摘要
采用乙酰丙酮分光光度法测定水中微量甲醛的含量。本法在４１４ｎｍ波长处有最大吸收，吸收值和甲醛含量之间有良好的相关关系，相关系数ｒ为０．９９９９９，用于样品检测的相对平均偏差小于２％，加标回收率在９５％－１０５％之间。显色可稳定达１小时。用本法检测长效清（复方甲醛）应用过程中甲醛浓度的变化，发现甲醛含量始终在其最初浓度的±１０％以内。
An Acetylacetone spectrophotometric method was used to determine the concentraition of micro formaldehyde in water. The maximum absorbance was at 414nm. The calibration curve was linear over the range 0.2￣3 μg/ml, the regression coefficient was 0.99999 ,the relative standard deviation was lower than 2%, the recovery was 100%± 5%. The absorbance value could keep stable in 1 hour . We used this method to detect the variation of concentration of micro fomaldehyde of Changxiaoqing dilution in use , and found that the concentration of micro formaldehyde was very stable, always within the original concentration ±10%.
出处
《中国兽药杂志》
北大核心
1997年第2期16-18,共3页
Chinese Journal of Veterinary Drug
