Abstract
Micro column of activated alumina was used in Flow Injection coupled with Flame Atomic Absorption and Direct Current Plasma Atomic Emission Spectrometry (DCPAES), for the determination of Cr+3 and Cr+6 in samples of groundwater used for drinking purposes, from different localities, and dust samples from elementary schools of west of Tripoli area. Atomic signals for both species Cr+3 and Cr+6 were analyzed by (FIFAAS) with limited detection of 0.03 µg/ml, while in DCPAES it was 0.003 µg/ml and 0.002 µg/ml for Cr+3 and Cr+6 respectively. Concentration data obtained for potable water for Cr+3 and Cr+6 were found less than the detection limit of both instruments, and concentration data of dust samples for Cr+3 was in the range of 0.9 - 1.5 µg/ml whereas Cr+6 was less than 0.05 µg/ml when analyses by DCPAES were used. The results obtained provided evidence that water samples collected from the above mentioned sources were free from any presence of chromium metal.