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A simple, selective and sensitive derivative spectrophotometric method is proposed for the simultaneous determination of gallium(III) and indium(III) in mixtures using 1-(2-pyridylazo)-2-naphthol in cationic micellar medium, without any prior separation. Beer's law is obeyed between 2.80x10 -1 -3.63 and 4.60x10 -1 -9.20 μg ml -1 concentration of Ga(III) and In(III)...
A sensitive derivative spectrophotometric method using 1-nitroso-2-naphthol has been developed for determination of trace amounts of cobalt in the presence of a neutral surfactant. Photometric parameters, viz., λ max , molar absorption coefficient and analytical sensitivity of the complex formed in micellar media are 420 nm, 3.18×10 4 l mol −1 cm −1 and 2.05 ng ml ...
A rapid and sensitive method for the trace level determination of beryllium based on the formation of a 1:2 complex (λ max 560 nm) with 1,4-dihydroxy-9,10-anthracenedione in an aqueous medium containing Triton X-100 is reported. Beer’s law is followed in the range 3.60–360 ng ml −1 of Be(II). The molar absorptivity and Sandell’s sensitivity are 1.68×10 4 l mol −1 cm...
A photometric method for trace analysis of Cu(II) with 1-(2-pyridylazo)-2-naphthol (PAN) in presence of a neutral surfactant, Triton X-100, has been reported in normal and derivative modes. The molar absorption coefficient (ε) and Sandell's sensitivity (S) of PAN-Cu(II) complex at 555 nm is 5.21 10 4 1 mol -1 cm -1 and 1.22 ng cm -2 respectively....
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