This study was conducted to estimate the concentration of potassium bromate (KBrO3) in 21 samples of pastries and biscuits, and the absorption of samples was measured using a (Uv-Vis spectrophotometer). The results of this research showed that the amount of potassium bromate in the samples varies according to the sample, and the highest concentration was for the sample of Major Biscuits(567.5ppm). The lowest concentration was for 44 ppm mleeha cake sample. We conclude the use of an internationally banned carcinogen and prohibited by Libyan laws, as this study revealed the presence of high concentrations of it in the tested samples.
ABUBAKER A BASHIR ATRROG(12-2021)

In this study the quality of ground water in the city of Janzour ± Libya was studied. 27 samples of well water were collected with depths ranging between 18 - 160 m covered most areas in the city and some of their chemical properties including pH, electrical conductivity, total dissolved salts, and the concentration of nitrate, sulfate, sodium, potassium and calcium ions were determined and compared with the Libyan National Center for Standardization and Metrology. The results showed that the most samples did not exceed the maximum limit according to Libyan and world standard except W6 (Alirifi Asharif school) and W10 (Abd Aljalil Alirifi farm) which have high concentration of Sodium (200mg/l). Also noted that the amount of total dissolved salts is 50% of the samples were less than 100 mg/l which is the minimum amount according to the Libyan sta ndard.
خالد الصغير عمر حريبة(1-2018)

In this study, six residents of Zawia City who had no history record of occupational lead exposure were investigated. One sample of venous blood was collected from each. Sample preparation consisted of a simple dilution (twenty-fold) with 0.15N HNO3. The was centrifuged to separate serum, which was then isolated and analyzed for lead content by Flame Atomic Absorption Spectroscopy (FAAS). The residue of the sample was also analyzed by the same technique for blood level. The blood lead level in the residue was higher than that in serum lead level. Mean lead concentrations were 4.48mg/L in serum and 60.23 mg/L in residual blood respectively. Blood lead level was quietly correlated with serum lead and accounted for 95% of the variability of serum lead concentration. The bivariate regression coefficient of serum lead was 0.221 (p. 0.001). In a multivariate regression model of serum lead levels that include blood and serum lead level remained an independent predictor of lead plasma level (p. 0.007, p
Ragiab Ali Mokhtar Issa(2-2018)