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Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jan 25;135:506-10. doi: 10.1016/j.saa.2014.07.040. Epub 2014 Jul 27.

Determination of trace amount of formaldehyde base on a bromate-Malachite Green system.

Author information

1
College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China. Electronic address: tyfchky@126.com.
2
Yueyang Vocational & Technical College, Yueyang 414000, China.
3
College of Chemistry, Xiangtan University, Xiangtan 411105, China.
4
College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China.

Abstract

A novel catalytic kinetic spectrophotometric method for determination of trace amount of formaldehyde (FA) has been established, based on catalytic effect of trace amount of FA on the oxidation of Malachite Green (MG) by potassium bromate in presence of sulfuric acid medium, and was reported for the first time. The method was monitored by measuring the decrease in absorbance of MG at 617 nm and allowed a precise determination of FA in the range of 0.003-0.08 μg mL(-1), with a limit of detection down to 1 ng mL(-1). The relative standard deviation of 10 replicate measurements was 1.63%. The method developed was approved to be sensitive, selective and accurate, and adopted to determinate free FA in samples directly with good accuracy and reproducibility.

KEYWORDS:

Catalytic kinetic; Formaldehyde (FA); Malachite Green (MG); Spectrophotometric method

PMID:
25123939
DOI:
10.1016/j.saa.2014.07.040
[Indexed for MEDLINE]
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