Table 1 The linearity range, calibration curve, correlation coefficient (R2), limit of detection (LOD), and recovery of FAs.

From: Simultaneous Quantification of Serum Nonesterified and Esterified Fatty Acids as Potential Biomarkers to Differentiate Benign Lung Diseases from Lung Cancer

FAs

Linearity (n = 3)

LOD (μM)

QC (%)

Recovery (%, n = 3)

FA (μM)

Calibration curve

R2

R1

R2

R3

C16:0

5.0~412.5

Y = 1.184(±0.062)X + 0.256(±0.067)

0.996

0.5

<16

78.8

94.7

95.7

C16:1

1.3~103.1

Y = 0.427(±0.234)X + 0.054(±0.018)

0.998

0.1

<17

95.5

110.0

99.6

C18:0

7.5~625.0

Y = 1.176(±0.061)X−0.147(±0.204)

0.991

2.2

<17

92.8

79.6

93.9

C18:1

7.5~625.0

Y = 0.877(±0.081)X + 0.177(±0.236)

0.996

1.5

<17

92.7

95.2

97.9

C18:2

7.5~625.0

Y = 1.059(±0.041)X−0.139(±0.083)

0.996

1.9

<18

93.4

92.2

97.7

C18:3

0.6~51.6

Y = 1.405(±0.114)X + 0.011(±0.024)

0.995

0.3

<18

107.8

105.5

91.1

C20:4

2.5~206.3

Y = 1.047(±0.077)X−0.205(±0.269)

0.998

0.1

<18

96.6

86.1

91.9

C22:6

1.3~103.1

Y = 0.925(±0.087)X−0.031(±0.122)

0.993

0.3

<16

85.9

96.8

90.6

  1. X: concentration ratios of individual FAs to ISs (37.5 μM for C17:0 and 7.5 μM for C21:0); Y: respective corresponding intensity ratios of FAs to ISs. R1: a mixture of 10.0 μM C16:0, 2.5 μM C16:1, 15.0 μM C18:0, 15.0 μM C18:1, 15.0 μM C18:2, 1.2 μM C18:3, 5.0 μM C20:4, and 2.6 μM C22:6; R2: a mixture of 100.0 μM C16:0, 25.0 μM C16:1, 150.0 μM C18:0, 150.0 μM C18:1, 150.0 μM C18:2, 12.0 μM C18:3, 50.0 μM C20:4, and 26.0 μM C22:6; R3: a mixture of 150.0 μM C16:0, 37.5 μM C16:1, 225.0 μM C18:0, 225.0 μM C18:1, 225.0 μM C18:2, 18.0 μM C18:3, 75.0 μM C20:4, and 39.0 μM C22:6.