Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)

An alternative procedure for the flow injection spectrophotometric determination of Cr(VI) with 1,5-diphenylcarbazide (DPC), involving on-line dissolution of the reagent, is presented. Solid DPC (25% m/m in silica) is packed in a PTFE column, which is then incorporated in a single-line flow system s...

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Autores principales: Andrade, F.J., Tudino, M.B., Troccoli, O.E.
Formato: JOUR
Materias:
Chromium(vi) determination
Flow injection
On-line dissolution
chromium
diphenylcarbazide
politef
article
dispersion
dissolution
flow
refraction index
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00032654_v121_n5_p613_Andrade
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00032654_v121_n5_p613_Andrade
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spelling todo:paper_00032654_v121_n5_p613_Andrade2023-10-03T13:55:38Z Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi) Andrade, F.J. Tudino, M.B. Troccoli, O.E. Chromium(vi) determination Flow injection On-line dissolution chromium diphenylcarbazide politef article dispersion dissolution flow refraction index An alternative procedure for the flow injection spectrophotometric determination of Cr(VI) with 1,5-diphenylcarbazide (DPC), involving on-line dissolution of the reagent, is presented. Solid DPC (25% m/m in silica) is packed in a PTFE column, which is then incorporated in a single-line flow system so that reagent dissolution is effected as the sample passes through the column. This procedure reduces the chemical contribution to the dispersion value to a minimum and gives a low detection limit owing to the absence of refractive index peaks. An improvement of the figures of merit compared with those reported previously is shown. The calibration graph is linear up to 0.800 mg l-1 Cr(VI), with a slope of 0.49 l mg-1; the detection limit is 0.005 mg l-1. The relative standard deviation is better than 1%. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00032654_v121_n5_p613_Andrade
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Chromium(vi) determination
Flow injection
On-line dissolution
chromium
diphenylcarbazide
politef
article
dispersion
dissolution
flow
refraction index
spellingShingle Chromium(vi) determination
Flow injection
On-line dissolution
chromium
diphenylcarbazide
politef
article
dispersion
dissolution
flow
refraction index
Andrade, F.J.
Tudino, M.B.
Troccoli, O.E.
Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
topic_facet Chromium(vi) determination
Flow injection
On-line dissolution
chromium
diphenylcarbazide
politef
article
dispersion
dissolution
flow
refraction index
description An alternative procedure for the flow injection spectrophotometric determination of Cr(VI) with 1,5-diphenylcarbazide (DPC), involving on-line dissolution of the reagent, is presented. Solid DPC (25% m/m in silica) is packed in a PTFE column, which is then incorporated in a single-line flow system so that reagent dissolution is effected as the sample passes through the column. This procedure reduces the chemical contribution to the dispersion value to a minimum and gives a low detection limit owing to the absence of refractive index peaks. An improvement of the figures of merit compared with those reported previously is shown. The calibration graph is linear up to 0.800 mg l-1 Cr(VI), with a slope of 0.49 l mg-1; the detection limit is 0.005 mg l-1. The relative standard deviation is better than 1%.
format JOUR
author Andrade, F.J.
Tudino, M.B.
Troccoli, O.E.
author_facet Andrade, F.J.
Tudino, M.B.
Troccoli, O.E.
author_sort Andrade, F.J.
title Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
title_short Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
title_full Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
title_fullStr Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
title_full_unstemmed Flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
title_sort flow dissolution of 1,5-diphenylcarbazide for the determination of chromium(vi)
url http://hdl.handle.net/20.500.12110/paper_00032654_v121_n5_p613_Andrade
work_keys_str_mv AT andradefj flowdissolutionof15diphenylcarbazideforthedeterminationofchromiumvi
AT tudinomb flowdissolutionof15diphenylcarbazideforthedeterminationofchromiumvi
AT troccolioe flowdissolutionof15diphenylcarbazideforthedeterminationofchromiumvi
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