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Spectrophotometry determination of cobalt in spherical nickel hydroxide

Yan Gao-hua

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Abstract

The chromogenic reaction between the reagent picramazochrom and cobalt was studied.In medium,cobalt reacted with the reagent to form a green complex which exhibited an absorption maximum at 650 nm with a apparent molar absorptivity of 2.7×104 L/mol.cm.Beer's law was obeyed in the range of 0~50 μg/25 mL for cobalt.The proposed method was applied to determine cobalt directly in spherical nickel hydroxide of the RSD(n=5) between 0.8% and 1.6%,and the recovery was 99%～101%.

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What this paper is about

The chromogenic reaction between the reagent picramazochrom and cobalt was studied.In medium,cobalt reacted with the reagent to form a green complex which exhibited an absorption maximum at 650 nm with a apparent molar absorptivity of 2.7×104 L/mol.cm.Beer's law was obeyed in the range of 0~50 μg/25 mL for cobalt.The proposed method was applied to determine cobalt directly in spherical nickel hydroxide of the RSD(n=5) between 0.8% and 1.6%,and the recovery was 99%～101%.

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Available abstract

The chromogenic reaction between the reagent picramazochrom and cobalt was studied.In medium,cobalt reacted with the reagent to form a green complex which exhibited an absorption maximum at 650 nm with a apparent molar absorptivity of 2.7×104 L/mol.cm.Beer's law was obeyed in the range of 0~50 μg/25 mL for cobalt.The proposed method was applied to determine cobalt directly in spherical nickel hydroxide of the RSD(n=5) between 0.8% and 1.6%,and the recovery was 99%～101%.

Key concepts: Cobalt, Reagent, Molar absorptivity, Nickel, Chromogenic, Hydroxide, Spectrophotometry, Chemistry

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