Spectrophotometric Procedures for Determination of Sea Water Alkalinity Using Bromocresol Green
Digital Object Identifier (DOI)
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) = 616A/444A] at temperature t (°C) and salinity S provide molal scale total hydrogen ion concentrations ([H+]T = [H+] + [HSO4−] + [HF]) through the equation
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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.