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|Title:||Kinetic — spectrophotometric determination of trace amounts of manganese(II) by it's catalytic effect on the oxidation of methyl orange with periodate|
Rahmati, Fatemeh Razzaz
Hajimoosa, Mohammad Ali
|Abstract:||A kinetic — spectrophotometric method for the determination of trace amounts of Mn(II) has been described based on its catalytic action on the oxidation of methyl orange by period ate. The reaction has been monitored spectrophotometrically by measuring the decrease in absorbance at 474 nm , by the fixed-time method of 5 min from initiation of the reaction. The decrease in absorbance at 474 nm is found to be proportional to the Mn(II) concentration in the range of 4-52 ng ml-1, with limit of detection as 0.5 ng ml-1, and relative standard deviation for ten replicate analyses of 20 ng ml-1 as 3.8%. The method has been used for the determination of Mn(II) in standard soil sample with good accuracy. The effect of interfering cations and anions has also been studied.|
|Appears in Collections:||IJC-A Vol.42A(01) [January 2003]|
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