The photometer is an instrument widely used across various scientific fields that can measure the intensity and absorbance of light. In the biomedical field, photometers have many important applications, including analyzing medicine concentration, enzyme activity, and cell proliferation.

First, photometers play a crucial role in medicine concentration analysis. By measuring the absorbance of medicine solutions with a photometer, medicine concentration can be accurately determined. Second, photometers are widely used in enzyme activity research. By measuring changes in the absorbance of enzyme substrates, changes in enzyme activity can be indirectly assessed, thereby studying enzyme function and regulatory mechanisms. Furthermore, photometers play an important role in cell proliferation experiments. By measuring the relationship between cell number and time in cell culture, parameters such as cell proliferation rate and cell cycle can be studied.

When choosing a suitable laboratory photometer for the experiment, you need to consider factors such as measurement range, resolution, and stability, and make your choice based on your experimental needs and budget constraints.