Abstract
Synthesized 1-picolinoylthiosemicarbazide was found to have a sensitive reaction with iron(III) to give a water-soluble yellow complex in weakly acidic media.
Investigations on its application as an analytical reagent showed that the complex had two absorption maxima at 405 mμ and 650 mμ.
The estimation of 0.55 ppm iron (III) was possible by use of the more sensitive 405 mμ. The composition of the complex was determined by the continuous variation method and by the molar ratio method to be 1:2 for iron(III): reagent.
