Gas-diffusion microextraction coupled with spectrophotometry for the determination of formaldehyde in cork agglomerates

In this work, a simple methodology was developed for the extraction and determination of free formaldehyde content in cork agglomerate samples. For the first time, gas-diffusion microextraction was used for the extraction of volatile formaldehyde directly from samples, with simultaneous derivatizati...

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Published in:Analytical and bioanalytical chemistry 2017-04, Vol.409 (11), p.2885-2892
Main Authors: Brandão, Pedro F., Ramos, Rui M., Valente, Inês M., Almeida, Paulo J., Carro, Antonia M., Lorenzo, Rosa A., Rodrigues, José A.
Format: Article
Language:English
Subjects:
Acetylacetone
Agglomerates
Agglomeration
Analytical Chemistry
Asymmetry
Biochemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Cork
Cork (Materials)
Extraction
Food Science
Formaldehyde
Indoor air quality
Laboratory Medicine
Methodology
Monitoring/Environmental Analysis
Reagents
Research Paper
Spectrophotometry
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cited_by cdi_FETCH-LOGICAL-c514t-3842269de8e209069cc33d22f160c0170912254394103335d058cd3560ffa2703
cites cdi_FETCH-LOGICAL-c514t-3842269de8e209069cc33d22f160c0170912254394103335d058cd3560ffa2703
container_end_page 2892
container_issue 11
container_start_page 2885
container_title Analytical and bioanalytical chemistry
container_volume 409
creator Brandão, Pedro F.
Ramos, Rui M.
Valente, Inês M.
Almeida, Paulo J.
Carro, Antonia M.
Lorenzo, Rosa A.
Rodrigues, José A.
description In this work, a simple methodology was developed for the extraction and determination of free formaldehyde content in cork agglomerate samples. For the first time, gas-diffusion microextraction was used for the extraction of volatile formaldehyde directly from samples, with simultaneous derivatization with acetylacetone (Hantzsch reaction). The absorbance of the coloured solution was read in a spectrophotometer at 412 nm. Different extraction parameters were studied and optimized (extraction temperature, sample mass, volume of acceptor solution, extraction time and concentration of derivatization reagent) by means of an asymmetric screening. The developed methodology proved to be a reliable tool for the determination of formaldehyde in cork agglomerates with the following suitable method features: low LOD (0.14 mg kg -1 ) and LOQ (0.47 mg kg -1 ), r 2  = 0.9994, and intraday and interday precision of 3.5 and 4.9%, respectively. The developed methodology was applied to the determination of formaldehyde in different cork agglomerate samples, and contents between 1.9 and 9.4 mg kg −1 were found. Furthermore, formaldehyde was also determined by the standard method EN 717-3 for comparison purposes; no significant differences between the results of both methods were observed. Graphical abstract Representation of the GDME system and its main components.
doi_str_mv 10.1007/s00216-017-0233-x
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1618-2650
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source Springer Nature
subjects Acetylacetone
Agglomerates
Agglomeration
Analytical Chemistry
Asymmetry
Biochemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Cork
Cork (Materials)
Extraction
Food Science
Formaldehyde
Indoor air quality
Laboratory Medicine
Methodology
Monitoring/Environmental Analysis
Reagents
Research Paper
Spectrophotometry
title Gas-diffusion microextraction coupled with spectrophotometry for the determination of formaldehyde in cork agglomerates
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