title: A simple spectrophotometric method for the determination of trace levels of molybdenum using N,N'-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane.
abstract: The present work describes a selective, rapid and economical spectrophotometric method for the determination of molybdenum using N,N'-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane. Molybdenum(VI) reacts with N,N'-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane to form a stable 1:1 yellow complex with an absorption maximum at 342 nm. The reaction is completed within 10 min and the absorbance of the molybdenum complex remains stable for at least 1 week at room temperature. The effective molar absorption coefficient at 342 nm was 9.6 × 10(3)L mol(-1)cm(-1). Under optimal conditions, the complex obeys Beer's law from 0 to 9.9 μg mL(-1). The relative standard deviation was 0.08% (for 11 samples, each containing 6 μg mL(-1) molybdenum). Under the optimum conditions, the detection limit (3σ) was 17.7 μg L(-1) for molybdenum without any preconcentration. The precision was determined from 30 results obtained for 4.80 μg mL(-1) Mo(VI); the mean value of a molybdenum(VI) was 4.83 μg ml(-1) with a standard derivation of 0.002 μg ml(-1) molybdenum(VI).
authors.affiliation: Department of Chemistry, Art and Science Faculty, Balıkesir University, 10100 Balıkesir, Turkey. Electronic address: dkara@balikesir.edu.tr.
authors.forename: Derya
authors.initials: D
authors.lastname: Kara
authors.affiliation: Department of Chemistry, Art and Science Faculty, Balıkesir University, 10100 Balıkesir, Turkey.
authors.forename: Cennet
authors.initials: C
authors.lastname: Karadaş
mesh_terms: D001593:Benzyl Compounds / Q000737:chemistry*; D003959:Diamines / Q000737:chemistry*; D054879:Halogenation; D057230:Limit of Detection; D008982:Molybdenum / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D001593:Benzyl Compounds; D003959:Diamines; C070006:1,2-diaminopropane; D008982:Molybdenum
keywords: Molybdenum; N,N′-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane; Spectrophotometry