Near-infrared spectroscopy for the detection and quantification of bacterial contaminations in pharmaceutical products

Cristina Quintelas, Daniela P. Mesquita, João A. Lopes, Eugénio C. Ferreira, Clara Sousa*

*Autor correspondente para este trabalho

Resultado de pesquisarevisão de pares

19 Citações (Scopus)

Resumo

Accurate detection and quantification of microbiological contaminations remains an issue mainly due the lack of rapid and precise analytical techniques. Standard methods are expensive and time-consuming being associated to high economic losses and public health threats. In the context of pharmaceutical industry, the development of fast analytical techniques able to overcome these limitations is crucial and spectroscopic techniques might constitute a reliable alternative. In this work we proved the ability of Fourier transform near infrared spectroscopy (FT-NIRS) to detect and quantify bacteria (Bacillus subtilis, Escherichia coli, Pseudomonas fluorescens, Salmonella enterica, Staphylococcus epidermidis) from 10 to 108 CFUs/mL in sterile saline solutions (NaCl 0.9%). Partial least squares discriminant analysis (PLSDA) models showed that FT-NIRS was able to discriminate between sterile and contaminated solutions for all bacteria as well as to identify the contaminant bacteria. Partial least squares (PLS) models allowed bacterial quantification with limits of detection ranging from 5.1 to 9 CFU/mL for E. coli and B. subtilis, respectively. This methodology was successfully validated in three pharmaceutical preparations (contact lens solution, cough syrup and topic anti-inflammatory solution) proving that this technique possess a high potential to be routinely used for the detection and quantification of bacterial contaminations.
Idioma originalEnglish
Páginas (de-até)199-206
Número de páginas8
RevistaInternational Journal of Pharmaceutics
Volume492
Número de emissão1-2
DOIs
Estado da publicaçãoPublicado - 27 jul. 2015
Publicado externamenteSim

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