SPECTROPHOTOMETRIC DETERMINATION OF MOLYBDENUM IN ENVIRONMENTAL AND FOOD SAMPLES USING SOLVENT EXTRACTIONAbstract
2, 6-dithiol-4-methylphenol (DTMP) is proposed as an analytical reagent for the extractive spectrophotometric determination of molybdenum (V). DTMP in the presence 2, 6- bis (N, N-dimethylaminomethyl)-4-methylphenol (AP) forms red colored complex with molybdenum (V) in the pH range 4.8 – 5.8. The Beer’s law was applicable in the range 0.4-22μg mL−1. The dark red Mo-DTMP-AP complex shows a maximum absorbance at 525 nm, with molar absorptivity of 5.21× 104 dm3 mol−1 cm−1 and Sandell’s sensitivity of the complex obtained from Beer’s data is 1.84 ng cm-2. The composition of the Mo (V)-DTMP-AP complex is found to be 1:2:1 (Mo: DTMP: AP). The interference of various cations and anions in the method were studied. The results of the prescribed procedure applied for the determination of the micro amounts of Mo (V) in plant, water and soil samples are presented.
K. A. Kuliev *, N. A. Verdizadeh, G. S. Suleymanova, R. A. Mamedova and S. A. Mamedova
Department of Analytical Chemistry, Azerbaijan State Pedagogical University, U. Gadjibekov Street 68 Baku, AZ 1000, Azerbaijan.
15 February, 2017
14 April, 2017
26 April, 2017
01 September, 2017