One-step enrichment and chemiluminescence detection of sodium dodecyl benzene sulfonate in river water using Mg–Al–carbonate layered double hydroxides

In this work, Mg–Al CO3-layered double hydroxides (LDHs) were used as adsorbent materials for sodium dodecyl benzene sulfonate (SDBS) in aqueous solutions, the enriched SDBS can be directly detected by IO4−–H2O2 chemiluminescence (CL) system. The commonly existing cations cannot be enriched by Mg–Al CO3-LDHs due to the structurally positively charged layers of LDHs, while other adsorbed anionic interferents had no effect on the IO4−–H2O2 CL reaction. The corresponding linear regression equation was established in the range of 0.1–10μM for SDBS. The detection limit at a signal-to-noise (S/N) ratio of 3 for SDBS was 0.08μM. The relative standard deviation (RSD) for nine repeated measurements of 0.5μM SDBS was 2.6%. This proposed method has been successfully applied to the determination of SDBS in river water samples. To the best of our knowledge, we have first time coupled the high enrichment capacity of LDHs towards anions with CL detection for analytes. [Display omitted] •Mg–Al CO3-LDHs were used as adsorbent materials for SDBS.•The enriched SDBS can be selectively detected by IO4−–H2O2 CL system.•This proposed method has been applied to the determination of SDBS in river water samples.•We have first time coupled high enrichment capacity of LDHs with CL detection.