Comparative determination of lead concentrations in the air of the working environment by x-ray fluorescence spectroscopy and the spectrophotometric method

Abstract

Za određivanje koncentracije olova u vazduhu u autoservisnoj radionici -Autovojvodina- u Novom Sadu primijenjene su metode rendgenske fluorescentne spektroskopije i spektrofotometrije. Rendgenski fluorescentni spektrometar baždaren je apliciranjem poznatih koncentracija Pb(N03)i na filter-papir. Vazduh je uzorkovan filtracijom poznatog volumena kroz filter-papir. Nađena koncentracija olova u vazduhu bila je ispod maksimalne dozvoljene koncentracije. U radu su izneseni i rezultati dobiveni spektrofotometrijskom metodom te su nađene razlike od 10 do 30% u odnosu na rezultate dobivene rendgenskom fluorescentnom spektroskopijom.The x-ray fluorescence spectroscopy and the spectrophotometric method were used to determine lead concentrations in the air of an auto repair shop. The calibration of the x-ray spectrometer was performed with known concentrations of water solutions of Pb(N03), on filter paper. Samples were prepared by filtration of measured volumes of air. The lead amounts determined were below the maximum permissible concentrations. The results obtained with the spectrophotometric method are also given showing discrepancies between 10 and 30 per cent if compared with the results of x-ray fluorescence spectroscopy