Chromogranin A (CHGA)

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(3 min 24 sec)

Sandwich enzyme immunoassay for in vitro quantitative measurement of CHGA in human serum, plasma and other biological fluids.

This method calculates the mean absorbance for each set of replicated standards, controls and samples. The average of the zero standard is subtracted from all samples and a standard curve is plotted on log-log graph axes.

A 4PL is fitted through the plotted 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.



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Standard Concentrations


Dilution Factors


Sample IDs


Run Notes

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