Salvia officinalis L. is a Mediterranean species, naturalized in many countries. The composition of essential oil isolated from Salvia officinalis L, wild growing in Libya, was analyzed. In this study, essential oils from fresh and dry leaves of Salvia officinalis L, Libya, were extracted with ethanol, hexane or chloroform as solvents using Soxhlet apparatus and the extracts were analyzed using gas chromatography/mass spectrometry method. Each solvent showed differences in the extraction yields between fresh and dry leaves. Physical constants of the extracts were shown variation in color, viscosity, density, PH and percentage of production between fresh and dry leaves for each solvent. GC-MS results showed that ethanol could extract the most compounds compared to hexane and chloroform from both fresh and dry leaves. In total 41, 28 and 31 compounds were identified in the essential oils of fresh and dry leaves of Salvia officinalis L using ethanol, hexane or chloroform respectively. For each solvent the number of compounds extracted from dry leaves was bigger than the number extracted from fresh leaves. arabic 33 English 104
ABUBAKER A BASHIR ATRROG, abdunnaser mohamed mohamed megrahi, Fathia Mousa H Altalhi(4-2018)

– Iron oxide nanoparticles (IONPs) can play a significant role in the removal of heavy metal from contaminated solution .Aresnite ,As(III) highly toxic,mobile and predominant species in arsenic contaminated water IONPs have been synthesized, characterized and tested for the removal of As(III) from arsenic contaminated water. In this work , we synthesized IONPs using a chemical method involving dispersion of Fe3+ ions through polymer molecules of poly vinyl alcohol (PVA) in aqueous medium X-ray diffraction (XRD) analysis confirmed the formation of a single phase rhomobohrdral crystal structure, the size of nanoparticles was 50-100 nm. Transmission electron microscopic images corborate the result of IONPs (50-100 nm) . The adsorption of As(III),Hg(II) and Cd(II) On (IONPs) was studied using four parameters contact time, concentration, dose of IONPs and pH Adsorption equilibrium was achieved in 100 min and maximum removal of As(III) was obtained at pH (6-6.5) . The isotherm analysis indicated that the adsorption data better filted to the Langmuir isotherm model. The maximum adsorption capacities were 101.2, 73.10 and 60.05 mg g_1 for As(III), Hg(II) and Cd(II), respectively.
ezuldeen mohammed abraheem aboushalloua(9-2021)

يساعد الكتاب في فهم ألاسس العملية للكيمياء التحليلية بطريقة سهلة الفهم والاستيعاب arabic 57 English 0
د رجب علي المختار عيسي(1-2019)