摘要
利用在硫酸介质中,草酸能催化重铬酸钾氧化罗丹明B褪色,使体系荧光猝灭,建立了催化荧光法测定草酸的方法,催化反应在50℃水浴中进行10 min,测定草酸的线性范围为0.4～12.0 mg/L,其回归方程为△F=17.423c(mg/L)+110.47,r=0.9994。此法用于啤酒中草酸含量的测定,结果满意。
In the sulphar intermediary, oxalic acid could catalyze potassinm dichromate oxygenate rhodamine B colour and perish the fluorescent system suddenly. Accordingly, catalyzing fluorescence method was set up to measure oxalic acid content in beer and the technical paramters were as follows：10 rain catalytic reaction under 50 ℃ water bathing, the linear range of oxalic acid was 0.4-12.0 mg/L, and the regression equation as △F=17.423c （mg/L）＋110.47, γ=0.9994. This method could achieve satisfactory measurement effects.
出处
《酿酒科技》
北大核心
2006年第12期110-111,共2页
Liquor-Making Science & Technology
基金
山西省自然科学基金(20051028)
关键词
分析检测
啤酒
草酸
荧光法
analysis and determination
beer
oxalic acid
fluorescence method
