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A MODIFIED FIELD VERSION OF THE WINKLER DETERMINATION OF DISSOLVED OXYGEN FOR TESTING REMOTE SOURCES OF WATER
Author(s) -
WRIGHT R. C.
Publication year - 1983
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1983.tb03466.x
Subject(s) - sodium azide , manganese , oxygen , chemistry , precipitation , inorganic chemistry , environmental chemistry , analytical chemistry (journal) , organic chemistry , meteorology , physics
S ummary A modification of a simple field method (Drew and Robertson, 1974) for the Winkler determination of dissolved oxygen is described. The modification, involving the addition of sulphuric acid and sodium azide as preserving agents rather than the precipitation of manganese hydroxides in the field, gives more accurate results when samples have to be stored before completion of the determination.