As the solvent vapour rises and condenses, it drips back to the sample thimble. The coated stir bar is used for a set amount of time, achieving high quantities of extraction – if not quite as pure as alternative methods.Īlso known as Soxhlet extraction, liquid-liquid extraction uses a sample thimble above a boiling flask of solvent, all contained within a condenser. Produced as a molecular template in line with the target analyte, MIP sorbents can selectively extract the target analyte from samples.Īs the name suggests, stir-bar sorptive extraction involves a stir bar which is coated with the sorbent and placed into the sample to extract the analyte. Short for molecularly imprinted polymer, MIP is a type of sorbent which can be used for the two methods above.
In this case, it’s known as solid-phase microextraction. Solid-phase extraction can be performed with a small fibre or tube using a thin layer of sorbent. This fundamental extraction type has a number of variants, including… The analyte will be retained on the sorbent, along with some impurities which can be washed away. The sample is then loaded onto the cartridge. Solid-phase extraction is a simple extraction technique where the sample is loaded onto a cartridge with a sorbent. Read on as we explore eight extraction techniques… There are various ways to do so, from solid-phase extraction to microwave-assisted extraction. It involves extracting the analyte of interest from the sample matrix. Extraction is one of the most common techniques for sample preparation.
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