摘要
利用铵盐、乙酰丙酮及醛基反应生成的黄色产物的荧光性质 ,分别用紫外可见分光光度法及荧光分光光度法研究了影响黄色物质生成速度的各种因素 .常温下 ,柠檬酸铵浓度 4 mol/ L和乙酰丙酮浓度 0 .0 4 mol/ L的实验条件下 ,黄色物质在 2 4 s时间内可快速生成 .荧光分光光度测定甲醛的线性范围为 :0 .4～ 1 .0 μg/ m L,该方法用于自来水中甲醛的加标回收 。
The yellow substance produced by the reaction of ammonium salts, acetyl acetone with aldehyde group can absorb UV Vis light and emit fluorescence. All factors which influence the reaction speed of the yellow product are investigated by UV Vis and fluorescence spectrometry. Under ambient temperature, the reaction of the yellow product of formaldehyde with 4 mol/L ammonium citrate and 0.04 mol/L acetyl acetone can be quickly developed in 24 seconds. The linear range of formaldehyde measured by fluorescence is 0.4～1.0 μg/mL. The method has been applied to measure formaldehyde concentrations in tap water with satisfactory results.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第2期185-188,共4页
Journal of Central China Normal University：Natural Sciences
基金
湖北省重点科技研究项目 ( 992 P0 3 1 5)
华中师范大学大学生科技项目
