Additional file 1.

Calibration lines - Standard curve equations and correlation coefficients for LC-ESI-MS/MS analysis of eicosanoid standards. Calibration lines for liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) analysis were prepared by diluting stock solutions to final concentrations of 100 pg/μL, 50 pg/μL, 25 pg/μL, 10 pg/μL, 5 pg/μL, 2 pg/μL and 1 pg/μL. The internal standard (IS; 16,16-dimethyl prostaglandin F2α) was prepared in ethanol (2 ng/μL) and added to all composite standards at a final concentration of 100 pg/μL.

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de Grauw et al. Arthritis Research & Therapy 2011 13:R123   doi:10.1186/ar3427