摘要
研究了在NH3·H2O-NH4Cl缓冲介质中,痕量Cu(Ⅱ)对过氧化氢氧化荧光剂吖啶橙而荧光猝灭反应存在明显的催化作用,由此建立了动力学荧光法测定痕量铜的新方法。方法的线性范围为0.008-0.16μg/L,线性回归方程△F=9.1+170.9c(μg/25mL),相关系数r=0.9992。检出限为0.0016pg/L。用本方法测定自来水和茶叶中的铜结果满意。
A kinetic-fluorimetric quenching method for detennination of trace Cu (Ⅱ ) was developed in this paper. The method was based on the catalytic effect of Cu( Ⅱ ) on oxidation of acridine orange by hydrogen peroxide in a NH3. H2O-NH4C1 buffer medium. The linear range of determination for Cu (Ⅱ) was 0.008 - 0.16 μg. L- l with a detection limit of 0.001 6 μg. L- 1 and AF = 9. 1 + 170.9 c(μg/25 mL), r = 0.999 2. The method could be applied to determine trace copper in tea and tap water samples with satisfactory results.
出处
《化学试剂》
CAS
CSCD
北大核心
2006年第11期661-662,670,共3页
Chemical Reagents
关键词
催化动力学
荧光猝灭法
吖啶橙
铜
过氧化氢
catalytic kinetic
fluorescence quenching
acridine orange
copper
hydrogen peroxide