原油样品

[V/V + Ni] TLC沥青质

[V/V + Ni] TLC原油

偏差（%）^a

DM8

0.906 ± 0.005

0.916 ± 0.004

1.1 (t = 0.329)

Boscan

0.933 ± 0.004

0.931 ± 0.003

−1.3 (t = 0.074)

Carabobo

0.865 ± 0.004

0.861 ± 0.003

−0.4 (t = 0.149)

Monagas

0.801 ± 0.002

0.799 ± 0.003

−0.2 (t = 0.074)

^at_critical(α,   0.05; γ₁ + γ₂, 6) = 2.450.

原油样品

[V/V + Ni] TLC参考油^a

[V/V + Ni] TLC原油

偏差（%）^b

DM8

0.934

0.916 ± 0.004

1.9

Boscan

0.924

0.931 ± 0.003

0.8

Carabobo

0.823

0.861 ± 0.003

4.6

Monagas

0.816

0.799 ± 0.003

2.1

Hamaca

0.820

0.849 ± 0.004

3.5

DM115

0.936

0.934 ± 0.004

0.2

^a推荐值由表2得出。^b配对资料t检验 = 0.647.t_critical(α, 0.05; 5) = 2.57.