Analytical Chemistry. Plenary Lectures Presented at the by A. Hulanicki

By A. Hulanicki

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6 and 448 nm Fluorescence Manual and automatic;— specific for N 0 2 ( N O is measured after oxidation to N02) Non-specific—automatic Specific for NO—continuous (NO2 is measured after catalytic conversion to NO) Specific for N 0 2 (NO is measured after oxidation) for the determination of these compounds. When ozone is added to a gas stream containing nitrogen oxide, the following reactions take place : NO + 0 , NO* + NO, + 0 , + NO* + 0 2 N 0 2 +/zv(>6000Â) —► N 0 2 + M (M = gas solvent) Light emission results when electronically excited NO5 molecules revert to their ground state.

Kellershohn, J. Nucl. M ed. 9, 110 (1968). K. Boddy, R. M. Harden and W. D. Alexander, J. Clin. Endocrinol. Metab. 28, 294 (1964). B. Carlmark and P. Reizenstein, in reference 5, p 113. H. E. Palmer and W. B. Nelp, in reference 5, p 127. G. J. Peterson, in Nuclear Activation Techniques in the Life Sciences, p 323. IAEA: Vienna (1972). J. S. Orr and F. C. Gillespie, Science, 162, 138 (1969). F. C. Gillespie, J. Shimmins and J. M. A. Lenihan, Radiochem. Radioanal. Letters, 4,43 (1970). B. Maziere, M.

The air drawn through a filter paper leaves on it a dark stain. The darkness of the stain is interpreted as a surface concentration of particulate matter, and by means of a calibration curve obtained with a standard smoke the volume concentration is calculated. These procedures supply only the concentration of particulate matter; both the inorganic and the organic fractions have to be analysed for the determination of those species which have a specific impact on human health12. FLUORIDE Among pollutants arising from industrial sources it is worth mentioning the development of automatic continuous analysers to monitor fluorides.

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