Table 1.

Concentrations of synthetic solutions containing lactones.

Compound	Concentrations (μg/L)
	Low level	High level	Optimization
γ-Butyrolactone	14400	36200	20300
γ-Hexalactone	146	365	98.9
γ-Heptalactone			494
Whiskey-lactone I	48.3	144	100
γ-Octalactone	3.96	9.90	9.9
Whiskey-lactone II	48.3	144	100
γ-Nonalactone	19.8	59.5	100
γ-Decalactone	3.83	9.56	9.9
δ-Decalactone	124	310	96.8
γ-Undecalactone	1.92	4.80	9.9
3,4-Dimethylphenol			491