The Gerstel-Twister allows analysis of organicGrown without the use of artificial fertilizers, herbicides, etc.: Organic coffee has been grown according to organic farming techniques, typically without the use of artificial fertilizers. Some farms... compounds from aqueous matrices by Stir Bar Sorptive ExtractionRefers to the process of infusing coffee with hot water. Hot water releases or "extracts" the flavor from the roasted, ground coffee. The term is used mostly with... (SBSE): Faster than with conventionalConventional coffee means that a coffee is not organic certified, in the coffee trader parlance. techniques, omitting time-costly preparationPreparation refers to the dry-milling steps of preparing coffee for export: hulling, grading, classifying, sorting.: Preparation refers to the dry-milling steps of preparing coffee for export: hulling, grading,... steps and solvents and up to 1000´ more sensitive than SPME. The GERSTEL-Twister looks like a conventional magnetic stirring rod, and works the same – except for one small difference: While it is stirring, it adsorbs and concentrates the organic contents onto its coating of polydimethylsiloxane (PDMS).