A standard curve is a type of graph used as a quantitative research technique. Multiple samples with known properties are measured and graphed, which then allows the same properties to be determined for unknown samples by interpolation on the graph. The samples with known properties are the standards, and the graph is the standard curve.
Standard curves are most commonly used to determine the concentration of a substance such as protein or DNA. For example, a standard curve for protein concentration is often created using known concentrations of bovine serum albumin. The property measured may be absorbance, optical density, luminescence, fluorescence, radioactivity, or other parameters.
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Famous quotes containing the words standard and/or curve:
“Neither I nor anyone else knows what a standard is. We all recognize a dishonorable act, but have no idea what honor is.”
—Anton Pavlovich Chekhov (1860–1904)
“I have been photographing our toilet, that glossy enameled receptacle of extraordinary beauty.... Here was every sensuous curve of the “human figure divine” but minus the imperfections. Never did the Greeks reach a more significant consummation to their culture, and it somehow reminded me, in the glory of its chaste convulsions and in its swelling, sweeping, forward movement of finely progressing contours, of the Victory of Samothrace.”
—Edward Weston (1886–1958)