DNA/Protein Concentration Calculator
3. Beer-Lambert Law Calculator
Calculate Concentration (C) based on Absorbance (A).
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Scientific Documentation
The Beer-Lambert Law is the linear relationship between absorbance and concentration of an absorbing species. In molecular biology, this is vital for determining the concentration of purified DNA, RNA, or protein samples using spectrophotometry.
Variables: Absorbance (A) is a unitless measure of the amount of light absorbed. The molar extinction coefficient (Ξ΅) is a constant specific to the molecule being measured (e.g., proteins or nucleotides). The path length (l) is typically 1 cm for standard cuvettes.
This tool automates the derivation of concentration (C). By measuring the absorbance of light at specific wavelengths—typically 260 nm for nucleic acids or 280 nm for proteins—researchers can quantify the purity and yield of their samples. Understanding this law is essential for precise biochemical assays, PCR preparation, and protein crystallization experiments.
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