Abstract
A Baseline blood concentration of metals is an important indication of observing metals exposure in environmental and occupational settings. On this regard, a study was conducted on 116 men and 84 women 20-65 years of age in Libya. Its aim was to determine the blood plasma levels of manganese for those who live in the inner city of Tripoli. Blood plasma samples were extracted from 200 participants between April and July 2013. Manganese levels in blood plasma were determined using Graphite Furnace Atomic Absorption Spectrometry (GFAAS). There was significant age-related correlation in blood plasma levels of manganese which correlated positively with age (P for trend = 0.05). The mean (SD) of manganese was 2.14 μg/l (0.37) with a peak value reached 3.02 μg/l.