Accession Number : AD0000507


Title :   POLAROGRAPHIC DETERMINATION OF NITRATE IN SEA WATER


Descriptive Note : Technical rept. no. 12


Corporate Author : WASHINGTON UNIV SEATTLE


Personal Author(s) : CHOW, TUNG-WHEI ; ROBINSON, REX J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/000507.pdf


Report Date : Aug 1952


Pagination or Media Count : 27


Abstract : A new method for the determination of nitrate in sea water, based on the polarographic reduction of nitrate in the presence of uranyl ions, was investigated. It was found that sulfate ions depress the reduction current by a definite proportion depending on the chlorinity of the water sample. Chlorinities in the range of 14 to 19 parts per thousand gave a constant effect. Fluoride interfered strongly with the reduction of nitrate, but the use of A1 or ZrO salts satisfactorily eliminated this effect. Other interfering ions and the selection of preservatives are discussed. Validity tests of the proposed procedure indicated that it can be used to determine nitrate in various types of sea water.


Descriptors :   *TEST AND EVALUATION , VALIDATION , REDUCTION , SULFATES , PRESERVATIVES , SELECTION , DETERMINATION , NITRATES , POLAROGRAPHIC ANALYSIS , IONS , SEA WATER


Subject Categories : Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE