Test methods must be suitable for the operating environment and the application’s unique water matrix. Some methods lend themselves better to cleaner or clearer waters with different interferences. Produce wash water is turbid, coloured, full of bubbles and
suspended solids. These factors can impact some test methods.
Similarly, the test method must employ materials that are suitable for the application environment; equipment or consumables that are unfit for purpose impact the practicality of the test method.
Cost is a key driver for producers as they are increasingly pushed to reduce operating costs. Selecting a test method can have a significant impact on cost particularly with regard to labour, chemicals, and test equipment. In addition to this, producers need to consider the risk and costs of exposure to contaminated produce, caused by ineffective sanitization procedures.