Voltammetry in the analysis of atmospheric pollutants: The determination of toxic trace metals in rain water and snow by differential pulse stripping voltammetry

Abstract A new particularly sensitive and reliable procedure to determine trace metal levels in rain and snow is presented. The simultaneous determination of Cu, Pb, Cd and Zn by differential pulse anodic stripping voltammetry (DPASV) and of Se by differential pulse cathodic stripping voltammetry (DPCSV) at the hanging mercury drop electrode(HMDE) demonstrates the versatile potentialities of this approach to follow trace metal levels in the dissolved state and that bound to particulate matter associated with rain water and snow. Applications of the method have emphasized the significance of rain and snow for transport of toxic trace metals from the atmosphere to terrestrial and marine biota. Results of regional significance from investigations on the time function of toxic trace metal levels during rain periods, until constant values are attained, are reported. Further regional studies were related to the influences of meteorological parameters (wind), the location of pollution sources and the daily amounts of toxic trace metal input to the ground during longer rain falls. The results obtained suggest that over 90% of the precipitated trace metals are dissolved in rain water and that snow is a particular efficient medium to remove trace metals from the atmosphere to the ground. General aspects of a surveillance network for toxic metal pollution of atmospheric precipitates by the presented low cost procedure are discussed.

[1]  M. Shuman,et al.  Intermetallic compound formation between copper and zinc in mercury and its effects on anodic stripping voltammetry , 1976 .

[2]  H. Werner,et al.  Test of a quantitative approach to secondary ion mass spectrometry on glass and silicate standards , 1977 .

[3]  L. Fishbein.  Mutagens and potential mutagens in the biosphere. II. Metals--mercury, lead, cadmium and tin. , 1974, The Science of the total environment.

[4]  G. C. Barker.  SQUARE WAVE POLAROGRAPHY AND SOME RELATED TECHNIQUES , 1958 .

[5]  H. Nürnberg,et al.  Ein Verfahren zur raschen voltammetrischen Simultanbestimmung der toxischen Spurenmetalle Cd und Pb im Harn , 1978 .

[6]  E. I. Hamilton,et al.  Review of the chemical elements and environmental chemistry--strategies and tactics. , 1976, The Science of the total environment.

[7]  Jud B. Flato,et al.  Renaissance in polarographic and voltammetric analysis , 1972 .

[8]  K. Brainina.  Stripping voltammetry in chemical analysis , 1974 .

[9]  T. J. Chow,et al.  Chemical concentrations of pollutant lead aerosols, terrestrial dusts and sea salts in Greenland and Antarctic snow strata☆ , 1969 .

[10]  R. Fergus,et al.  Rain water acidity: pH spectrum of individual drops☆ , 1976 .

[11]  W. Kemula.  The application of stripping processes in voltammetry , 1970 .

[12]  B. Raspor,et al.  The chelation of cadmium with NTA in sea water as a model for the typical behaviour of trace heavy metal chelates in natural waters , 1978 .

[13]  E. I. Hamilton,et al.  The chemical elements and human morbidity--water, air and places--a study of natural variability. , 1974, The Science of the total environment.

[14]  R. Shuster,et al.  Determination of sub-nanogram amounts of silver in rain water by stable isotope dilution , 1978 .

[15]  H. Nürnberg.  Polarography and voltammetry in studies of toxic metals in man and his environment. , 1979, The Science of the total environment.

[16]  T. Risby,et al.  Ultratrace metals in some environmental and biological systems. , 1976, Analytical chemistry.

[17]  A. Bond,et al.  Trace zinc determination in acid media by differential pulse anodic stripping voltammetry at a hanging drop mercury electrode , 1976 .

[18]  H. Nürnberg.  Potentialities and applications of advanced polarographic and voltammetric methods in environmental research and surveillance of toxic metals , 1977 .

[19]  D. Henschler,et al.  Veränderungen der Umwelt ‐ Toxikologische Probleme , 1973 .

[20]  P. Valenta,et al.  New potentialities in ultra trace analysis with differential pulse anodic stripping voltammetry , 1977 .

[21]  R. E. Lee,et al.  Trace metal pollution in the environment. , 1973, Journal of the Air Pollution Control Association.

[22]  R. K. Skogerboe,et al.  Elimination of copper-zinc intermetallic interferences in anodic stripping voltammetry , 1974 .