[Study on the enhanced spectrum quantitative analysis of SDBS induced by beta-cyclodextrin]

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Supramolecular Chemistry

Context:

• Quantitative analysis of sodium dodecylbenzenesulfonate (SDBS) is challenging due to strong interferences from common substances like SDS, OP-10, and HPAM.
• Existing ultraviolet absorption spectrometry methods lack the necessary precision and range for accurate SDBS determination in complex matrices.
• Beta-cyclodextrin (beta-CD) is known for its ability to form inclusion complexes, offering potential for enhancing analytical methods.

Purpose:

• To develop and validate a novel enhanced ultraviolet absorption spectrometry method for the quantitative analysis of SDBS.
• To investigate the role of beta-cyclodextrin (beta-CD) in enhancing SDBS absorption intensity and improving analytical performance.
• To assess the method's effectiveness in reducing interferences from common co-existing substances and determine the stability of the formed inclusion complex.

Summary:

• A new method utilizing beta-cyclodextrin (beta-CD) significantly enhances ultraviolet absorption spectrometry for SDBS quantification.
• The presence of beta-CD increases SDBS absorption intensity, leading to improved linearity, precision (10(-2) - 10(-3) mg x L(-1)), and a wider determination range.
• The beta-CD-SDBS inclusion complex (1:1 molar ratio) effectively minimizes interference from SDS, OP-10, and HPAM, with maximum errors below 2.0% under multifactor interferences.

Impact:

• Provides a highly precise and robust analytical method for SDBS determination, crucial for environmental monitoring and quality control.
• Demonstrates the utility of beta-cyclodextrin as an effective additive for improving spectroscopic analysis in the presence of interferents.
• The study elucidates the formation and stability of beta-CD-SDBS inclusion complexes, contributing to the understanding of host-guest chemistry in analytical applications.