کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1171098 | 1491174 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Kinetic spectrophotometric method for rapid determination of trace formaldehyde in foods Kinetic spectrophotometric method for rapid determination of trace formaldehyde in foods](/preview/png/1171098.png)
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 μg L−1 with good precision, accuracy and the detection limit was down to 2.90 μg L−1. The relative standard deviations for the determination of 10 and 60 μg 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.
Journal: Analytica Chimica Acta - Volume 590, Issue 2, 8 May 2007, Pages 253–259