Table 6. Qualitative and quantification of phenolic acid using HPLC in 100% ethanol extracts from apple flowers with the different drying conditions (320 nm)

Drying conditions	Sample flower name	Caffeic acid2)	p-Coumaric acid	Ferulic acid	Sinapic acid	Salicylic acid	SUM
Hot air drying (HD)	‘Hongno’1)	4.73)	1.3	3.4	4.2	31.8	45.4
	‘Aori’	3.5	21.8	4.6	3.4	20.9	54.2
	‘Fuji’	-	1.7	2.8	3.5	8.3	16.3
	‘Jonathan’	-	-	1.7	4.9	-	6.6
	‘Myanmar’	-	1.4	2.7	4.0	-	8.1
Freeze drying (FD)	‘Hongno’	5.6	3.3	1.3	1.5	123.1	134.8
	‘Aori’	82.0	5.6	1.1	1.3	151.9	241.9
	‘Fuji’	1.4	2.5	-	-	167.4	171.3
	‘Jonathan’	3.7	5.5	-	-	129.8	139
	‘Myanmar’	1.6	3.1	-	-	136.0	140.7

Each sample concentration was 2 mg/mL.
Each sample standard was 0.2-200 mg/kg.
Units was mg/kg.