How often should fixer retention be tested?

Testing for fixer retention should be conducted semi-annually to ensure that the fixer used in radiographic processing is functioning effectively. This interval allows for the adequate monitoring of the fixer solution to ensure that it is adequately removing unexposed silver halides from the film. Proper fixation is crucial for producing high-quality images and for protecting the integrity of radiographic films over time.

Performing this test too frequently, such as monthly or quarterly, can lead to unnecessary use of resources and possibly disrupt workflows without yielding significantly additional benefits. Alternatively, testing annually may not provide timely insights into the performance of the fixer, potentially compromising image quality or leading to increased film fog if the fixer has diminished effectiveness. Thus, a semi-annual testing schedule strikes a balance between resource management and the need for consistent quality in radiographic imaging.