Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-22T17:26:03.205Z Has data issue: false hasContentIssue false
  • English
  • Français

The Estimation in Sea-Water Solutions of Micro-Quantities of Mercury in the Presence of Copper by Means of Dithizone

Published online by Cambridge University Press:  11 May 2009

H. Barnes
H. Barnes
Affiliation:
Chemist, The Corrosion Committee, Iron and Steel Institute (From the Marine Station, Millport)
Get access Rights & Permissions [Opens in a new window]

Extract

1. A brief survey is given of the methods for the estimation of mercury by means of dithizone.

2. The precautions necessary in mercury estimations are outlined and the stability of dithizone in chloroform solutions shown to be satisfactory.

3. Data are presented on the rate of extraction of copper, from sea-water solutions, at low pH values with chloroform and carbon tetrachloride solutions of the reagent. Using the former solvent the rate of extraction of copper is shown to be slow, while mercury is rapidly extracted under the same conditions.

4. The use of potassium cobalticyanide in combination with a chloroform solution of dithizone has enabled a method to be developed which eliminates interference of copper in mercury estimations; with the procedure given, mercury in concentrations of 1 to 55µg/l. may be determined in the presence of copper concentrations up to 69 mg./l.

5. Copper may be determined in the same solution subsequent to the mercury estimation by the use of sodium diethyldithiocarbamate, after the solution has been made alkaline with ammonium hydroxide.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 26 , Issue 3 , July 1946 , pp. 303 - 311
Copyright
Copyright © Marine Biological Association of the United Kingdom 1946

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Greenleaf, C. A., 1942. Report on copper. Journ. Ass. Off. Agric. Chem. U.S.A., Vol. 25, p. 266.Google Scholar
Harris, J. E., 1945. Report of anti-fouling investigations. Journ. Iron Steel Inst. (in the Press).Google Scholar
Hubbard, D. M. 1940. The determination of mercury in urine. Ind. Eng. Chem. (Anal. Ed.), Vol. 12, p. 768.Google Scholar
Ketchum, B. H., Ferry, J. D., Redfield, A. C. & Burns, A. E., 1945. Evaluation of anti-fouling paints by leaching rate determinations. Ind. Eng. Chem., Vol. 37, p. 456.Google Scholar
Laug, E. P. & Nelson, K. W. 1942. Report on mercury. Journ. Ass. Off. Agric. Chem. U.S.A., Vol. 25, p. 399.Google Scholar
Sandell, E. B., 1937. Determination of copper, zinc and lead in silicate rocks. Ind. Eng. Chem. (Anal. Ed.), Vol. 9, p. 464.Google Scholar
Sandell, E. B., 1944 Colorimetric Determination of Traces of Metals. New York.Google Scholar
Wichmann, H. J., 1939. Isolation and determination of traces of metals by the dithizone system. Ind. Eng. Chem. (Anal. Ed.), Vol. II, p. 66.Google Scholar