在pH=1.81的Britton-Robinson(BR)缓冲溶液中,全氟辛烷磺酸(PFOS)与罗丹明B(RhB)通过静电引力和疏水作用使RhB的光散射增强,荧光发生猝灭.利用在普通荧光光度计上单次扫描获得的340nm处的光散射强度(I340)与596 nm处的荧光强度(F596)之比,建立了测定PFOS的光散射/荧光比率法,检出限(3σ)为17 nmol/L.方法用于环境水样中PFOS的测定,RSD≤4.2％.
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