. Author manuscript; available in PMC: 2015 Mar 15.

Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2014 Feb 4;0:62–67. doi: 10.1016/j.jchromb.2014.01.045

Table 1.

The signal-to-noise (S/N) ratio and the Lowest Level of Detection(LLOD) are presented for 1,25-DHVD3-Amplifex diene derivative and 1,25-DHVD2-PTAD derivative.

15.6 pg/mL calibration standard ID	Observed S/N ratio	Estimated LLOD^* pg/mL
1,25-DHVD2-Amplifex diene dvt.	30:1	2
1,25-DHVD3-Amplifex diene dvt.	30:1	2
1,25-DHVD2-PTAD dvt.	no signal	30
1,25-DHVD3-PTAD dvt.	3:1	15

Based upon 3:1 signal-to-noise ratio.