By which method is the hemoglobin concentration commonly measured?

The hemoglobin concentration is commonly measured using an electronic counter. Electronic counters, or automated hematology analyzers, utilize light scattering and other technologies to accurately measure various blood components, including hemoglobin levels. This method allows for rapid analysis of multiple samples, providing precise and reliable results compared to subjective methods like visual inspection.

Using electronic counters minimizes human error and enhances the efficiency of the laboratory process. These machines can analyze a complete blood count, efficiently measuring hemoglobin among other parameters such as red blood cell count and hematocrit, all in a streamlined fashion.

Other methods like colorimetric tests can also estimate hemoglobin levels but are generally less reliable for high-throughput settings than electronic counters. While visual inspection and microscopic examination involve manual assessment, they are not suited for precise quantification of hemoglobin concentration, making electronic counters the preferred choice in modern laboratory practices.