. 2021 Feb 16;10(2):428. doi: 10.3390/foods10020428

Table 2.

Equations and R-squared values of linear, power and polynomial trend lines fitted to the evaporative light scattering detection response as a function of the analyzed lipid mass for different free fatty acids (FFAs) and triacylglycerols (TAGs) (Figure 2). Also listed are the retention times of the FFAs and TAGs. Column values with differing letters are significantly different from each other (p < 0.05).

Lipid		Linear Trend Line ^a		Power Trend Line		Polynomial Trend Line		Retention Time ^b (min)
Lipid		Equation	R²	Equation	R²	Equation	R²	Retention Time ^b (min)
FFAs	Lauric acid	y = 2.787x – 2.020	0.888	y = 0.585x^0.855	0.647	y = 1.419x² - 1.386x + 0.182	0.992	9.38 ± 0.02 ^A
	Palmitic acid	y = 21.517x – 5.520	0.999	y = 14.342x^1.185	0.983	y = 2.215x² + 14.363x − 0.894	0.998	9.40 ± 0.05 ^A
	Stearic acid	y = 24.384x – 5.961	0.999	y = 16.889x^1.150	0.986	y = 2.447x² + 16.513x − 0.913	0.998	9.39 ± 0.02 ^A
	Oleic acid	y = 22.912x – 6.591	0.998	y = 14.974x^1.177	0.987	y = 3.126x² + 13.148x − 0.679	0.999	9.39 ± 0.02 ^A
	Linoleic acid	y = 22.747x – 7.277	0.992	y = 14.337x^1.157	0.984	y = 4.076x² + 10.411x − 0.305	1.000	9.39 ± 0.01 ^A
	Linolenic acid	y = 22.698x – 5.479	0.997	y = 15.859x^1.193	0.992	y = 2.703x² + 14.366x − 0.576	0.999	9.40 ± 0.04 ^A
	Cervonic acid	y = 8.810x – 2.972	0.995	y = 5.121x^1.166	0.958	y = 1.500x² + 4.179x − 0.241	0.999	9.39 ± 0.01 ^A
TAGs	Tripalmitin	y = 20.345x – 6.634	0.997	y = 12.091x^1.359	0.995	y = 3.177x² + 10.445x − 0.671	0.999	5.47 ± 0.02 ^C
TAGs	Trilinolein	y = 13.429x – 5.975	0.981	y = 6.424x^1.396	0.986	y = 3.445x² + 3.030x − 0.134	0.999	5.52 ± 0.01 ^B

^a Data points < 0.5 µg lipid were excluded to fit the linear trend line; ^b Average values with corresponding standard deviations of eighteen measurements. Column values with differing letters are significantly different from each other (p < 0.05).