Multiple headspace single-drop microextraction-a new technique for quantitative determination of styrene in...

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Single-drop microextraction (SDME) is a miniaturized technique for analyte extraction.
• Quantitative determination of volatiles in solid matrices using SDME requires specialized approaches.

Purpose of the Study:

• To combine SDME with multiple headspace extraction (MHE) for analyzing volatiles in solid samples.
• To develop and validate a multiple headspace single-drop microextraction (MHS-SDME) method for styrene determination in polystyrene (PS).

Main Methods:

• Developed MHS-SDME by combining SDME and MHE techniques.
• Facilitated styrene migration via sample grinding and incubation at 150°C for 1 hour.
• Utilized 2 µL of butyl acetate as the microextraction solvent with 5-minute extraction cycles.

Main Results:

• Achieved good linearity for MHS-SDME of styrene in PS (R²=0.999) between 0.005 and 0.75 µg/mL.
• Obtained a low limit of quantitation (0.005 µg/mL) and relative standard deviation (7.6% for n=6).
• Demonstrated good agreement with a previously reported dissolution-precipitation method.

Conclusions:

• MHS-SDME is a novel and effective technique for the quantitative analysis of volatile compounds in solid matrices.
• The developed method provides a sensitive, reliable, and efficient approach for styrene determination in polystyrene samples.