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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