Visible/Near-Infrared Spectroscopy Devices and Wet-Chem Analyses for Grapes (Vitis vinifera L.) Quality Assessment: An Environmental Performance Comparison

Table 3

Quantity, allocation factor, lifetime, and amount per analysis for pH determination.

	Unit	Quantity (Q)	Allocation factor (Af)	Lifetime (years)	Lifetime (no. analyses)	Amount per analysis^†
Input
Must	g	50	1.00	n.a.	1	50.000
Automatic volumetric titrator	g	20 × 10^3	0.50	15.00	6750	1.481
Computer	g	13 × 10^3	0.33	15.00	6750	0.636
Plastic glasses	g	2.27	3.00	1	1	6.810
Deionised water (for workspace washing)	g	200	0.10	n.a.	1	20.000
Deionised water (for instrument washing)	g	200	0.20	n.a.	1	40.000
Buffer solution (pH 4)	g	50	2.00	1	1	100.000
Buffer solution (pH 7)	g	50	2.00	1	1	100.000
Electricity	kWh	0.059	1.00	n.a.	1	0.059
Output
Plastic waste	g	6.81	n.a.	n.a.	n.a.	n.a.
Chemical waste	g	210	n.a.	n.a.	n.a.	n.a.

^††Quantity × allocation factor/no. of analyses.