Study on Quantitative Mechanism and the Interference of the UV Spectrum of HABS Reduced by β-Cyclodextrin

A novel ultraviolet absorption spectrometry method was developed for the quantitative determination of HABS by addingβ-cyclodextrin with the molar ratio of 1∶1in strong interference aqueous solution.The results indicated that the effect of several common interfering flooding agents(SAS,OP-10,HPAM)on the determination of HABS could be greatly reduced inβ-cyclodextrin aqueous solution.Thus,the determination errors of the determined HABS were less than 2.0%under strong interference,and the detection limit(S/N=3)of the method could be also as high was 8.3~9.1×10-4 mg·L-1.Various characterization results including 1 H-NMR,TG-DSC and FTIR showed the interaction betweenβ-cyclodextrin and HABS.The results of 1 H-NMR analysis showed that HABS molecule could enter into the interior of the cavity ofβ-cyclodextrin molecule.TG-DSC analysis exhibited that the stable inclusion ofβ-cyclodextrin and HABS could be automatically formed.The interactions between the functional groups ofβ-cyclodextrin and HABS were showed by FTIR analysis,which also exhibited that the stable inclusion could be formed by HABS entering from the narrow or the broad mouth of theβ-cyclodextrin.The interference of the UV spectrum of HABS could be reduced byβ-cyclodextrin since the interaction betweenβ-cyclodextrin due to the interaction betweenβ-cyclodextrin and HABS in the inclusion complex.