Abstract
A series of laboratory and field studies were conducted to evaluate the reliability of colorimetric pH indicators in dilute, acidic surface waters in New England. Laboratory studies consisted of comparing colorimetric and electrometric pH results in synthetic solutions with a range of ionic strength and buffering capacity. Field studies involved simultaneous colorimetric and electrometric pH determinations in 52 New England lakes with differing water chemistry. Colorimetric indicators deviated from electrometric pH results at low alkalinities and near the end of their operating range. They agreed with electrometric values, within 0.2 unit, at alkalinities of 20 µeq 1-1 and greater, or near the center of their operating range. Changing ionic strength without changing buffering capacity did not affect results. When indicators were selected that bracketed sample pH, colorimetric determinations of pH in New England lakes agreed well with electrometric determinations.
Similar content being viewed by others
References
Bates, R., 1973. Determination of pH. John Wiley & Sons, N.Y., U.S.A., 479 pp.
Boyd, C., 1976. An evaluation of a water analysis kit. Agric. exp. Stn Leafl. 92, Auburn University, Alabama, U.S.A., 3 pp.
Boyd, C., 1977. Evaluation of a water analysis kit. J. Envir. Qual. 6: 381–384.
Boyd, C., 1980. Reliability of water analysis kits. Trans. am. Fish. Soc. 109: 239–243.
Dole, M., 1941. The glass electrode. John Wiley & Sons, N.Y., U.S.A., 332 pp.
Pfeiffer, M. & Festa, P., 1980. Acidity status of lakes in the Adirondack region of New York in relation to fish resources. N.Y. Dept. Envir. Conserv. Rep. FW-P168 (10/80), 36 pp.
Spikkelaud, I., 1977. Acidotrofe vann og dammer i Bygland, Aust-Agder. En undersøkelse av hydrografi og limnetiske og litorale crustaće-samfunn. (Acidtrophic lakes and ponds in Bygland, Aust-Agder. An investigation of hydrography and of limnetic and littoral crustacean communities.) Ph.D. Thesis, Univ. Oslo, Norway, 118 pp.
Stumm, W. & Morgan, J., 1970. Aquatic Chemistry. Wiley Interscience, N.Y., U.S.A., 583 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Haines, T.A., Akielaszek, J.J., Norton, S.A. et al. Errors in pH measurement with colorimetric indicators in low alkalinity waters. Hydrobiologia 107, 57–61 (1983). https://doi.org/10.1007/BF00126704
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00126704