The HSE/NPL phase-contrast test slide
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<title>HSE/NPL phase-contrast test slide</title>
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<title>The Annals of occupational hygiene</title>
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<namePart>Le Guen, Jean M.M.</namePart>
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<dateIssued encoding="marc">1984</dateIssued>
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<abstract displayLabel="Summary">The slide provides a means of checking the detection limit of phase-contrast microscopes and is intented primarly for use with the membrane filter method of measuring airborne asbestos fibres. The test objects on the Mark II version (HSE/NPL), which is commercially available, are sets of ridges of resin, mounted on a conventional microscope slide, and immersed in a second resin of slightly lower refractive index</abstract>
<note type="statement of responsibility">J.M.M. Le Guen... [et al.]</note>
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<text>nº 2, 1984 ; p. 237-247</text>
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