Spectrophotometric and AAS determination of trace amounts of cobalt after preconcentration by using alpha-benzilmonoxime-microcrystalline naphthalene.
The formed cobalt-a-benzilmonoxime complex was adsorbed onto microcrystalline naphthalene. Then it was determined by zero and first derivative spectrophotometry and by atomic absorption spectrophotometry (AAS) after dissolving into chloroform and methylisobutylketone (MIBK), respectively. Under optimum conditions, cobalt in the range of 1.0 - 20.0, 0.4 - 30.0 and 2.5 - 50.0 microg could be determined by spectrophotometry, first derivative spectrophotometry and AAS method, respectively. By the method, a preconcentration factor equal to approximately 30 for cobalt was obtained. The effect of diverse ions on the determination of 5.0 microg cobalt was also studied. The method was successfully applied to some pharmaceuticals and synthetic alloy samples.
Eskandari
Habibollah
H
Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardebili, Ardebil 179, Iran. Habibollah-Eskandari@uma.irost.net
Karkaragh
Gholam Hassan Imanzadeh
GH
Saghseloo
Ali Ghanbari
AG
Dehaghi
Ghadamali Bagherian
GB
D001593:Benzyl Compounds / Q000737:chemistry*; D003035:Cobalt / Q000032:analysis* / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D009281:Naphthalenes / Q000737:chemistry*; D009942:Organometallic Compounds / Q000032:analysis* / Q000737:chemistry; D010091:Oximes / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D013054:Spectrophotometry, Atomic / Q000379:methods*
D001593:Benzyl Compounds; D007477:Ions; D009281:Naphthalenes; D009942:Organometallic Compounds; D010091:Oximes; C484409:alpha-benzilmonoxime; D003035:Cobalt