This data analysis tool calculates sample concentrations using a Four Parameter Logistic (4PL) curve fit in accordance with Neogen’s Cortisol (402710) kit.
This analysis optionally includes a substrate background correction step. If a blank group is defined on your layout, the mean of the blank replicates is first subtracted from the raw data measurements.
The maximal binding (%B/B0) is calculated for each sample using the B0 measurement.
The standard data points (concentration vs. %B/B0) are plotted on semi-log axes and a 4PL curve is fitted through the points. The concentrations of the samples are determined from the fit with any specified dilution factors applied.
The %CV, Standard Deviation and Standard Error are calculated for each replicated sample.
Samples outside the range of the standards or the fit (greater than the upper asymptote or below the lower asymptote) are highlighted in yellow.
If the entire plate was read then supply the measured value for each well. Alternatively, if only specific parts of the plate were read then list only those measured values. In this case an additional step is required: under the Microplate section below, select or create a layout which defines which wells were read and which were not. More...
A zero concentration value has been specified with a logarithmic x axis.
This is valid but means that you will not see the zero standard on the chart, also in certain cases it may result in a skewed fit. One alternative is to use a suitably low value, such as 0.01 instead of zero. More...
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