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You need to analyze two samples: a) from gas station tank (gas quality test) b)crop extract...

You need to analyze two samples: a) from gas station tank (gas quality test) b)crop extract for pesticide presence. Which separation method will you choose and why?

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(a) Gas chromatography is commonly used as a separation method for analyzing gas samples because this method has high resolution power. It is more accurate and has more precision.

(b) To analyze crop extract for pesticide presence the separation methods such as pressurized liquid extraction (PLE) and supercritical fluid extraction (SFE) using aqueous solvent are applied. Aqueous extraction is preferred because alomost all pesticides are soluble in water. Water as a solvent is easily available, safe to use and also less costly.

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