Determination of titanium dioxide in the air of workplace by inductivehy coupled plasma optical emission spectrometry / 中华劳动卫生职业病杂志

ABSTRACT

Objective@#To establish the method for determination of titanium dioxide in the air of workplace by inductivehy coupled plasma optical emission spectrometry (ICP-OES) .@*Methods@#The titanium dioxide was collected by filter membrane and then digested by microwave digestion apparatus in the mixed solvents (HNO3∶HF∶H2O=4∶1∶1) , dilutedto 25 ml and detected by ICP-OES.@*Results@#The sampling efficiency was higher than 95%; the linearity of ICP-OES was good at the range of 10-500 μg/ml, the minimum quantitation concentration was 0.72 mg/m3 (as collecting 150 L air sample) , the maximum quantitation concentration was 21.7 mg/m3 (as collecting 960 L air sample) , the recovery was ranged from 99.0%-102.0%, the RSD of intra- and inter-batch precision were 0.5%-3.2% and 1.7%-3.5%, respectively.@*Conclusion@#The sampling method and determination method meet the requirements of guide for establishing occupational health standards-part 4 determinatin methods of air chemicals in workplace (GBZ/T 210.4-2008) , and areapplys to the collection and determination of TiO2 in the air of workplace.