Spectrophotometric Procedures for Determination of Sea Water Alkalinity Using Bromocresol Green

Authors

Jabe A. Breland, University of South Florida
Robert H. Byrne, University of South FloridaFollow

Document Type

Article

Publication Date

1993

Digital Object Identifier (DOI)

https://doi.org/10.1016/0967-0637(93)90149-W

Abstract

Spectrophotometric procedures are presented for the determination of sea water total alkalinity over a range of temperatures and salinities. One-step volumetric acid addition with prompt spectrophotometric measurement of excess acid provides total alkalinities precise to ± 2 micromolal. Excess acid concentrations are quantified using the sulfonephthalein indicator. bromocresol green. Measurements of bromocresol green absorbance ratios [R_{(t) = 616}A/₄₄₄A] at temperature t (°C) and salinity S provide molal scale total hydrogen ion concentrations ([H⁺]_T = [H⁺] + [HSO₄⁻] + [HF]) through the equation

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Deep Sea Research Part I: Oceanographic Research Papers, v. 40, issue 3, p. 629-641

Scholar Commons Citation

Breland, Jabe A. and Byrne, Robert H., "Spectrophotometric Procedures for Determination of Sea Water Alkalinity Using Bromocresol Green" (1993). Marine Science Faculty Publications. 1614.
https://digitalcommons.usf.edu/msc_facpub/1614