Home-Made Membraneless Vaporization Gas-Liquid Separator for Colorimetric Determination of Ethanol in Alcoholic Beverages

Table 1

Some analytical performance of the proposed MBL-VP unit and the previous MGD formats.

Type of gas separator/operation mode	Chemistry/detection	Analytical performance				References
		Linear range (% v/v)	RSD (%)	LOD (% v/v)	Analysis time per sample (min)
Membrane/FI	Cr2O7^2− oxidation/spectrophotometry	1–30	0.55	0.68	≈3	[36]
Membrane/FI	Ceric (IV)-ethanol complexation/spectrophotometry	0.1–10	<1.3	0.03	3	[27]
Membrane/FI	Enzymatic/spectrophotometry	0.05–0.5	<2.3	0.002	6	[28]
Membrane/FI	Enzymatic/amperometry	0.01–60	0.23–0.65	0.0006	≈0.3–0.5	[29]
Membrane/FI	Cr2O7^2− oxidation/spectrophotometry	Up to 50	<2	—	2	[52]
Membrane/FI	Cr2O7^2− oxidation/potentiometry	Covered the range 3–40 in the samples	0.8	—	2.4	[53]
Membrane/FI	Hypsochromic shift of absorption band of methyl orange/spectrophotometry	5–45	1.3	2.23	3	[54]
Pervaporation/FI	Cr2O7^2− oxidation/spectrophotometry	1–20	3	0.5	10	[33]
Pervaporation/FI	Cr2O7^2− oxidation/spectrophotometry	1–10	<1.5	—	3	[32]
Membraneless/FI	Cr2O7^2− oxidation/spectrophotometry	0.5–30	0.50	0.27	≈3.8	[36]
Membraneless/FI	Cr2O7^2− oxidation/spectrophotometry	5–30	3.7	2.68	2.4	[38]
Membraneless/FI	MnO4^− oxidation/spectrophotometry	5.0–15.0	0.24–0.92	0.26	2.5	[39]
Membraneless/manual	Cr2O7^2− oxidation/spectrophotometry	1.0–90	<10	0.3	≈5	This work

FI: flow injection analysis.