title: Kinetic spectrophotometric method for rapid determination of trace formaldehyde in foods.
abstract: A simple and sensitive kinetic-spectrophotometric method was developed for the determination of ultra trace amount of formaldehyde in food samples. The method was based on the oxidation of rhodamine B (RhB) by potassium bromate in sulfuric acid medium (formaldehyde as catalyst). The reaction was monitored by measuring the decrease in absorbance of the dye at 515 nm after 6 min. The developed method allowed the determination of formaldehyde in the range of 10-100 microg L(-1) with good precision, accuracy and the detection limit was down to 2.90 microg L(-1). The relative standard deviations for the determination of 10 and 60 microg L(-1) of formaldehyde were 3.0% and 1.9% (n = 10), respectively. The method was found to be sensitive, selective and was applied to the determination of formaldehyde in foods with satisfactory results.
authors: Tianjin Key Laboratory of Food Nutrition and Safety, Faculty of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China.
authors: Xiaojun
authors: X
authors: Cui
authors: Guozhen
authors: G
authors: Fang
authors: Liqin
authors: L
authors: Jiang
authors: Shuo
authors: S
authors: Wang