Use of fluidizing bed aerosol generators to stablish a dust mixture of two substances at a fixed ratio for inhalation toxicity studies

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      <subfield code="a">Use of fluidizing bed aerosol generators to stablish a dust mixture of two substances at a fixed ratio for inhalation toxicity studies</subfield>
      <subfield code="c">R.N. Shiotsuka... [et al.]</subfield>
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      <subfield code="a">A method was developed to use two fluidizing bed generators to deliver a mixture of 1 mg cobalt + 15 mg tungsten carbide/m3 to an inhalation exposure chamber with the output from the cobalt generator split to provide the same cobalt concentration to a cobalt-only chamber. To provide a more uniform delivery of material and to minimize the amount of starting dust needed, a subsystem that produced time bursts of compressed air was used to prevent the accumulation fo dust along the aerosol transport tubes. The addition of an electrostatic precipitator placed in the exhaust lines reduced the amount of dust delivered to the high-efficiency particulate air filters, thereby reducing the number of filter changes</subfield>
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      <subfield code="a">Shiotsuka, R.N.</subfield>
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      <subfield code="a">American Industrial Hygiene Association journal</subfield>
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      <subfield code="t">American Industrial Hygiene Association journal</subfield>
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      <subfield code="g">Vol. 53, nº 8, August 1992 ; p. 510-513</subfield>
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