. Author manuscript; available in PMC: 2006 Sep 12.

Published in final edited form as: J Chromatogr A. 2006 Jan 18;1105(1-2):51–58. doi: 10.1016/j.chroma.2005.11.074

Table 1.

Calibration sample chemicals: relative amounts, expected relative differences, observed relative differences, and relative error

Chemical	Analyzed relative amount	Reference relative amount	Expected relative difference	Observed relative difference	Relative error (%)
Benzene	0.090	4.399	- 0.9599	- 0.9602	- 0.03
Toluene	13.500	0.879	0.8777	0.8761	- 0.17
Ethylbenzene	0.450	8.798	- 0.9027	- 0.9011	0.15
Orthoxylene	0.900	0.439	0.3444	0.3449	0.05
1,2,4-Trimethylbenzene	0.900	2.209	- 0.4211	- 0.4191	0.20