Rapid and mobile determination of alcoholic strength in wine, beer and spirits using a flow-through infrared sensor

Table 3 Validation results for density measured with density meter (integrated into the infrared spectrometer)

	Repeatability conditions (n = 5 for wine, n = 10 for beer and spirits)				Within-laboratory reproducibility conditions (n = 5 for wine, n = 6 for beer and spirits)
Sample	Mean (kg/L)	SD (kg/L)	r (kg/L)	RSD [%]	Mean (kg/L)	SD (kg/L)	R (kg/L)	RSD [%]
Wine 1	1.0617	0.00004	0.00011	0.0038	1.0611	0.00063	0.00178	0.0598
Wine 2	1.0125	0.00004	0.00011	0.0040	1.0133	0.00071	0.00198	0.0697
Wine 3	0.9986	<0.00001	<0.00001	<0.00001	0.9993	0.00040	0.00113	0.0403
Wine 4	0.9924	<0.00001	<0.00001	<0.00001	0.9931	0.00042	0.00117	0.0421
Wine 5	0.9948	<0.00001	<0.00001	<0.00001	0.9956	0.00052	0.00146	0.0525
Wine 6	1.0250	0.00004	0.00011	0.0039	1.0257	0.00038	0.00106	0.0370
Beer 1	1.0051	0.00079	0.00222	0.0790	1.0059	0.00138	0.00386	0.1372
Beer 2	1.0074	0.00026	0.00072	0.0257	1.0084	0.00090	0.00253	0.0895
Beer 3	0.9958	0.00195	0.00547	0.1961	0.9976	0.00168	0.00470	0.1681
Fruit spirit	0.9502	0.00068	0.00191	0.0719	0.9510	0.00138	0.00387	0.1453

ISSN: 2661-801X