Analytical methods to detect boron. Standardized methods available for the analysis of total boron in drinking water and their respective MDLs are summarized in Table 3. MDLs are dependent on the sample matrix, instrumentation, and selected operating conditions and will vary between individual laboratories. These methods are subject to a variety of interferences, which are outlined in detail in the respective references. Analysis of boron should be carried out as directed by the responsible drinking water authority. Drinking water utilities should discuss sampling requirements with the accredited laboratory conducting the analysis to ensure that quality control procedures are met and that minimum reporting levels are low enough to ensure accurate monitoring at concentrations below the maximum acceptable concentration (MAC).