. 2018 May 28;72(10):2607–2615. doi: 10.1007/s11696-018-0516-5

Table 2.

Extrapolated DSC thermoxidation onset temperatures (t_ON/°C) measured at different heating rates (β) for SFO oil samples

Heating rate β/ °C min⁻¹	SFO	BHA	MARJORAM			THYME
Heating rate β/ °C min⁻¹	SFO	0.01%	0.01%	0.03%	0.07%	0.01%	0.03%	0.07%
4.0	145.86 ± 0.47^a	157.71 ± 0.56^cd	152.04 ± 0.54^b	156.17 ± 0.57^c	156.22 ± 0.57^c	152.82 ± 0.61^b	156.68 ± 0.62^c	156.86 ± 0.84^cd
7.5	159.37 ± 0.52^a	164.53 ± 1.00^bc	159.47 ± 0.97^a	161.90 ± 1.08^a	167.97 ± 1.12^c	162.84 ± 0.87^ab	166.17 ± 0.89^c	166.93 ± 0.90^c
10.0	167.84 ± 0,78^a	170.01 ± 0.60^ab	168.74 ± 0.59^a	170.42 ± 0.91^ab	172.30 ± 0.92^b	166.76 ± 1.13^a	168.02 ± 1.14^a	168.94 ± 1.15^a
12.5	171.98 ± 0.56^a	175.58 ± 0.57^ab	172.09 ± 0.56^a	172.42 ± 0.71^a	174.93 ± 0.72^ab	172.45 ± 1.44^a	174.37 ± 1.45^ab	175.34 ± 1.46^ab
15.0	176.08 ± 1.17^a	179.01 ± 1.24^a	176.10 ± 1.22^a	177.64 ± 1.23^a	178.14 ± 1.23^a	176.52 ± 1.22^a	177.11 ± 1.48^a	177.55 ± 1.48^a

	OREGANO			THYME + BHA	OREGANO + BHA	OREGANO + THYME
	0.01%	0.03%	0.07%	0.005% + 0.005%	0.005% + 0.005%	0.015% + 0.015%
4.0	155.22 ± 0.42^c	158.44 ± 0.87^d	159.35 ± 0.69^d	159.01 ± 0.85^d	153.65 ± 0.72^b	155.18 ± 0.70^c
7.5	163.29 ± 0.58^b	164.04 ± 0.58^bc	165.68 ± 0.82^b	162.62 ± 0.87^ab	166.13 ± 1.06^bc	159.72 ± 0.88^a
10.0	168.01 ± 0.90^a	169.45 ± 1.39^b	170.53 ± 1.16^ab	173.88 ± 1.43^b	171.68 ± 1.16^b	167.73 ± 0.85^a
12.5	172.41 ± 0.85^a	173.01 ± 0.95^a	175.48 ± 0.97^ab	177.49 ± 1.48^bc	180.03 ± 0.58^c	172.68 ± 1.10^a
15.0	176.83 ± 1.00^a	179.05 ± 1.24^a	179.41 ± 1.34^ab	180.22 ± 1.53^ab	184.39 ± 1.49^b	176.09 ± 1.32^a

The results are mean ± standard deviation. Values marked by the different lower case superscript letters (a–d) within a row denote statistically significant differences (P < 0.05)