Quantification of Hydrogen Peroxide in Cretan Honey and Correlation with Physicochemical Parameters

Table 2

Variation of color (Pfund grades), moisture content (W), electrical conductivity (EC), diastase activity (DN), hydroxymethylfurfural (HMF), and hydrogen peroxide (mM in 30% v/v aqueous honey solution) among all honeys examined.

	Mean	±SD (n)	Median	Min	Max
Thyme honey (n = 12)
Pfund grades (mm)	61.4	16.0	62.0	33.0	84.0
W (g/100 g)	14.9	0.59	14.6	14.2	16.0
EC (mS/cm)	0.48	0.10	0.50	0.27	0.63
DN	22.6	10.2	24.3	8.5	43.6
HMF (mg/kg)	7.4	3.7	7.0	2.4	13.9
H2O2 (mM)	0.045	0.022	0.034	0.028	0.092
PDO “Pefkothymaromelo Kritis” (blend thyme-pine) honey (n = 12)
Pfund grades (mm)	78.0	6.1	76.0	70.0	90.0
W (g/100 g)	14.4	0.6	14.4	13.4	15.8
EC (mS/cm)	0.77	0.10	0.77	0.65	0.91
DN	10.9	3.9	9.4	7.3	18.0
HMF (mg/Kg)	6.1	3.0	4.8	2.8	11.5
H2O2 (mM)	0.038	0.006	0.038	0.027	0.049
Pine honeydew honey (n = 3)
Pfund grades (mm)	85.3	8.4	81.0	80.0	95.0
W (g/100 g)	14.5	0.7	14.5	13.8	15.2
EC (mS/cm)	1.08	0.10	1.11	0.96	1.16
DN	12.1	9.4	8.2	5.1	22.7
HMF (mg/kg)	2.8	2.1	1.9	1.2	5.2
H2O2 (mM)	0.036	0.012	0.030	0.028	0.050
Orange blossom (Citrus) honey (n = 3)
Pfund grades (mm)	30.7	4.5	31.0	26.0	35.0
W (g/100 g)	15.9	0.6	16.0	15.2	16.5
EC (mS/cm)	0.26	0.12	0.20	0.19	0.46
DN	16.4	5.9	15.0	11.4	22.8
HMF (mg/kg)	19.1	15.6	12.8	7.78	36.9
H2O2 (mM)	0.038	0.024	0.050	0.010	0.054