Assessment of Physicochemical Properties of Tequila Brands: Authentication and Quality

Table 1

Mean value and standard deviations for measurements of pH, conductivity, viscosity, density, sound velocity, and refractive index of 53 commercial tequila brands.

(a)

Number	Category	pH	Conductivity (μS/cm)	Viscosity mPa·s
1	Aged	3.72 ± 0.01	48.90 ± 0.50
2	Aged	3.44 ± 0.05	162.87 ± 0.47
3	Aged	4.11 ± 0.01	41.60 ± 0.26
4	Aged	3.82 ± 0.03	29.28 ± 0.34
5	Aged	3.98 ± 0.01	25.68 ± 0.15
6	Aged	4.22 ± 0.11	34.10 ± 0.26
7	Silver	4.05 ± 0.01	18.42 ± 0.31
8	Gold	4.87 ± 0.07	41.60 ± 0.00
9	Aged	3.99 ± 0.05	30.30 ± 0.26
10	Aged	4.07 ± 0.05	39.80 ± 0.00
11	Silver	3.62 ± 0.03	103.47 ± 0.38
12	Silver	3.95 ± 0.02	50.03 ± 0.57
13	Aged	4.14 ± 0.32	35.17 ± 0.35
14	Silver	4.76 ± 0.05	13.09 ± 0.10
15	Gold	3.90 ± 0.26	44.50 ± 1.57
16	Gold	3.97 ± 0.21	55.80 ± 0.20
17	Gold	5.25 ± 0.10	222.03 ± 1.30
18	Aged	4.23 ± 0.26	19.43 ± 0.18
19	Aged	4.05 ± 0.06	28.18 ± 0.11
20	Silver	4.06 ± 0.04	25.55 ± 0.16
21	Aged	4.72 ± 0.01	56.77 ± 0.32
22	Aged	3.73 ± 0.01	38.13 ± 0.25
23	Aged	3.80 ± 0.09	31.67 ± 0.35
24	Aged	3.63 ± 0.03	40.67 ± 0.25
25	Aged	3.64 ± 0.02	48.43 ± 0.40
26	Aged	4.07 ± 0.02	35.00 ± 0.30
27	Aged	4.20 ± 0.01	37.73 ± 0.21
28	Aged	4.61 ± 0.03	20.04 ± 0.19
29	Aged	3.98 ± 0.03	36.47 ± 0.15
30	Aged	4.55 ± 0.03	29.13 ± 0.05
31	Extra aged	3.95 ± 0.02	31.33 ± 0.15
32	Extra aged	3.97 ± 0.02	24.59 ± 0.56
33	Silver	5.27 ± 0.02	13.46 ± 0.34
34	Extra aged	4.06 ± 0.01	34.43 ± 0.21
35	Aged	4.08 ± 0.04	17.67 ± 0.13
36	Silver	4.56 ± 0.02	38.87 ± 0.42
37	Gold	4.52 ± 0.01	40.83 ± 0.06
38	Aged	4.56 ± 0.01	49.50 ± 0.10
39	Aged	4.86 ± 0.01	20.19 ± 0.07
40	Extra aged	4.70 ± 0.01	28.52 ± 0.12
41	Aged	4.02 ± 0.02	20.12 ± 0.24
42	Silver	4.28 ± 0.01	19.99 ± 0.13
43	Aged	4.58 ± 0.00	27.26 ± 0.05
44	Extra aged	4.42 ± 0.01	40.30 ± 0.00
45	Silver	3.97 ± 0.01	18.13 ± 0.09
46	Aged	4.15 ± 0.01	27.50 ± 0.20
47	Extra aged	4.12 ± 0.01	43.67 ± 0.15
48	Aged	4.30 ± 0.02	11.72 ± 0.01
49	Aged	3.61 ± 0.02	32.10 ± 0.10
50	Extra aged	3.75 ± 0.03	33.40 ± 0.10
51	Silver	4.19 ± 0.05	12.18 ± 0.11
52	Aged	4.14 ± 0.02	14.72 ± 0.23
53	Extra aged	3.97 ± 0.01	23.26 ± 0.21

(b)

Number	Category	Density (g cm^−3)	Sound velocity (m/s)	RI
1	Aged		1596.50 ± 0.12
2	Aged		1550.21 ± 0.04
3	Aged		1612.52 ± 0.46
4	Aged		1620.17 ± 0.45
5	Aged		1595.07 ± 0.20
6	Aged		1608.45 ± 1.34
7	Silver		1597.98 ± 0.60
8	Gold		1611.64 ± 0.34
9	Aged		1596.51 ± 0.40
10	Aged		1589.53 ± 0.40
11	Silver		1613.03 ± 0.16
12	Silver		1596.70 ± 0.12
13	Aged		1606.35 ± 0.78
14	Silver		1591.84 ± 1.13
15	Gold		1606.42 ± 0.01
16	Gold		1599.58 ± 0.04
17	Gold		1631.45 ± 0.04
18	Aged		1607.88 ± 0.05
19	Aged		1603.46 ± 0.41
20	Silver		1596.21 ± 0.40
21	Aged		1611.18 ± 0.01
22	Aged		1609.13 ± 0.03
23	Aged		1607.76 ± 0.09
24	Aged		1596.28 ± 0.13
25	Aged		1595.07 ± 0.08
26	Aged		1595.59 ± 0.15
27	Aged		1604.65 ± 0.01
28	Aged		1611.06 ± 0.18
29	Aged		1609.68 ± 0.28
30	Aged		1601.03 ± 0.10
31	Extra aged		1600.14 ± 0.18
32	Extra aged		1596.28 ± 2.87
33	Silver		1602.26 ± 0.05
34	Extra aged		1599.00 ± 0.03
35	Aged		1597.41 ± 0.09
36	Silver		1598.81 ± 0.03
37	Gold		1599.07 ± 0.09
38	Aged		1602.03 ± 0.01
39	Aged		1602.65 ± 0.06
40	Extra aged		1598.43 ± 0.03
41	Aged		1598.69 ± 0.01
42	Silver		1597.97 ± 3.12
43	Aged		1608.99 ± 0.35
44	Extra aged		1590.15 ± 1.89
45	Silver		1610.59 ± 0.22
46	Aged		1607.91 ± 0.46
47	Extra aged		1601.57 ± 0.18
48	Aged		1607.36 ± 0.27
49	Aged		1586.20 ± 0.85
50	Extra aged		1585.99 ± 0.90
51	Silver		1586.95 ± 0.65
52	Aged		1587.57 ± 1.02
53	Extra aged		1586.91 ± 1.40

RI: refractive index.