TY - JOUR
T1 - Seawater pH Measurements: an At-sea Comparison of Spectrophotometric and Potentiometric Methods
AU - Byrne, R. H.
AU - Robert-Baldo, G.
AU - Thompson, S. W.
AU - Chen, C. T.A.
PY - 1988/1/1
Y1 - 1988/1/1
N2 - Spectrophotometric procedures utilizing sulfonephthalein indicators provide rapid, quantitative measurements of seawater pH. In a series of shipboard comparison, the average difference between our spectrophotometric and potentiometric pH measurements was 0.012 ± 0.010 + ph (spec., 20°C, free H + scale) - pH (potent., 25°C, NBS scale). The ±0.010 S.E. obtained in our at-sea comparison suggests that the imprecision associated with either type of measurement was <±0.010. Spectrophotometric procedures involving dissolved sulfonephthalein indicators appear well suited to in situ analysis of both pH and alkalinity.
AB - Spectrophotometric procedures utilizing sulfonephthalein indicators provide rapid, quantitative measurements of seawater pH. In a series of shipboard comparison, the average difference between our spectrophotometric and potentiometric pH measurements was 0.012 ± 0.010 + ph (spec., 20°C, free H + scale) - pH (potent., 25°C, NBS scale). The ±0.010 S.E. obtained in our at-sea comparison suggests that the imprecision associated with either type of measurement was <±0.010. Spectrophotometric procedures involving dissolved sulfonephthalein indicators appear well suited to in situ analysis of both pH and alkalinity.
UR - https://digitalcommons.usf.edu/msc_facpub/1681
UR - https://doi.org/10.1016/0198-0149(88)90091-X
U2 - 10.1016/0198-0149(88)90091-X
DO - 10.1016/0198-0149(88)90091-X
M3 - Article
VL - 35
JO - Deep Sea Research Part A. Oceanographic Research Papers
JF - Deep Sea Research Part A. Oceanographic Research Papers
ER -