Headspace solid phase microextraction of nicotine using thin layer chromatography plates modified with carbon dots

A simple, inexpensive and efficient procedure was developed for solid-phase microextraction of nicotine from the headspace above an aqueous sample. A thin layer chromatography (TLC) plate modified with carbon dots (TLC@CDs) was used as a sorbent. Nicotine is absorbed and then can be eluted with ethanol and submitted to isocratic reverse-phase HPLC with UV detection. The method excels by extraction efficiency and rapid extraction. Under optimized conditions, the calibration graph was linear in the nicotine concentration range from 10 to 400 mu g L-1, with a correlation coefficient of 0.9998. The limit of detection was 6 mu g L-1. This procedure was successfully applied to the determination of nicotine in spiked biological samples. The relative mean recoveries ranged from 94.4 to 105.8 %. A simple and sensitive headspace-solid phase microextraction procedure was developed for sorption of nicotine from the headspace above an aqueous sample. A thin layer chromatography plate modified with carbon dots was used as a sorbent.