Summary
Zinc is selectively extracted with N-hydroxy-N,N′-diphenylbenzamidine and spectrophotometrically determined with 4-(2-pyridylazo)resorcinol. The molar absorptivity is 9.4×104l·mol−1 cm−1. Relative standard deviation is ±1.5%.
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Chakravarty, S., Mishra, R.K. Spectrophotometric determination of zinc at trace level in environmental samples. Fresenius J Anal Chem 345, 613–614 (1993). https://doi.org/10.1007/BF00325811
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DOI: https://doi.org/10.1007/BF00325811