Table 2.

Validation parameters of the UHPLC-DAD method for the quantification of monocarbonyls in glucose-containing PDFs after derivatization with DNPH (mean values ± standard deviation of six measurements).

	Added concentration (µM)	Measured concentration ± standard deviation (µM)	Coefficient of variation (%)	Recovery rate (%)
Furfural	1.2	1.3 ± 0.04	3.1	105.7
	4.8	4.6 ± 0.2	4.2	96.3
	9.6	9.2 ± 0.2	1.8	95.9
5-HMF	2.1	2.2 ± 0.07	3.3	102.6
	40.0	39.6 ± 0.1	0.4	99.0
	149.9	148.0 ± 1.9	1.3	98.7
Formaldehyde	1.3	1.2 ± 0.08	6.3	91.6
	10.1	9.7 ± 0.1	1.2	96.0
	18.7	18.2 ± 0.3	1.3	97.5
Acetaldehyde	1.8	1.7 ± 0.09	5.2	93.7
	44.9	43.6 ± 0.5	1.2	97.1
	179.8	175.2 ± 4.6	2.6	97.4