A New sampling technique that allows quantitative fit testing by using the employee's own respirator

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      <subfield code="a">A new, in mask sampling technique has been developed that enhances current quantitative respirator fit test methods. This new sampling technique eliminates the need for a permanently modified respirator for conducting fit tests. With this new technique, a sample was drawn from the breathing zone inside the respirator by means of a sampling adapter, which was temporarily attached between one of the air purifying filters and the facepiece before a fit test was performed</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 12, December 1992 ; p. 776-779</subfield>
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