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Re-evaluation of colorimetric Cl- data from natural waters with DOC

Water, Air, and Soil Pollution

By:
, , ,
DOI: 10.1007/BF00666264

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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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Re-evaluation of colorimetric Cl- data from natural waters with DOC
Series title:
Water, Air, and 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
Number of Pages:
16