A simple and green analytical method for the determination of formaldehyde

Journal of the Brazilian Chemical Society

Fabrícia Gasparini¹  Patrícia L. Weinert¹  Liliane S. Lima¹  Leonardo Pezza¹  Helena R. Pezza¹ 

[1] ,Universidade Estadual Paulista Instituto de Química Araraquara SP ,Brazil

关键词: formaldehyde;    Mg2+;    disinfectants;    deffrizing products;    green analytical chemistry;   

DOI  :  10.1590/S0103-50532008000800012

来源: SciELO

【 摘 要 】

A green spectrophotometric analytical method for determination of formaldehyde in commercial samples was designed and investigated. Replacement of hazardous reagents was explored to attain the clean chemistry standards. The method is based on formaldehyde reaction with chromotropic acid in the presence of magnesium sulphate producing a stable complex Mg2+/ cyclotetrachromotropylene (λmax = 535 nm). To the best of our knowledge, there are no reports on the use of the above mentioned reaction for this determination. The experimental conditions were optimized by the response surface methodologies. Beer's Law is obeyed in a concentration range of 3 to 11 mg L-1 of formaldehyde with a correlation coefficient of 0.999. The proposed method was applied for the determination of formaldehyde in commercial disinfectants and deffrizing hair products. The results were favorably compared with those of the official method, with good accuracy and precision.

【 授权许可】

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