Table 1 | Comparison of the retention times..

HPLC Analysis
Sample	Area	Retention time^b (min)
Authentic BCPN, ppm 5 10 20 50 100	- 176026±185 6605644±1239 10790905±985 14311427±198 28009844±251	- 28.48±0.15^D 27.59±0.08^A 27.43±0.11^A 28.00±0.09^B 28.32±0.15^C
Urinary BCPN	5253622±1023	28.23±0.11C

GC/MS Analysis
Authentic BCPN	-	18.00±0.11^B
Urinary BCPN	-	17.30±0.09^A

^aTreated as described in section “Materials and methods” of the text.
^bDetermination was performed in five replicates.
Different upper case superscripts indicate significant deviation (p<0.05) in either
HPLC or GC/MS analysis.

Table 1: Comparison of the retention times between the standard BCPN and the urinary BCPN analyzed by HPLC and GC/MS^a.

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