Alternative Analysis of Formaldehyde-DNPH and Other Carbonyl-DNPH Derivatives by Capillary GC

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Courtesy of Sigma-Aldrich Co., LLC

Alternative Analysis of Formaldehyde-DNPH and Other Carbonyl-DNPH Derivatives by Capillary GC -  GC analysis of 15 carbonyl-DNPH compounds has some advantages over the HPLC analyses described in US EPA and other environmental methods.  Determination of formaldehyde and 14 other carbonyls in air
according to US Environmental Protection Agency Method TO11  and American Society for Testing and Materials Method D5197 calls for trapping the analytes on silica gel coated with 2,4-dinitrophenylhydrazine (DNPH), followed by HPLC/UV analysis. A recently developed capillary GC method provides an alternative
to the accepted HPLC methodology.  The GC method provides good resolution and reduces analysis time by almost 50%.

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