà, Víctor
AU - Rangel, António O. S. S.
PY - 2015/2
Y1 - 2015/2
N2 - The speciation of iron using the newly synthesized 3-hydroxy-1(H)-2-methyl-4-pyridinone by solid phase spectrophotometry in a microsequential injection lab-on-valve (μSI-LOV-SPS) methodology is described. Iron was retained in a reusable column, Nitrilotriacetic Acid Superflow (NTA) resin, and the ligand was used as both chromogenic and eluting reagent. This approach, analyte retention and matrix removal, enabled the assessment of iron (III) and total iron content in fresh waters and high salinity coastal waters with direct sample introduction, in the range of 20.0-100 μg/L. with a LOD of 9 μg/L. The overall effluent production was 2 mL, corresponding to the consumption of 0.48 μg of 2-metil-3-hydroxy-4-pyridinone, 0.34 mg of NaHCO3, 16 mg of HNO3, 4.4 μg H2O2 and 400 μL of sample. Four reference samples were analyzed and a relative deviation<10% was obtained; furthermore, several bathing waters (13) were analyzed using the developed method and the results were comparable to those obtained by atomic absorption spectrophotometry (relative deviations<6%).
AB - The speciation of iron using the newly synthesized 3-hydroxy-1(H)-2-methyl-4-pyridinone by solid phase spectrophotometry in a microsequential injection lab-on-valve (μSI-LOV-SPS) methodology is described. Iron was retained in a reusable column, Nitrilotriacetic Acid Superflow (NTA) resin, and the ligand was used as both chromogenic and eluting reagent. This approach, analyte retention and matrix removal, enabled the assessment of iron (III) and total iron content in fresh waters and high salinity coastal waters with direct sample introduction, in the range of 20.0-100 μg/L. with a LOD of 9 μg/L. The overall effluent production was 2 mL, corresponding to the consumption of 0.48 μg of 2-metil-3-hydroxy-4-pyridinone, 0.34 mg of NaHCO3, 16 mg of HNO3, 4.4 μg H2O2 and 400 μL of sample. Four reference samples were analyzed and a relative deviation<10% was obtained; furthermore, several bathing waters (13) were analyzed using the developed method and the results were comparable to those obtained by atomic absorption spectrophotometry (relative deviations<6%).
KW - 3-Hydroxy-4-pyridinone
KW - Iron(III)
KW - Lab-on-valve
KW - NTA resin
KW - Solid phase spectrometry
KW - Total iron
UR - http://www.scopus.com/inward/record.url?scp=84913527031&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2014.03.059
DO - 10.1016/j.talanta.2014.03.059
M3 - Article
C2 - 25435220
AN - SCOPUS:84913527031
SN - 0039-9140
VL - 133
SP - 15
EP - 20
JO - Talanta
JF - Talanta
ER -