Development of absorption spectrophotometry of iron(III) in environmental water and sediments using NEDA and its application to the field.

In this study, we developed a simple method that enables iron(III) in environmental water to be directly determined via spectrophotometry. In water samples, iron(III) formed a yellowish complex with N-1-Naphthylethylenediamine dihydrochloride (NEDA) at pH 2.0-2.

Sensitive Gas Chromatography Detection of Nanomolar Hydroxylamine in Environmental Water by Fe(III) Oxidation.

Nanomolar concentrations of NHOH in natural water sources were determined using an Fe oxidation method. A pH of 2.35 - 2.