Comparative evaluation of ICP sample introduction systems to be used in the metabolite profiling of chlorine-containing pharmaceuticals via HPLC-ICP-MS

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Title: Comparative evaluation of ICP sample introduction systems to be used in the metabolite profiling of chlorine-containing pharmaceuticals via HPLC-ICP-MS
Authors: Klencsár, Balázs | Sánchez, Carlos | Balcaen, Lieve | Todolí Torró, José Luis | Lynen, Frederic | Vanhaecke, Frank
Research Group/s: Análisis de Polímeros y Nanomateriales
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Keywords: HPLC coupled to ICP-tandem mass spectrometry | Metabolite profiling | Speciation | Chromatographic method validation | GMP
Knowledge Area: Química Analítica
Issue Date: 10-May-2018
Publisher: Elsevier
Citation: Journal of Pharmaceutical and Biomedical Analysis. 2018, 153: 135-144. doi:10.1016/j.jpba.2018.02.031
Abstract: A systematic evaluation of four different ICP sample introduction systems to be used in the context of metabolite profiling of chlorine-containing pharmaceuticals via HPLC-ICP-MS was carried out using diclofenac and its major metabolite, 4′-hydroxy-diclofenac, as model compounds. The strict requirements for GMP validation of chromatographic methods in the pharmaceutical industry were adhered to in this context. The final aim of this investigation is an extension of the applicability and validatability of HPLC-ICP-MS in the field of pharmaceutical R&D. Five different gradient programmes were tested while the baseline peak width (wb), peak capacity (P), USP tailing factor (As) and USP signal-to-noise ratio (USP S/N) were determined as major indicators of the chromatographic performance and the values obtained were compared to the corresponding FDA recommendations (if applicable). Four different ICP-MS sample introductions systems were investigated involving two units typically working at higher flow rates (∼1.0 mL min−1) and another two systems working at lower flow rates (∼0.1 mL min−1). Optimal conditions with potential for applicability under GMP conditions were found at a mobile phase flow rate of 1.0 mL min−1 by using a pneumatic micro-flow LC nebulizer mounted onto a Peltier-cooled cyclonic spray chamber cooled to −1 °C for sample introduction. Under these conditions, HPLC-ICP-MS provided a chromatographic performance similar to that of HPLC with UV detection. The peak shape (USP tailing factor = 1.1–1.4) was significantly improved compared to that obtained with the Peltier-cooled Scott-type spray chamber. Two alternative sample introduction systems − a POINT® and a High-Temperature Torch-Integrated Sample Introduction System (hTISIS) − were also tested at a flow rate of 0.1 mL min−1 using a chromatographic column with 1.0 mm ID. Although these systems allowed the peak shape to be improved compared to that obtained with the traditional Scott-type spray chamber, the limits of detection and of quantification achievable were strongly compromised due to the significantly lower sensitivity observed for Cl. In addition to a comparison of the aforementioned sample introduction systems, also the effect of spray chamber temperature was evaluated and it was demonstrated that proper temperature control plays an essential role in the optimization of HPLC-ICP-MS methods.
Sponsor: Balázs Klencsár acknowledges the Special Research Fund of Ghent University (BOF-UGent) for providing a PhD grant. Carlos Sánchez thanks the Ministry of Education, Culture and Sports, Spain for financial support under the form of the contract FPU 13/01438 and the mobility grantEST16/00433.
ISSN: 0731-7085 (Print) | 1873-264X (Online)
DOI: 10.1016/j.jpba.2018.02.031
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier B.V.
Peer Review: si
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Appears in Collections:INV - NANOBIOPOL - Artículos de Revistas

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