A Rapid and Simple Spectrophotometric Determination of Traces of Chromium (VI) in Waste Water Samples and in Soil samples by using 2-Hydroxy, 3-Methoxy Benzaldehyde Thiosemicarbazone (HMBATSC)
A rapid and simple Spectrophotmetric method has been developed for the determination of microgram amount of Chromium (VI) in aqueous dimethyl formamide (DMF). Chromium (VI) forms a yellowish green coloured M:L complex with 2-hydroxy-3-methoxy benzaldehyde thiosemicarbazone in the acidic buffer medium (pH=6.0) at room temperature. The complex shows maximum absorption at 385nm. Beer's law is obeyed in the range 0.260 to 2.60 
Spectrophotometric determination of iron in trace amount using 5-bromo-salicylaldehyde thiosemicarbazone
A simple, sensitive and specific spectrophotometric method has been developed for the determination of iron(II) in aqueous dimethylformamide (DMF). The metal ion reacts with 5-bromosalicylaldehyde thiosemicarbazone (5-BSAT) forming a green coloured complex in the pH range 5.0-6.0. The complex shows maximum absorption at 385 nm. Beer's law is obeyed in the range 0.28-5.60 μg/ml. The molar absorptivity and Sandell's sensitivity are found to be 1.72×10 4 1 mot - 1 cm - 1 and 0.032 pg cm - 2, respectively. The method has been employed successfully for the determination of Fe(II) in grape leaves, multivitamin capsules and human blood.
Analytical properties of 2-oximinodimedone dithiosemicarbazone.
The synthesis and analytical properties of 2-oximinodimedone dithiosemicarbazone are described.