Ascorbic acid content in apple pulp, peel, and monovarietal cloudy juices of 64 different cultivars

Figures & data

Table 1. HPLC-DAD method instrumental validation parameters.

Standard linearity
	Range (mg/L)	0.05–200
	r^2	>0.999
Instrument precision (n = 6)^a	Intraday
	Mean (mg/L) ± SD	10.0 ± 0.1
	RSD (%)	1.1
Instrument precision (n = 6)^a	Inter-day
	Mean (mg/L) ± SD	9.9 ± 0.4
	RSD (%)	4.0
Instrumental detection limits	ILOD (mg/L)	0.016
	ILOQ (mg/L)	0.049
Stability over 24h^a	98 ± 1%

(SD = standard deviation, RSD = relative standard deviation, ILOD = Instrumental limit of detection, ILOQ = Instrumental limit of quantification).

^aValues refer to 10 mg/L AsA in extraction solution (7:3 v/v of 8% v/v acetic acid, 3% w/v metaphosphoric acid/methanol)

Figure 1. Ascorbic acid (AsA) content of peel and pulp of 64 apple cultivars. Data are ordered according to AsA pulp content. Error bars indicate standard deviations (n=5; biological replicates).

Figure 2. Ascorbic acid (AsA) concentration of 64 monovarietal cloudy apples juices. Error bars indicate standard deviations (n=3; technical replicates).