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1. Determination of loratadine and pseudoephedrine sulfate in pharmaceuticals based on non-linear second-order spectrophotometric data generated by a pH-gradient flow injection technique and artificial neural networks

Author:
Culzoni, María J.,   et al.   ; Goicoechea, Héctor C.;     Show all 2 Author
Source:
Analytical and bioanalytical chemistry 2007 v.389 no.7-8 pp. 2217-2225
ISSN:
1618-2642
Subject:
algorithms; drugs; flow injection analysis; high performance liquid chromatography; neural networks; pseudoephedrine; sulfates
Abstract:
... Loratadine (LOR) and pseudoephedrine sulfate (PES) were determined in pharmaceutical samples by using non-linear second-order data generated by a pH-gradient flow injection analysis (FIA) system with diode-array detection. Determination of both analytes was performed on the basis of differences between the acid-base and spectral features of each drug species. Non-linearities were detected by using ...
DOI:
10.1007/s00216-007-1656-6

2. Chemometric resolution of fully overlapped CE peaks: Quantitation of carbamazepine in human serum in the presence of several interferences

Author:
Culzoni, María J.,   et al.   ; Vera-Candioti, Luciana; Olivieri, Alejandro C.; Goicoechea, Héctor C.;     Show all 4 Authors
Source:
Electrophoresis 2008 v.29 no.22 pp. 4527-4537
ISSN:
0173-0835
Subject:
acetaminophen; algorithms; blood serum; caffeine; chemometrics; electrophoresis; humans; ibuprofen; least squares; metabolites; monitoring; phenobarbital; phenylephrine; phenytoin; salicylic acid; theophylline
Abstract:
... Drug monitoring in serum samples was performed using second-order data generated by CE-DAD, processed with a suitable chemometric strategy. Carbamazepine could be accurately quantitated in the presence of its main metabolite (carbamazepine epoxide), other therapeutic drugs (lamotrigine, phenobarbital, phenytoin, phenylephrine, ibuprofen, acetaminophen, theophylline, caffeine, acetyl salicylic acid ...
DOI:
10.1002/elps.200800400

3. Fast chromatographic method for the determination of dyes in beverages by using high performance liquid chromatography—Diode array detection data and second order algorithms

Author:
Culzoni, María J.,   et al.   ; Schenone, Agustina V.; Llamas, Natalia E.; Garrido, Mariano; Di Nezio, Maria S.; Fernández Band, Beatriz S.; Goicoechea, Héctor C.;     Show all 7 Authors
Source:
Journal of chromatography 2009 v.1216 no.42 pp. 7063-7070
ISSN:
0021-9673
Subject:
soft drinks; food coloring; high performance liquid chromatography; rapid methods; algorithms; amaranth dye
Abstract:
... A fast chromatographic methodology is presented for the analysis of three synthetic dyes in non-alcoholic beverages: amaranth (E123), sunset yellow FCF (E110) and tartrazine (E102). Seven soft drinks (purchased from a local supermarket) were homogenized, filtered and injected into the chromatographic system. Second order data were obtained by a rapid LC separation and DAD detection. A comparative ...
DOI:
10.1016/j.chroma.2009.08.077
PubMed:
19748097