Gas flow-assisted headspace-single drop microextraction to determine benzene, toluene, ethylbenzene and xylene in aqueous samples

A rapid and green GC-MS method for the sampling of volatile organic compounds in spices and flowers by concurrent headspace single-drop microextraction and solid-phase microextraction

“…It is also possible to increase the volume of solvent drop with the use of a sleeve at the needle tip to provide drop stability. 19,27…”

“…It is also possible to increase the volume of solvent drop with the use of a sleeve at the needle tip to provide drop stability. 19,27 Author contributions Manju Gupta: investigation, data collection, validation, writing original dra. Soumitra Soni: investigation, data collection, validation.…”

“…26 In another modification, nitrogen was bubbled upwards through the sample solution taken in a column placed with a 15 μL extraction drop of 1-undecanol in the headspace supported by a bell-shaped needle sleeve. 27 The nitrogen bubbling effectively transported analytes to the headspace, and a bigger than usual solvent drop contributed to higher and faster extraction.…”

“…26 In another modication, nitrogen was bubbled upwards through the sample solution taken in a column placed with a 15 mL extraction drop of 1-undecanol in the headspace supported by a bell-shaped needle sleeve. 27 The nitrogen bubbling effectively transported analytes to the headspace, and a bigger than usual solvent drop contributed to higher and faster extraction. SPME works on carefully selected bers which are expensive, fragile and liable to have residual memory from the previous sampling/injection unless suitable measures are taken before the next sampling.…”