Bracketins versus multipoint calibration in determination of isocyanates in agglomerated cork stoppers

Inês Delgado, Catarina André, Ana Ramos, Ana Sofia Matos, K. Stockham, S. Kumaran, Isabel Castanheira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

A calibration method was developed for the quantification of isocyanates in cork stoppers agglomerates. Bracketing and multipoint calibration curve was applied to a in-house optimized UPLC/DAD analytical method. The calibration curves were obtained by regression analysis using experimental points that covers the range of concentrations expected in real samples. A contaminated real sample was injected and MDI concentration was 6.2 % and 6.4% when calibration methods to calculate the content were multipoint or bracketing, respectively. According with our results both methods are complementary and necessary to guarantee the reliably of results obtained by chromatographic procedure.

Original languageEnglish
Title of host publication20th IMEKO World Congress 2012
Pages696-699
Number of pages4
Volume1
Publication statusPublished - 2012
Event20th IMEKO World Congress 2012 - Busan, Korea, Republic of
Duration: 9 Sep 201214 Sep 2012

Conference

Conference20th IMEKO World Congress 2012
Country/TerritoryKorea, Republic of
CityBusan
Period9/09/1214/09/12

Keywords

  • 1,2PP
  • Bracketing
  • Calibration Curve
  • MDI
  • UPLC-DAD

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