Determination of formaldehyde by flow injection analysis with spectrophotometric detection exploiting brilliant green–sulphite reaction
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Lúcio Bolognesi
Abstract
A method for the determination of formaldehyde by flow injection analysis with spectrophotometric detection is proposed, based on retarding the reaction between brilliant green and sulphite by the addition of formaldehyde; this was investigated for formaldehyde quantification in extracts from wood-based panels. For the first time, a heating step was explored, providing a sample throughput of 50 analyses per hour, with a limit of detection of 0.02 mg L−1 and linearity of 0.20-3.0 mg L−1, which was adequate for the expected range of formaldehyde concentration in the extracts. The mean recovery observed for actual samples was in the range of 92-106 %, with a maximum relative standard deviation of 6.0 %. The paired t-test revealed no significant difference between this method and the official Nash method, demonstrating an appropriate accuracy and precision; the method is proposed as a simple, fast and inexpensive alternative for the routine determination of formaldehyde in an aqueous medium.
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Laser microsampling and multivariate methods in provenance studies of obsidian artefacts
- Ultra-trace arsenic and mercury speciation and determination in blood samples by ionic liquid-based dispersive liquid–liquid microextraction combined with flow injection-hydride generation/cold vapor atomic absorption spectroscopy
- Determination of formaldehyde by flow injection analysis with spectrophotometric detection exploiting brilliant green–sulphite reaction
- Passive sampling application to control air quality in interior of new vehicles
- Low-temperature enzymatic hydrolysis resolution in mini-emulsion media
- Performance and characterisation of CeO2–TiO2–WO3 catalysts for selective catalytic reduction of NO with NH3
- Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3
- Morphology, structure, and photoactivity of two types of graphene oxide–TiO2 composites
- A novel efficient magnetic core–zeolitic shell nanocatalyst system: preparation, characterization and activity
- Characterisation and coagulation performance of polysilicate–ferric–zinc
- Antioxidant activity of rosemary extracts in solution and embedded in polymeric systems
- Comparison of selected aroma compounds in cultivars of sea buckthorn (Hippophae rhamnoides L.)
- Thio-click approach to the synthesis of stable glycomimetics
- Synthesis of ether-linked [60]fullerene glycoconjugates by nucleophilic cyclopropanation
