Research Article

Optimization of the Extraction of the Volatile Fraction from Honey Samples by SPME-GC-MS, Experimental Design, and Multivariate Target Functions

Table 3

Regression results for the signal intensity (a) and repeatability (b) models: effects estimates and their standard error, -Student calculated, significance -level calculated, regression coefficients, and their standard error.
(a) Regression results: model of the signal intensity

EffectStd err
(effect)
-Student-levelCoeff Std err
(coeff)

Mean/interc.30.400.4469.80.00030.400.44
−8.000.92−8.700.000−4.000.46
−10.400.92−11.30.000−5.200.46
salt−6.300.92−6.850.000−3.200.46

(b) Regression results: model of the repeatability

EffectStd err
(effect)
-Student-levelCoeffStd err
(coeff)

Mean/interc.11.01.38.750.00011.01.3
−10.02.7−3.880.008−5.01.3
6.02.72.210.0693.01.3