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Study on Determination of Manganese in Environmental Sample with Spectrophotometry

Haitao Li

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Abstract

The color reaction of manganese with 2-(2-Quinolinlazo)4-methyl-1,3-dihydroxidebenzene(QAMDHB) is studied. In the presence of pH=10 NH_3Cl-NH_3·H_2O buffer medium, QAMDHB reacts with manganese to form a stable 3∶1 complex compound. The maximum absorption wavelength is 560 nm,mole absorptivity is 8.22×10~4 L·mol~(-1)·cm~(-1). Content of manganese is in range of 40 ～ 800 μg/L that obeys Beer's law. This method can be applied to the determination of manganese in environmental sample and the result is satisfactory.

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What this paper is about

The color reaction of manganese with 2-(2-Quinolinlazo)4-methyl-1,3-dihydroxidebenzene(QAMDHB) is studied. In the presence of pH=10 NH_3Cl-NH_3·H_2O buffer medium, QAMDHB reacts with manganese to form a stable 3∶1 complex compound. The maximum absorption wavelength is 560 nm,mole absorptivity is 8.22×10~4 L·mol~(-1)·cm~(-1). Content of manganese is in range of 40 ～ 800 μg/L that obeys Beer's law. This method can be applied to the determination of manganese in environmental sample and the result is satisfactory.

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Available abstract

The color reaction of manganese with 2-(2-Quinolinlazo)4-methyl-1,3-dihydroxidebenzene(QAMDHB) is studied. In the presence of pH=10 NH_3Cl-NH_3·H_2O buffer medium, QAMDHB reacts with manganese to form a stable 3∶1 complex compound. The maximum absorption wavelength is 560 nm,mole absorptivity is 8.22×10~4 L·mol~(-1)·cm~(-1). Content of manganese is in range of 40 ～ 800 μg/L that obeys Beer's law. This method can be applied to the determination of manganese in environmental sample and the result is satisfactory.

Key concepts: Manganese, Molar absorptivity, Spectrophotometry, Chemistry, Analytical Chemistry (journal), Absorption (acoustics), Buffer solution, Wavelength

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