Why is it essential to calibrate fluorescence detection equipment before use?

Calibrating fluorescence detection equipment is crucial to guarantee accurate measurements of fluorescence intensity. When the equipment is calibrated, it establishes a reference point that allows for reliable comparisons between the detected fluorescence signals and known standards. This ensures that the intensity readings reflect the true concentrations of the fluorescent compounds being analyzed, such as GFP in purifications. Accurate measurements are essential for reproducibility and validity of experiments, which is especially important in research and diagnostic applications where precise quantification can significantly impact results and conclusions.

While other factors like minimizing noise and preventing malfunction are important, they do not directly address the primary necessity of achieving precise and accurate fluorescence readings, which is vital in any experimental setup involving fluorescence detection.