【摘要】 以 pH =9～ 11的条件下 ,用乙酸乙酯萃取电解—还原法生产的对氨基苯酚 (PAP)产品中的 4 ,4′—二氨基二苯醚 (DAPE) ,并以 2mol/LHCl将DAPE反萃取到水相中 ,在激发和发射波长分别为 2 5 4和 36 0nm条件下 ,荧光强度与DAPE的量成正比 ,线性范围为 30～ 180 μg/L ,检测限为 8.0 μg/L ,样品加标回收率为 78～ 95 % .更多还原

【Abstract】 The determination of 4,4′-diaminodiphenyl ether with fluorimetry is studied. The 4,4′—diaminodiphenyl ether is extracted from product of p_aminophenol (PAP) by ethylacetate at pH 9～11. Organic phase is backextracted by 2.0 mol/L HCl. The maximal excitation and emission wavelengths of 4,4′-diaminodiphenyl ether were found to be 254nm and 360nm, respectively. The linear range is 30～180μg/L,and the detection limit is 8.0μg/L for 4,4′—diaminodipyenyl ether. The recovery of standard addition is from 78 to 95%.更多还原