Evaluation of cloud point extraction coupled with fluorescence spectroscopy and multivariate curve resolution-alternating least squares for tributyltin determination in sediment samples

Francis Alarcón, Roxana Bustamante, Waldo Quiroz, Luis F. Aguilar, Manuel A. Bravo

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this work, a new procedure for tributyltin (TBT) detection in marine sediments based on cloud point extraction (CPE) followed by total fluorescence spectroscopy combined with multivariate curve resolution-alternating least squares (MCR-ALS) is proposed. The multivariate model satisfactorily achieved the second order advantage in the presence of uncalibrated interferences, such as butyltin compounds or metallic species that are commonly found in sediment sample extracts. Under optimal conditions, the detection limit reached 3.0μg Sn L-1, and the relative prediction error was lower than 10%. The accuracy of the method was validated with the analysis of a certified sediment sample (marine sediment PACS-2), and there was good agreement between the certified and experimental results. Finally, the proposed methodology was satisfactorily applied to spiked real sediment samples, demonstrating the suitability of the proposed method for TBT detection in contaminated sediment samples.

Original languageEnglish
Pages (from-to)132-138
Number of pages7
JournalMicrochemical Journal
Volume124
DOIs
StatePublished - 1 Jan 2016
Externally publishedYes

Keywords

  • Cloud point extraction
  • Multivariate calibration
  • Organotin
  • Sediment samples

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