Analytical Method for Determination of Organochlorine Pesticides in Tea Brews using Single-Drop Microextraction with GC-ECD

作者：Pakade Yogesh B; Sharma Ruchi; Nadda Gireesh; Tewary Dhananjay Kumar^*

来源：International Journal of Food Properties, 2013, 16(4): 745-755.

DOI：10.1080/10942912.2011.565900

• Single-drop microextraction
• Gas chromatography
• Organochlorine pesticides
• Tea brew

The single drop microextraction method was developed for the determination of ten organochlorine pesticides in tea brews using gas chromatograph-electron capture detector. The optimized parameters for effective extraction required a 2 L drop of n-hexane at the tip of a microsyringe immersed in 5 mL of a diluted tea brew sample for 25 min and stirred at 600 rpm. The limit of detection in the range of 0.01 to 0.025 g/L, with relative standard deviation of repeatability and reproducibility, was in the range of 110 and 824%. The relationship of the measured signal was a linear >0.9863) of concentration and the recovery method ranged from 92116%. The single drop microextraction method showed the advantage of being easy to operate, low consumption of organic solvent, and high extraction efficiency.

• 出版日期2013-5-19