New ionic liquid modified polymeric microspheres for solid-phase extraction of four Sudan dyes in foodstuff samples

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Sudan dyes are common food contaminants.
• Accurate detection of Sudan dyes in food is crucial for public health.

Purpose of the Study:

• To synthesize novel ionic liquid modified polymeric microspheres (ILPM).
• To develop an efficient method for Sudan dye determination in food samples.

Main Methods:

• Precipitation polymerization using [Bmim][PF6] and DVB.
• Solid-phase extraction (SPE) using ILPM sorbents.
• High-performance liquid chromatography (HPLC) for simultaneous determination.

Main Results:

• ILPM demonstrated high adsorbability for four Sudan dyes.
• The ILPM-SPE-HPLC method achieved high recovery (92.5%-106.1%) and precision (RSD ≤ 5.7%).
• ILPM provided better purification and recovery compared to traditional SPE adsorbents.

Conclusions:

• ILPM are effective sorbents for Sudan dye analysis.
• The developed ILPM-SPE-HPLC method is suitable for rapid and accurate Sudan dye determination in complex food matrices.