Systematic Errors in the Determination of Trace Metals by GFAAS Technique,Part I

摘要

The behaviour of solutions containing 7 metals in trace range (pH=2) prepared in borosilicate glass and polyethylene containers and transferred into commerical polyethylene-polypropylene and homemade quartz autosampler cups for measurements were studied using graphite furnace atomic absorption spectrometry.The different interactions between metal solution and vessel material were observed for the metals studied.The most significant losses of chromium and nickel occurred on a polyethylene surface,while the highest absorbance signals were registered from quartz containers.Higher absorbance signals from quartz containers were also obtained for cadmium and copper solutions.Contrary to these results,the absorbance signals for lead solutions were lowest when measured form quartz vessels.The container material had no influence on the analytical signals of cobalt and manganese.