Parameters	Oxalic	Citric	Malic	Succinic	Formic	Acetic	Ascorbic	pH	Total acidity
Sum organic acids	0.814^a,b	0.881^b	0.673^b	0.288	0.866^b	0.816^b	0.536	−0.680^b	0.672^b
Oxalic		0.660^b	0.323	−0.122	0.930^b	0.506^b	0.670^b	−0.519^b	0.485
Citric			−0.144	−0.340	0.171	0.907^b	−0.226	−0.660^b	0.648^b
Malic				0.397	0.514	0.129	0.030	−0.126	0.242
Succinic					0.370	0.365	−0.024	−0.262	0.178
Formic						0.380	0.006	−0.595^b	0.539^b
Acetic							−0.078	−0.501	0.515
Ascorbic								−0.494	0.570^b
pH									−0.913^b