Ключевые слова: analysis, background, biochemistry, biotechnology, chemicals, chemistry, chromatography, clean, closeup, college, danger, education, experiment, extraction, fast, fiber, gas, holder, injection, isolated, lab, laboratory, learning, measure, measurement, microextraction, modern, organic, phase, physical, procedure, research, risk, safety, science, simple, solid, solvent free, spme, syringe, teaching, technique, test, university, volume,