作　　者： ; ; ; ; ; ;

机构地区： 湖南大学环境科学与工程学院

出　　处： 《分析科学学报》 2008年第4期381-384,共4页

摘　　要： 本文研究了在环己烷存在下，β-环糊精诱导N-二氨乙基-4-溴-1，8-萘酰亚胺（DBN）的室温磷光（RTP），λex/λcm=347／572nm。详细考察了影响DBN室温磷光的各种因素，如β-环糊精、环己烷用量等。在pH1.0～4．0范围内，RTP强度随pH值增大而减小。优化实验条件下，DBN的浓度在2．0×10^-5～9．0×10^-5mol／L范围内与RTP强度呈良好的线性关系，相关系数r=0．9984，检出限为6．7×10^-6mol／L。该方法已用于水样中DBN含量的测定，回收率为98．3％～102．6％，相对标准偏差小于1．4％。 Strong and stable room temperature phosphorescence （RTP） signals were observed in the ternary system of N-（diaminoethyl）-4-bromo 1, 8maphthalimide, β-cyclodextrin and cyclohexane. The maximum excitation and emission wavelengths were at 347 and 572 nm, respectively. The influence of the concentrations of β-CD and cyclohexane on the intensity of RTP was investigeted. Under the optimum conditions, a good linearity between the RTP intensity and the concentration of DBN from 2 × 10^-5 to 9 × 10^-5 mol/L was obtained with a detection limit of 6.7 × 10^-6 mol/L. RTP intensity decreased with the increase of pH from 1.0 to 4.0. The method was applied to the determination of DBN in water samples and the recovery was 98.3%-102.6% with a relative standard deviation less than 1.4%.

关 键 词： 室温磷光 二氨乙基 溴 萘酰亚胺 环糊精 环己烷

领　　域： [理学] [理学]