The retention times are calculated from the moment the sample is injected
in the chromatographic column (IT FLASH or GC INJECTION). In the chromatogram, this
corresponds to the first peak observed in time, which is generated by the
flash heating of the injection trap (IT) of SAM-GC. This time is 
653088643.34 s (sclk) for GC 1 chromatogram and 
653092583.72 s (sclk) for GC 2 chromatogram. The retention times are 
calculated by subtracting this time, to the times of the peaks maxima.
The original TCD chromatograms are available in the file noise.csv.

GC column 1 run

peak 0 ;  GC1 INJECTION ; 0
peak 1 ;   ; 205
peak 2 ;   ; 271
peak 3 ;  ; 479
peak 4 ;  ; 478
peak 5 ;   ; 786
peak 6 ;  ; 1496
peak 7 ;  ; 1583

GC column 2 run

peak 8 ; GC2 IT FLASH 1  ; 0
peak 9 ;   ; 600
peak 10 ;   ; 793
peak 11 ;  ; 1075


The abundance given in the table (species.csv) corresponds to the area of the 
most abundant mass peak which are measurable for each peak. The unit is 
counts/sec/sec. There is no baseline correction for this fit.
These surfaces are proportional to the amount of the species
detected when a peak is eluted. When peaks are co-eluted (over of different
peaks), the peaks are fitted using a gaussian function. If the fit does not work, 
only one surface value is given, corresponding to the sum of the
abundances of the species contributing to the peak.