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Decreased sensitivity of photoionization detector total organic vapor detectors in the presence of methane

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      <subfield code="a">Decreased sensitivity of photoionization detector total organic vapor detectors in the presence of methane</subfield>
      <subfield code="c">Jonathan E. Nyquist... [et al.]</subfield>
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      <subfield code="a">The reduction in sensitivity of the photovac TIP, TIP-1, and the H-NU101 total organic vapor analyzers equipped with potoionization detectors (PID) to toluene and gasoline in the presence of methane was examined. The results showed an exponential decrease in detector sensitivity, with a reduction of about 30% for 0.5% methane and 90% for 5% methane</subfield>
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      <subfield code="a">Contaminantes químicos</subfield>
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    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080541705</subfield>
      <subfield code="a">Metano</subfield>
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    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080583163</subfield>
      <subfield code="a">Vapores orgánicos</subfield>
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    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080545574</subfield>
      <subfield code="a">Tolueno</subfield>
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      <subfield code="0">MAPA20080547417</subfield>
      <subfield code="a">Gasolina</subfield>
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      <subfield code="0">MAPA20080590338</subfield>
      <subfield code="a">Detectores de gases</subfield>
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      <subfield code="a">Nyquist, Jonathan E.</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>
      <subfield code="d">Akron, Ohio</subfield>
      <subfield code="g">Vol. 51, nº 6, June 1990 ; p. 326-330</subfield>
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