Verified locator: Respiratory Care 58(10), 1694–1703, October 2013. Original p. 1694 prints Michael D. Davis, Brian K. Walsh, Steve E. Sittig and Ruben D. Restrepo. Section 1.0 distinguishes measured gas tensions/pH from derived bicarbonate. Sections 4.6 and 6.1.2–6.1.9 specify sampling documentation, contamination/delay and calculated-saturation/temperature limitations.