Determination of Arsenic and Lead in Polypropylene Tow Binder by Direct Injection GF-AAS

A direct injection-graphite furnace atomic absorption spectrometry (GF-AAS) method for determining arsenic (As) and lead (Pb) in polypropylene tow binder was developed. The results showed that, twentyfold dilution and additional drying process at 120℃ effectively avoided sample blasting while boiling in the furnace and improved analysis precision. The recoveries of As and Pb ranged from 93.5% to 104.0% and 94.0% to 105.3%, respectively, with the relative standard deviations (RSD) of <5%. The limit of detection of As and Pb was 0.537 and 0.567 μg/L, respectively. This method is suitable for determining As and Pb in polypropylene tow binders of water emulsion.