Editing Centrifugation (section)

===Low-speed centrifuges===
Low-speed centrifuges are used to harvest chemical precipitates, intact cells (animal, plant and some microorganisms), nuclei, chloroplasts, large mitochondria and the larger plasma-membrane fragments. Density gradients for purifying cells are also run in these centrifuges. Swinging-bucket rotors tend to be used very widely because of the huge flexibility of sample size through the use of adaptors.<ref name="Graham"/> These machines have maximum rotor speeds of less than 10 000 rpm and vary from small, bench-top to large, floor-standing centrifuges.<ref>{{cite book |last1=Ford |first1=T. C. |last2=Graham |first2=John M. |title=An Introduction to Centrifugation |year=1991 |publisher=Bios |isbn=978-1-872748-40-5 |language=en}}</ref>