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Improving Spectrophotometric Carbon System Measurements, Mark Patsavas
Improving Spectrophotometric Carbon System Measurements, Mark Patsavas
USF Tampa Graduate Theses and Dissertations
This work provides improved procedures for spectrophotometric carbon system measurements. Indicator dyes used for routine spectrophotometric pH measurements in seawater suffer from impurity issues, which introduce vendor-specific systematic errors in pH determinations. The magnitude of these errors for several vendors was investigated for meta Cresol Purple (mCP) and Cresol Red (CR). Flash chromatography procedures were developed to obtain purified mCP and CR on a bulk scale in order to supply the oceanographic research community with the indicators. Easy access to the purified indicators ensures global intercomparability of spectrophotometric pH determinations.
Internal consistency of marine inorganic carbon system measurements was studied …