Retention on TLC plates is measured in Rf (retention factor), whereas in column chromatography, it is usually expressed in CV (column volumes): R f = (distance traveled by desired compound) / (distance traveled by solvent) CV = 1 / R f
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By Donald J. Valachi, CCIM | May.Jun.95. An option to purchase investment real estate is simply a contract to sell a property at a specified price during an allotted period of time. Options can provide advantages to both sellers and buyers, depending on the circumstances of the market and the property.