Weng Hui-ping
2010
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Journal
Chemical Reagents
Abstract
By combining 8-aminoquinoline with triazene group,a new fluorescent reagent 5-(4-bromo-diazobenzo)-8-(8-diazoamino quinoline) quinoline was first synthesized.The product was confirmed by means of elemental analysis and infrared spectroscopy.Its excitation and emission wavelengths were 416 nm and 512 nm in a basic medium,respectively.This reagent could realize fluorescence enhancement.Under optimal conditions,a linear response of BPAQAQ on Cu2+ ions was obtained in the range of 1.4×10-8~1.0×10-5 mol/L,with a detection limit of 1.1×10-8 mol/L.This target product has been used for the determination of trace Cu2+ in rice and wheat flour samples with satisfactory results.