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Updated: Jun 28, 2026

A Colorimetric Method for Measuring Iron Content in Plants
Published on: September 7, 2018
Direct spectrophotometric determination of iron in non-ferrous alloys
Z Nan1, G Yuan-Xiang, G Y Qing
1Shanghai Research Institute of Materials, SCMI, Shanghai, People's Republic of China.
Abstract:
Disodium 3-(2-pyridyl)-1,2,4-triazine-5,6-di(4'-phenylsulphonate) is used for determination of iron in metal analysis. High selectivity is achieved by using a ligand buffer and substoichiometric masking. Interference from 0.9 mg of Cu(II) can be completely eliminated by combined reduction and masking with ascorbic acid and thiosemicarbazide. Beer's law is obeyed over the range 0.4-1.6 mug/ml iron in the final solution, with a standard deviation of 0.02 mug/ml. The method has been successfully applied to determination of iron (without preseparation) in a number of non-ferrous metals and alloys, with a coefficient of variation of 1.2-5.0%.
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