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A simple colorimetric method for determining seawater alkalinity using bromophenol blue

Nand, Vikashni; Ellwood, Michael


The development of small portable USB‐spectrophotometer systems makes monitoring alkalinity and pH possible in the field and remote locations. Here, we present a method utilizing purified bromophenol blue (BPB) as an end‐point indicator for making simple one‐point alkalinity measurements with spectrophotometric detection. The approach utilizes purified BPB dye whose absorbance characteristics have been determined over a range of temperatures and salinities. The end‐point pH for titrated samples...[Show more]

CollectionsANU Research Publications
Date published: 2018-07-12
Type: Journal article
Source: Limnology and Oceanography: Methods
DOI: 10.1002/lom3.10253
Access Rights: Open Access


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