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How to make standard curve


 Can use a variety of graphics software to draw the ELISA standard curve , the following in order to "Curve Expert1.4" software , for example, draw the ELISA standard curve is as follows ;

1 .Start "Curve Expert"

(Please download Curve or download updated version Curve )

2 .X -axis the OD values of input standard , Y -axis input values corresponding to the concentration , as shown :


3 . Click [ Run ]Button , the following dialog box appears


4 . Click [ok] button, the following two dialog boxes to close a dialog box below


5 . In the upper right corner of the dialog box the name of some curves , from "1 "Start menu, then curve name will appear in the lower right corner of the corresponding fitting curves .



6 . According to the fitting curve select the best fitting curve of ELISA double click the dialog box appears as follows :

Note: The selection coefficient (the "r" value) the best curve equation for computing . In the following dialog box


The upper right corner with "r" value When the "r" value closer to 1 the better fitting


7 . Press [Ctrl] key + [L] key, the following dialog box appears :


8 . Enter the standard OD values , click [Calculate] press shy , you can get the actual content of the target protein . ( N -fold diluted samples , calculate the value should be into a N).

9 . If want ELISA curve fitting equation, the space in step 6, right-click the dialog box , select the "Information"


10 . get the following dialog box : Click "Copy"


You need to paste in the location of the data can be obtained as follows :

Rational Function: y = (a + bx) / (1 + cx + dx ^ 2)

Coefficient Data:

a = -21.531017

b = 212.05019

c = -0.24054479

d = 0.018060778


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