2025/04/30 by Tschickardt, Michael, Krämer, Wilhelm, Schmitt, Ralf +4
#543 Analytical chemistry #543 Analytische Chemie #571.95 Toxicology #571.95 Toxikologie #616.9803 Betriebs- und Arbeitsmedizin #616.9803 Industrial and occupational medicine #Analysenmethode #Arbeitsplatzmessung #Benzalin #Bestimmungsgrenze #Dampf-Aerosol-Gemisch #GGP mini #GGP-Mini #Gefahrstoff #Luft #Luftanalysen #Messbereich #Mirbane oil #Mirbanessenz #Mirbanöl #Mononitrobenzene #Mononitrobenzol #Nitrobenzen #Nitrobenzene #Nitrobenzol #Probenahme #Präzision #Quarzfaserfilter #Selektivität #TD-GC-FID/MS #Tenax TA #Thermodesorptions-Gaschromatographie mit Flammenionisationsdetektion und Massenspektrometrie #Wiederfindung #air #air analyses #analytical method #einatembare Partikelfraktion #external calibration #externe Kalibrierung #hazardous substance #inhalable particle fraction #limit of quantification #measurement range #precision #quartz fibre filter #recovery #sampling #selectivity #thermal desorption gas chromatography with flame ionisation detection and mass spectrometry #vapour-aerosol mixture #workplace measurement
paper · doi:10.34865/am9895e2019_w
This analytical method is a validated measurement procedure for the determination of nitrobenzene [98‐95‐3] in workplace air in a concentration range of one tenth up to twice the currently valid OEL or MAK value of 0.51 mg/m3. With this method simultaneously airborne nitrobenzene in the gaseous state as well as particles are collected. Sampling is performed by drawing a defined volume of air through a quartz fibre filter located in the sampling head GGP‐Mini with an adsorption tube filled with Tenax TA connected downstream using a suitable pump. The flow rate is set to 0.066 L/min with a recommended air sample volume of approx. 4 litres. The collected nitrobenzene is thermally desorbed and then analysed by means of gas chromatography using two detectors, a FID for quantification and a MSD to recognise potential interferences. The quantitative determination is based on a calibration function obtained by means of a multi‐point calibration. The limit of quantification is 0.0085 mg/m3 based on an air sample of 4 litres.