a new method was developed for the composition quantitative determination of heavy alkylbenzene sulfonate(HABS)in surfactant complex systems. The absorption spectra of HABS showed the presence of β-cyclodextrin(β-CD)could result in the enhancement of absorption intensities of HABS. The results indicated that the determination precision of HABS can be significantly improved by β-CD,and the effect of several common interfering substances(SDS,OP-10,HPAM,Cl-,Na +,Ca2 +,etc.)on determination of HABS in β-CD aque...