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The activities funded under the present EPA/ERDA interagency agreement have been concentrated mainly in two areas. An elemental sulfur monitor for the measurement of fine particulates has been designed, constructed, and is currently being tested. A prototype of the device will be delivered in the near future. A second program has involved the development of the ..beta..-attenuation technique for the large-scale measurement of the masses of particulate deposits. The emphasis has been primarily concerned with the fabrication of improved hardware to perform the measurement conveniently and accurately. Other activities included consultation with EPA on questions concerning air sampling techniques and X-ray fluorescence analysis of aerosol samples. An additional long-term interest has been the development of X-ray techniques which are capable of determining the chemical form of the sulfur atoms in an environmental sample. Since these latter activities are in a more speculative period of development, the present progress report emphasizes the activities in the area of elemental sulfur monitoring and ..beta..-gauge development.

Elemental sulfur analysis using x-ray techniques and. beta. -gauge mass measurements