Determinação de manganês em material particulado atmosférico de ambientes de trabalho utilizando eletrodo de diamante dopado com boro e voltametria de onda quadrada com redissolução catódica

Química Nova

Fabiana Da Silva Felix²  Rita De Cássia Mendes De Barros²  Jaim Lichtig²  Jorge C. Masini²  Neidenêi Gomes Ferreira¹ 

[1] ,Universidade de São Paulo Instituto de Química São Paulo SP

关键词: manganese;    boron-doped diamond;    square wave voltammetry;   

DOI  :  10.1590/S0100-40422005000600013

来源: SciELO

【 摘 要 】

A boron-doped diamond electrode is used for determination of Mn(II) in atmospheric particulate matter by square wave cathodic stripping voltammetry. The analytical curve was linear for Mn(II) concentrations between 5.0 and 37.5 µg L-1, with quantification limit of 3.6 µg L-1. The precision was evaluated by the relative standard deviation, with values between 5.1% and 9.3%. The electrode is free of adsorption, minimizing memory effects. Samples collected in the workplace atmosphere of a foundry had Mn(II) concentrations between 0.4 and 4 µg m-3. No significant differences were observed between the proposed method and inductively coupled plasma optical emission spectroscopy.

【 授权许可】

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