Determination and occurrence of phosphororganic compounds (POV) in dust and indoor air

The available work presents a study about the determination of Tris- (2-chl oroethyl)phosphate (TCEP), Tris- (2-butoxyethyl)phosphate (TBEP), p-Tricres ylphosphate (p-TKP) and Triphenylphosphate (TPP) in house dust and indoor a ir. Usual extraction solvents for the sample preparation of well known indo or pollutants can not be used for the determination of phosphororganic comp ounds (POV). For example the extraction with cyclohexane-acetone-solvent ca uses serious problems with recovery rates and blind values resulting from i rreversible adsorption. Methylene chloride (DCM) as extraction solvent can prevent the mentioned problems. It must be differentiated between normal fl ats and public buildings like schools. The TCEP concentration in dust from 24 of 31 flats is below 5 mg/kg, the maximum is 44 mg/kg, the indoor air sh ows TCEP concentration between < 0.01 and 0.03 <mu>g/m(3). In dust collecte d in schools TCEP concentrations up to 2200 mg/kg are detectable and the TC EP concentration in indoor air of these schools is about 4 mug/m(3). Also T BEP and TPP can be found in school dust. The measured concentration range f rom 100 up to 1300 mg/kg. For the assessments of risks in respect to POV in dust and indoor air it should be differentiated between semivolatile POV l ike TCEP and particle bound POV like TBEP and TPP.