How Can the BCA Method for Protein Quantification Be Evaluated for Compliance with the Beer–Lambert Law?
The Beer-Lambert Law describes how the absorbance (A) of a solution is related to its concentration (C), expressed as A = ε·l·C, where ε represents the molar absorptivity coefficient and l denotes the optical path length through the solution (typically 1 cm).
If the standard calibration curve exhibits a linear relationship, that is, if the absorbance is directly proportional to the protein concentration, the measurement can be considered to obey the Beer-Lambert Law. However, if the curve displays nonlinearity or systematic deviation, it is advisable to re-examine the experimental conditions or verify the integrity and performance of the BCA reagents used.
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