The intra-laboratory study of EIM-IRMS® (Ethanol Isotope Measurement–Isotope Ratio Mass Spectrometry) method performance with CS-qNMR (Cumulative Screening–quantitative NMR)

Open Access

Table 3b

Ethanol CS-qNMR Results(ppm vs. DMSO)

Sample No.	Sample name	(D/H)_I^*	(D/H)_II^*	R-value	Amount of beet sugar ethanol in overall wine ethanol (%)
1	Natural I	105.81	135.35	2.57	0.00
2	I-20	103.79	136.63	2.61	13.10
3	I-30	102.78	131.65	2.56	17.04
4	I-40	101.47	134.96	2.66	22.62
5	I-50	100.72	134.06	2.69	26.05
6	I-water15	103.61	130.22	2.54	15¹⁾
7	I-water20	103.08	127.51	2.52	20¹⁾
8	I-sugar syrup	100.72	129.45	2.56	12.2²⁾
9	Natural II	103.27	133.87	2.52	0.00
10	II-20	101.41	130.45	2.53	10.30
11	II-30	100.07	134.47	2.67	14.36
12	II-40	99.52	130.26	2.55	17.37
13	II-50	98.56	129.97	2.60	19.83
14	II-water15	104.91	132.72	2.53	15¹⁾
15	II-water20	102.53	131.78	2.52	20¹⁾
16	II-sugar syrup	100.83	133.19	2.64	4.48²⁾
17	Natural III	99.78	131.81	2.60	0.00
18	III-20	98.07	132.99	2.66	13.06
19	III-30	97.68	131.10	2.61	15.68
20	III-40	96.70	129.97	2.66	20.85
21	III-50	96.26	129.82	2.66	22.46
22	III-water15	100.15	129.51	2.56	15¹⁾
23	III-water20	98.15	129.72	2.67	20¹⁾
24	III-sugar syrup	98.65	133.34	2.66	12.60²⁾

Repeatability standard deviation 1ppm; Reproducibility standard deviation 1,4 ppm.

¹⁾

Dilution with water % (v/v).

²⁾

Expressed as percentage of sugar beet ethanol from sugar syrup in overall wine ethanol.

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