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The sampling efficiency of C 18 solid-phase extraction cartridges was investigated for methylamine, ethylamine, propylamine, butylamine and pentylamine, in air. Determination of these analytes was based on derivatization with o-phthaldialdehyde-N-acetylcysteine (OPA-NAC) on the solid support and fluorescence detection at λ excitation ...
A flow method for the determination of formaldehyde in air is presented. A cylindrical wet effluent diffusion denuder (CWEDD) is used for continuous collection of formaldehyde from air into distilled-deionized water as denuder liquid. Collected formaldehyde in the denuder concentrate is on-line determined by fluorescence 2,4-pentandione method. The collection efficiency of HCHO is quantitative at...
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