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Protein Analysis
When is it appropriate to use a CLIA instead of an EIA?
A CLIA, or chemiluminescent immunoassay, is more sensitive than an EIA (enzyme immunoassay) and is used when samples contain very…
Tue, Jul 18, 2023
Do I have to use a wavelength correction when reading an ELISA plate?
Reading at dual wavelengths corrects for the optical density contributed by the plastic the plate wells are made of as…
Tue, Jul 18, 2023
Can I use a spectrophotometer to read my assay?
No, not unless the product specific instruction manual specifically gives you this option. A microtiter plate reader capable of detecting…
Tue, Jul 18, 2023
How do I know if I need to dilute or extract my samples?
If your samples contain analyte levels within the dynamic range of the assay at the minimum recommended dilution for your…
Tue, Jul 18, 2023
What is the minimum recommended dilution for samples? Can I dilute less?
This is the minimum dilution required to eliminate matrix interference in the assay. In general, this data is collected using…
Tue, Jul 18, 2023
Can you explain why I am seeing inconsistent standard curves run in culture media?
Often times, the serum supplemented into media can be problematic. In order to minimize this problem it is very important…
Tue, Jul 18, 2023
Edge Effects
Where was the plate incubated? Often times the conditions for ambient incubations can be less than ideal. If there is…
Tue, Jul 18, 2023
Poor Standard Curve
What was used as the standard diluent? Diluents other than the supplied assay buffer may contain interfering substances that can…
Tue, Jul 18, 2023
Poor Precision
Were the wells washed properly? All wells receive the same treatment during the wash step. If some are washed less…
Tue, Jul 18, 2023
Drift
Were reagents brought to room temperature prior to use? If the reagents are not at a constant temperature prior to…
Tue, Jul 18, 2023