<P> In analytical chemistry , a calibration curve , also known as a standard curve , is a general method for determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration . A calibration curve is one approach to the problem of instrument calibration ; other standard approaches may mix the standard into the unknown , giving an internal standard . </P>
<P> In analytical chemistry , a calibration curve , also known as a standard curve , is a general method for determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration . A calibration curve is one approach to the problem of instrument calibration ; other standard approaches may mix the standard into the unknown , giving an internal standard . </P>
what is the purpose of constructing a calibration curve
what is the purpose of constructing a calibration curve
determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration
determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration