Re-evaluation of colorimetric Cl- data from natural waters with DOC
Water, Air, & Soil Pollution
By: S. A. Norton, M.J. Handlet, J. S. Kahl, and N.E. Peters
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Abstract
Colorimetric Cl- data from natural solutions that contain dissolved organic carbon (DOC) may be biased high. We evaluated aquatic Cl- concentrations in ecosystem compartments at the Bear Brook Watershed, Maine, and from lakes in Maine, using ion chromatography and colorimetry. DOC imparts a positive interference on colorimetric Cl- results proportional to DOC concentrations at approximately 0.8 ??eq Cl-/L per mg DOC/L. The interference is not a function of Cl- concentration. The resulting bias in concentrations of Cl- may be 50% or more of typical environmental values for Cl- in areas remote from atmospheric deposition of marine aerosols. Such biased data in the literature appear to have led to spurious conclusions about recycling of Cl- by forests, the usefulness of Cl- as a conservative tracer in watershed studies, and calculations of elemental budgets, ion balance, charge density of DOC, and dry deposition factors.
Suggested Citation
Norton, S.A., Handlet, M., Kahl, J.S., Peters, N., 1996, Re-evaluation of colorimetric Cl- data from natural waters with DOC: Water, Air, & Soil Pollution, v. 91, no. 3-4, p. 283-298, https://doi.org/10.1007/BF00666264.
ISSN: 1573-2932 (online)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Re-evaluation of colorimetric Cl- data from natural waters with DOC |
| Series title | Water, Air, & Soil Pollution |
| DOI | 10.1007/BF00666264 |
| Volume | 91 |
| Issue | 3-4 |
| Year Published | 1996 |
| Language | English |
| Publisher | Springer |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Water, Air, and Soil Pollution |
| First page | 283 |
| Last page | 298 |