The guide authored by Dickson et al. (2007) is a key source of information for measurements of paramaters of the carbonate chemistry. A new version of “SOP 6a: Determination of the pH of sea water using a glass / reference electrode cell” is available. This revised version corrects a typo in equation 4 of the buffer recipe.
Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 191 pp. Revised version of SOP 6a.