Table 1
Effect of sample pretreatments (filter ing and centrifugation) for analyzing fusel oils in liquor (unit: mg/L)

Sample	Fusel oils	Before sample pretreatment	After filtering	After centrifugation
Takju	1-Propanol	82.83±4.28	81.51±2.63	81.5±4.06
	Iso-butanol	96.48±1.70	96.36±0.82	97.37±0.98
	1-Butanol	ND1)	ND	ND
	2-Butanol	ND	ND	ND
	Iso-amyl alcohol	198.98±2.48	199.80±0.30	197.47±7.12
	Active amylc alcohol	50.03±0.14	53.17±2.11	51.55±1.95
100 mg/L of fusel oil solution	1-Propanol	105.86±2.50	106.02±1.43	-2)
	Iso-butanol	109.38±0.20	109.62±0.22	-
	1-Butanol	103.76±5.05	106.16±2.12	-
	2-Butanol	104.18±0.74	105.23±2.47	-
	Iso-amyl alcohol	101.95±9.14	102.26±7.90	-
	Active amyl alcohol	103.02±6.17	103.35±3.80	-

ND, under limit of detection.
-, experiment was not conducted.
Analysis was performed in duplicate and no significant differences were found among samples (before and after treatment) from Duncan test.