A liquid-extraction procedure for the concentration of zinc in
sea water was developed. The metal ion in sea water was chelated
with sodium diethyldithiocarbamate and extracted into an organic
solvent, methylisobutylketone, at the normal pH of sea water. A
back-extraction into HCl followed, providing a concentration of 30X
for the entire procedure.
Filtration was introduced into the procedure to insure that only
dissolved forms were extracted and that no influence from particulate
matter would be detected. Problems of loss of zinc and/or
contamination arose. These were overcome to a great extent by
washing all glassware, including the sinterred-glass filter holder,
in nitric acid and by following the filtration through the glass holder
with an acid rinse. Purification of reagents was found necessary.
With replicate analyses on a given sea water source, the
recovery was 97 ± 2%. Upon making varying standard additions to
subsamples of sea water, the calculated recovery was 97 ± 5.4%.
The contamination figure for the extraction process ranged from
zero to 0.8 ppb in the original sea water sample. With filtration,
an overall median contamination of 1.4 ± 1 ppb was determined. / Graduation date: 1967
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/28191 |
| Date | 10 May 1967 |
| Creators | Buffo, Lynn Karen |
| Contributors | Osterberg, Charles L., Forster, William O. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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