Crude Oil Source Identification of Asphalt via ATR-FTIR Approach Combined with Multivariate Statistical Analysis

Table 7

The scores of each principal component.

Asphalt number	Asphalt name^2	PCA1	PCA2	PCA3
1	MM-1	−0.446	−0.840	−0.024
2	Q-1	−0.537	0.876	1.484
3	SK (BY)-1	−0.870	−0.225	−0.392
4	Q-2	−0.383	0.118	−1.233
5	SL-1	−0.986	0.240	−0.471
6	CMR-1	−1.796	0.963	−0.386
7	LH-1	−0.865	−1.151	0.438
8	QPK-1	−0.123	−0.995	−0.555
9	MM-2	−1.042	−0.455	−0.089
10	QP-1	−0.593	−1.212	−0.046
11	JB-1	−0.742	−1.037	−0.711
12	SK (XY)-1	−1.152	−0.335	0.338
13	ZH-1	−0.470	−0.919	−0.641
14	JL-1	−0.113	−0.717	−1.306
15	HR-1	−0.523	−0.757	0.423
16	AS-1	−0.316	−0.098	1.739
17	XT-1	−0.268	0.156	2.187
18	ZH-2	0.418	2.666	−0.827
19	LH-2	−0.434	2.149	−1.062
20	QL-1	−0.451	0.336	0.688
21	KL-1	0.175	−0.225	−0.545
22	KL-2	−0.153	0.221	0.312
23	SL-2	0.627	1.081	0.147
24	SK (NB)-1	−0.268	0.156	2.187
25	Q-3	0.418	2.666	−0.827
26	DSZ-1	0.175	−0.225	−0.545
27	CMR-2	−0.153	0.221	0.312
28	JB-2	1.536	−0.789	−0.679
29	ZH-3	1.626	−0.611	−1.122
30	LH-3	2.273	0.072	1.503
31	DSZ-2	1.536	−0.789	−0.679
32	SZ-1	1.626	−0.611	−1.122
33	SZ-2	2.273	0.072	1.503

²In this column, 1, 2, and 3 indicate the different sampling batches of the same asphalt.