Determination of Methanol, Acetaldehyde, and Ethyl Acetate in Thousand Folds of Ethanol Sample by Headspace Gas Chromatography with Mass Spectrometry

Table 9

Recovery of the HS-GC-MS method.

Concentration level	% recovery
	Acetaldehyde	Ethyl acetate	Methanol	Ethanol
Low concentration	94.73–101.39	96.65–102.94	100.7–104.21	103.79–106.79
Middle concentration	98.45–101.36	99.02–102.31	97.85–104.68	99.19–103.63
High concentration	99.91–101.96	98.97–100.05	99.69–102.40	99.19–102.96