Departmental Bulletin Paper Determination of Dissolved Iron in Seta River Water by Spectrophotometry using the Colored Complex of Ferrozine and Iron(II) and Graphite Furnace Atomic Absorption Spectrometry

原, 博一  ,  上野, 智子  ,  小林, 悠樹  ,  森山, さより  ,  西岡, 宏美

(64)  , pp.105 - 120 , 2015-03-31 , 滋賀大学教育学部
The dissolved reactive iron(II) and iron(III) in the Seta River water were separately determinedby flow-injection spectrophotometry of the colored complex of ferrozine and iron(II). The reactiveiron(III) was determined after their reduction by a reducing agent, hydroxylamine hydrochloride.The sample volume needed for one determination was only 1mL and the determination can be donewithout any concentration procedure. The determination was done using two different buffersolutions of pH5.0 and 7.5 for comparison. The dissolved total iron was also spectrophotometricallydetermined after digestion by a mixture of hydrofluoric acid and nitric acid. The results werecompared to those obtained from graphite furnace atomic absorption spectrometry (GFAAS). Theconcentration change in the dissolved iron in the Seta River water over one year was reported.The concentration of dissolved reactive iron was very low compared to that of dissolved total iron.The concentration of dissolved iron(III) measured using the pH7.5 buffer was lower than that measured using the pH5.0 buffer.

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