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A Novel Kinetic Spectrophotometry Method for Determination of Trace Iron by reaction of Bromophenol blue and potassium periodate

Gao Hong-wei

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Abstract

A kinetic spectrophotometric method for determination of trace iron (Ⅲ) was established.It was based on the Fe (Ⅲ) catalyzed discoloring reaction of Bromophenol blue by potassium periodatein the presence of Hac-NaAc solution (PH=3.6). The sensitivity of method is 3.1 ×10~(-7)g/L. Therang of determination is 0-48μg/L The apparent activation of catalytic reaction is 98. 66KJ. mol-1.The method has been applied to the determination of iron in water samples with satisfactory results.

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A kinetic spectrophotometric method for determination of trace iron (Ⅲ) was established.It was based on the Fe (Ⅲ) catalyzed discoloring reaction of Bromophenol blue by potassium periodatein the presence of Hac-NaAc solution (PH=3.6). The sensitivity of method is 3.1 ×10~(-7)g/L. Therang of determination is 0-48μg/L The apparent activation of catalytic reaction is 98. 66KJ. mol-1.The method has been applied to the determination of iron in water samples with satisfactory results.

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Available abstract

A kinetic spectrophotometric method for determination of trace iron (Ⅲ) was established.It was based on the Fe (Ⅲ) catalyzed discoloring reaction of Bromophenol blue by potassium periodatein the presence of Hac-NaAc solution (PH=3.6). The sensitivity of method is 3.1 ×10~(-7)g/L. Therang of determination is 0-48μg/L The apparent activation of catalytic reaction is 98. 66KJ. mol-1.The method has been applied to the determination of iron in water samples with satisfactory results.

Key concepts: Bromophenol blue, Potassium periodate, Chemistry, Spectrophotometry, Periodate, Potassium, Catalysis, Inorganic chemistry

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