Determination of Trace Formaldehyde in Alcoholic Beverage by Chromotropic Acid Spectrophotometry
A simple spectrophotometric method was developed for the determination of trace formaldehyde in alcoholic beverage samples. The method was based on the reaction between formaldehyde and chromotropic acid in the medium of sulfuric acid and aqueous hydrogen peroxide. The reaction was monitored by measuring the absorbance of the product at 575nm after 30min in the boil water bath. A detection limit of 0.033 μg ·mL-1.was achieved. The relative standard deviation for the determination of 0.235 and 1.2 μg · mL-1 of formaldehyde were 1.95％ and 0.93％ (n=5), respectively. The method was found to be sensitive, selective and was applied to the determination of formaldehyde in alcoholic beverage with satisfactory results.
Formaldehyde spectrophotometric method chromotropic acid alcoholic beverage
LI Yu-liang LIU JIan Guan Wei-sheng
Environmental Science and Engineering School Chang-An University Xi′an 710054,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）