Ficus (FIC) leaf extract used as corrosion inhibitor for carbon steel alloy (C.S) in two corrosive environments (saline and acidic) with four concentrations (1, 2, 3 and 4 ppm) at varied temperature range between (298-328 K) using electrochemical polarization measurements. The importance of this work focused on the use the green chemistry that is far from the chemical materials effect. The results of polarization presented the FIC inhibitor consider a mixed type (anodic and cathodic) inhibitor. Tafel curve used to evaluate the corrosion inhibition activity. In a saline medium, the best inhibitor efficiency reaches to (87%) in 2 ppm and IE% reach to (99%) for HCl medium inhibited by 1ppm. Langmuir isotherm obeys the study by thermodynamic parameters and confirms the physical adsorption.

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The azo reagent 3- (4-N-Pyridine -2-yl benzene sulfonamide azo)-1-nitroso naphthol was synthesized and characterized by FT-IR, 1H-NMR and 13CNMR spectral techniques. The solvatochromism of the azo compound was studied by using different solvents. Spectrophotometric determination of cobalt (II) is based on the formation of a 2:1 complex with above reagent. The complex has λmax at (452) nm and Ԑmax of (2. 0567*104) L. mol-1. cm-1.A linear correlation (0.1- 3.5μg. ml-1) was found between absorbance at λmax and concentration. The effect of diverse ions on the determination of cobalt (II) to investigate the selectivity of the method were also studied. The stability constant of the product was (2. 68*108). The proposed method was successfully applied to the analysis of honey sample.

I S S N 2 3 2 1 -8 0 7 X V o l u m e 1 2 N u m b e r 7 J o u r n a l o f A d v a n c e s i n C h e m i s t r y 4243 | P a g e c o u n c i l f o r I n n o v a t i v e R e s e a r c h A u g u s t 2 0 1 6 w w w . Abstract ;The azo reagent 3-((benzothiazol-2-diazenylnaphthalene-2,7-diol] was synthesized and characterized by FT-IR , 1 H-NMR and 13 CNMR spectral techniques. The electrochemical behavior of the azo reagent and its complex with Cu (II) has been studied at glassy carbon disk GCE electrode in different supporting electrolyte at concentration (1M) and scan rate (100mv.s -1 ). Spectrophotometric determination of copper (II ) is based on the formation of a 2:1 complex with above reagent. The complex has λmax at(588) nm and Ԑmax of( 1.436x10 4) L.mol -1 .cm -1 .A linear correlation (0.1 -3.0 μg. ml -1 ) was found between absorbance at λmax and concentration . The effect of diverse ions on the determination of copper (II) to investigate the selectivity of the method were also studied . The stability constant of the product was (1.1x10 8 ) . The proposed method was successfully applied to the analysis of honey sample . m