Quantitative analysis and detection of chaptalization and watering down of wine using isotope ratio mass spectrometry

Open Access

Table 5.

Ethanol δD_n comparative results from three laboratories.

		Lab 1 (Imprint Analytics GmbH)			Lab 2 (Izotoptech Ltd.) in Debrecen, Hungary)			Lab 3 (C.N.R.I.F.F.I.)
		Ethanol δD_n	sR^∗∗	Sr^∗∗∗	Ethanol δD_n	sR^∗∗	Sr^∗∗∗	Ethanol δD_n	sR^∗∗	Sr^∗∗∗
		mean value ^∗			mean value ^∗			mean value ^∗
Authentic	DB73-01	−214.22	0.71	0.88	−214.32	0.47	1.45	−214.64	0.79	0.76
30 g/L Beet Sugar	DB73-02	−222.41	1.97	0.93	−220.15	1.33	0.98	−220.02	2.08	0.73
20% v/v water dilution	DB73-03	−218.30	0.35	1.70	−217.69	0.91	0.97	−218.49	3.28	0.60
Authentic	DB73-04	−212.26	0.83	1.51	−213.82	0.68	1.44	−212.97	1.06	0.75
30 g/L Beet Sugar	DB73-05	−220.27	0.28	1.44	−220.14	0.37	1.50	−220.73	1.50	0.61
20%v/v water dilution	DB73-06	−219.46	1.47	1.39	−216.84	1.43	0.62	−218.01	3.33	0.43
20 g/L Beet Sugar	DB73-07	−215.36	0.92	0.72	−216.53	2.22	1.04	−217.46	0.99	0.92
Authentic	DB73-08	−215.92	0.31	1.21	−216.63	1.27	1.17	−216.30	1.23	0.53
30 g/L Beet Sugar	DB73-09	−220.90	0.84	1.11	−221.16	1.76	0.62	−221.14	0.87	0.63
20% v/v water dilution	DB73-10	−223.67	0.71	0.73	−220.84	1.62	0.87	−220.76	0.34	0.73
Average			0.84	1.16		1.21	1.07		1.55	0.67
* Expressed in ‰ vs. AAWES at SGI Scale.
** sR – Intra-laboratory Reproducibility standard deviation as standard deviation of all measurements of the same sample from one laboratory expressed in ‰.
*** sr – Intra-laboratory Repeatability standard deviation as average standard deviation for the same sample from one laboratory expressed in ‰.

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