Table 4. Major volatile congener ranges of Vitis coignetiae brandy
(unit: mg/L)

Vitis coignetiae	Maturation period (month)	Acetaldehyde	Ethyl acetate	Methyl alcohol	Fusel oils
					n-Propanol	Iso-butanol	n-Butanol	Isoamyl alcohol	n-Amyl alcohol
Initial	0	38.16±0.021)	255.58±0.00	272.23±0.00	107.96±0.00	281.01±0.00	ND2)	898.33±0.01	ND
Oak	3	28.52±0.00	237.17±0.01	405.86±0.12	103.61±0.00	287.43±0.01	7.31±0.00*	905.86±0.04	ND
	7	12.79±0.00*3)	101.77±0.00**	142.92±0.10	353.81±0.00****	314.73±0.00	21.06±0.00****	1,007.16±0.00	ND
	11	ND	137.09±0.08**	23.05±0.04**	149.30±0.02****	504.19±0.06****	44.50±0.01****	1,642.08±0.20****	ND
	17	ND	118.68±0.00**	71.12±0.00*	106.96±0.00	687.88±0.01****	19.35±0.00****	1,605.57±0.01****	ND
Stainless	3	26.68±0.00	250.30±0.01	471.53±0.02****	99.18±0.00	276.22±0.01	ND	873.50±0.04	ND
	7	13.59±0.00*	104.63±0.00****	282.97±0.00	290.08±0.01***	269.65±0.00	ND	859.49±0.00	ND
	11	12.73±0.00*	84.72±0.00****	172.59±0.00****	95.72±0.00*	276.74±0.00	ND	876.83±0.00	ND
	17	19.06±0.01	115.39±0.00****	279.09±0.00	93.96±0.00*	272.13±0.00	ND	864.75±0.00	ND
Glass	3	56.94±0.03	318.37±0.01****	441.24±0.01****	94.00±0.00***	259.87±0.01***	ND	822.51±0.02****	ND
	7	39.99±0.00	103.18±0.00****	298.73±0.00	286.63±0.00****	270.34±0.00	ND	860.04±0.00*	ND
	11	47.84±0.00	145.12±0.00****	16.83±0.00****	93.48±0.00***	276.86±0.00	ND	876.49±0.01	ND
	17	39.30±0.01	69.47±0.00****	29.31±0.03****	93.46±0.00***	268.99±0.00*	ND	880.74±0.00	ND

Each value is expressed as mean±SD (n=3).
Not detected.
^*p<0.05, ^**p<0.01, ^***p<0.001, ^****p<0.0001.