A modified spectrophotometric method for determining sulfate with 2-aminoperimidine

A simplified procedure is described in which the 2-perimidinylammonium sulfate is collected on a teflon filter and then dissolved with concentrated nitric acid. The yellow solution obtained is made alkaline and the absorbance of the resulting violet solution is measured at 550 nm. The calibration gr...

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Published in:Analytica chimica acta 1982, Vol.136, p.435-438
Main Authors: Suzuki, Kin-Ya, Ohzeki, Kunio, Kambara, Tomihito
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Language:English
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container_title Analytica chimica acta
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creator Suzuki, Kin-Ya
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description A simplified procedure is described in which the 2-perimidinylammonium sulfate is collected on a teflon filter and then dissolved with concentrated nitric acid. The yellow solution obtained is made alkaline and the absorbance of the resulting violet solution is measured at 550 nm. The calibration graph is linear over the range 10–50 μg of sulfate for 5-ml samples (r.s.d. ⩽ 2.9%). Interference levels from phosphate and carbonate are reported and the method is applied to well water and fresh snow.
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title A modified spectrophotometric method for determining sulfate with 2-aminoperimidine
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