Diacetylmonoxime-3-amino-4-hydroxy benzoyl hydrazone (DMAHBH) is used as a novel chromogenic organic reagent for the determination of Cadmium (II) with spectrophotometer. The novel chromogenic organic reagent − diacetylmonoxime-3-amino-4-hydroxy benzoyl hydrazone (DMAHBH) gave yellow colored water soluble complex with Cd (II) in buffer (pH = 8.0−9.0) medium. The color complex shows maximum absorbance at λ = 378 nm. The system obeyed Beer's law in the concentration range of 0.5035−5.0535 µg/ml. The optimum Cadmium (II) concentration range for accurate determination as evaluated from Ringbom plot was 0.5035−5.0535 µg/ml. The molar absorptivity and Sandell's sensitivity were 2.94 . 10 4 l . mol -1. cm -1 and 0.0036 µg/cm 2 respectively. Cadmium (II) forms M:L (I:I) color complex with DMAHBH and stability constant of the complex was found to be 8.58 . 10 7 . Soil samples were analyzed for the determination of Cadmium (II) present, using the proposed method. This developed method was applied for the determination of Cadmium (II) in soil and cigarette samples and good analytical results.
4-hydroxy-3,5-dimethoxy benzaldehyde-4-hydroxy benzoyl hydrazone (HDMBHBH) is used as a novel chromogenic organic reagent for the determination of Lead (II) using spectrophotometry. The novel chromogenic organic reagent 4-hydroxy-3,5-dimethoxy benzaldehyde-4-hydroxy benzoyl hydrazone (HDMBHBH) gave yellow coloured water soluble complex with Pb (II) in basic buffer (pH = 10.0) medium. The colour complex shows maximum absorbance at 386 nm. The system obeyed beer's law in the concentration range of 0.518-5.18g/ml. The optimum Lead (II) concentration range for accurate determination as evaluated from Ringbom plot was 1.036-4.662 g/ml. The molar absorptivity and Sandell's sensitivity were 2.6610 4 L . mol -1. cm -1 and 0.0077 g/cm 2 respectively. The Lead (II) forms I:I colour complex with HDMBHBH and stability constant of the complex was found to be 3.4210 6 . The present developed method was successfully applied for the determination of Lead (II) in biological samples.
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