Some problems on the silicate analysis method for sea water.

The molybdenum yellow method (Robinson, R. J. and T. G. Thompson, 1948 and Oceanographical Society of Japan, 1963) has been generally applied for silicate analysis of sea water in the serial oceanographic observations in Japan. However, it seems this method has some problems to be solved concerning reagent concentrations and standard solutions. This report is an experimental study on the molybdenum yellow method for the analysis of reactive silicate in sea water. Optical characteristics of the photoelectric colorimeter for silicate analysis and effects of reagent concentration, temperature and salts in sample solution on color development of molybdenum yellow were examined and also difference of absorbancy between sodium silicate standard solution and potassium chromate solution was checked. From these experimental results, it is concluded that some correction must be added as soon as possible to silicate data obtained by a photoelectric colorimeter which was calibrated with potassium chromate solution as the standard.

Bibliographic Details

Main Author:	Higano, Ryoji
Format:	Journal Contribution biblioteca
Language:	Japanese
Published:	1968
Online Access:	http://hdl.handle.net/1834/16388
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