Development of a Handheld System for Liquor Authenticity Detection Based on Laser Spectroscopy Technique

Table 1

The similarity between liquor samples (%). The corresponding laser intensity of each sample is also marked in parentheses, and “—” means that different spirits can be not matched with each other due to the noncorrelation of laser intensity.

Num. (intensity)	Num. (intensity)
	Similarity
	^#0 (10)	^#1 (6)	^#2 (6)	^#3 (4)	^#4 (10)	^#5 (10)	^#6 (10)	^#7 (10)	^#8 (10)	^#9 (10)	^#10 (10)	^#11 (10)	^#12 (10)
^#0 (10)	99.98	—	—	—	50.81	40.86	32.08	60.65	56.44	63.48	85.48	83.02	83.35
^#1 (6)	—	99.95	94.32	—	—	—	—	—	—	—	—	—	—
^#2 (6)	—	94.32	99.97	—	—	—	—	—	—	—	—	—	—
^#3 (4)	—	—	—	99.98	—	—	—	—	—	—	—	—	—
^#4 (10)	50.81	—	—	—	99.99	92.47	68.29	79.41	85.67	87.03	56.52	80.92	77.88
^#5 (10)	40.86	—	—	—	92.47	99.96	75.01	78.69	91.66	85.33	52.18	75.51	71.30
^#6 (10)	32.08	—	—	—	68.29	75.01	99.98	62.93	69.99	67.44	50.96	57.96	56.97
^#7 (10)	60.65	—	—	—	79.41	78.69	62.93	99.51	78.13	94.40	63.11	76.10	73.81
^#8 (10)	56.44	—	—	—	85.67	91.66	69.99	78.13	99.90	82.73	71.87	86.48	82.57
^#9 (10)	63.48	—	—	—	87.03	85.33	67.44	94.40	82.73	99.62	65.88	81.31	78.80
^#10 (10)	85.48	—	—	—	56.62	52.18	50.96	63.11	71.87	65.88	99.96	90.45	90.34
^#11 (10)	83.02	—	—	—	80.92	75.51	57.96	76.10	86.48	81.31	90.45	99.55	93.15
^#12 (10)	83.35	—	—	—	77.88	71.30	56.97	73.81	82.57	78.80	90.34	93.15	99.30