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Table 3 Peak integration errors* caused by three alignment methods

From: An iterative block-shifting approach to retention time alignment that preserves the shape and area of gas chromatography-mass spectrometry peaks

 

1

2

3

4

COW area %error ± SD

8.7 ± 5.2

4.7 ± 3.8

3.0 ± 2.4

4.5 ± 3.2

XCMS area %error ± SD

0.17 ± 00.14

1.29 ± 0.91

0.50 ± 0.89

0.11 ± 0.10

Block-shift area %error ± SD

0.000 ± 0.00

0.002 ± 0.01

0.18 ± 0.80

0.000 ± 0.00

Block vs . COW ( t -test P val.)

<10-10

<10-10

<10-10

<10-10

Block vs . XCMS ( t -test P val. )

<10-10

<10-10

0.08

<10-10

  1. *area %error = 100% × (areaaligned - arearaw)/arearaw