TLC (thin layer chromatography) is a popular method used to separate chemical mixtures. Often when TLC is used for separations each individual spot on the plate must be scraped off, extracted from the ...

Claire Hartmann-Thompson is a chemist at 3M, but outside the lab, she and other 3M scientists lead demos for students in grades 1 through 6, showcasing chemistry. In this demo, Hartmann-Thompson ...