Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1238315 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2007 | 4 Pages |
Abstract
A new simple and rapid catalytic kinetic method for the determination of trace amount of formaldehyde is described. The method is based on the catalytic effect of formaldehyde on the oxidation of Janus green by bromate in the present of sulfuric acid. The reaction monitored spectrophotometrically by measuring the decrease in absorbance of the reaction mixture at 618 nm. The fixed-time method was used for the first 150 s. For initiation of the reaction, under the optimum conditions, in the concentration range of 0.003-2.5 μg mlâ1 formaldehyde can be determined with a limit of detection 0.0015 μg mlâ1. The relative standard deviation of five replicate measurements is 2.3% for 1.0 μg mlâ1 of formaldehyde. The method was used for the determination of formaldehyde in real samples with satisfactory results.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
S. Abbasi, M. Esfandyarpour, M.A. Taher, A. Daneshfar,