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Document ID (ISN)42907
CIS number 84-1888
ISBN(s) 91-7464-157-3
Year 1983
Convention or series no. Arbete och hälsa 1983:3
Author(s) Olander L.
Title Measurement of air turnover rates - A comparison of different instruments and gases
Original title Luftomsättningsmätning - En jämförelse mellan olika instrument och gaser [in Swedish]
Bibliographic information Arbetarskyddsstyrelsen, Publikationsservice, 171 84 Solna, Sweden, 1983. 38p. Illus. 34 ref.
Abstract A comparison between instruments used for measurements of air change rates with the tracer gases nitrous oxide (N2O) and sulfur hexafluoride (SF6). Air change rates were 2.5-20 per hour and the concentrations of the tracer gases were 700ppm-3ppm for N2O and 2200ppb-2ppb for SF6. Both gases can be used for measurements in workrooms with the given air change rates. Continuous measurements of either gas can be done with infrared spectrometers in the intervals 10ppm-1000ppm and 10ppb-1000ppb, respectively. Lower concentrations of SF6 can be measured using a gas chromatograph with an electron capture detector, but continuous measurements are not possible. Leak detectors, which in principle are simplified gas chromatographs, are not usable for quantitative measurements.
Descriptors (primary) infrared spectrophotometry; nitrous oxide; sulfur hexafluoride; gas chromatography; air exchange rate
Descriptors (secondary) evaluation of equipment
Document type E - Books, reports, proceedings
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Ventilation
Halogens and their inorganic compounds
Inorganic substances