Novel Method of Analysis for the Determination of Residual Formaldehyde by High-Performance Liquid Chromatography

Figure 5

Diluent (dashed line), reagent blank (dotted line), and formaldehyde standard (solid line) chromatograms showing the retention time of 4-methylbenzenesulfonohydrazide (MBSH) and the formaldehyde/MBSH derivative peak.