Frequent Questions

For laboratories testing for hexavalent chromium (chromium-VI) in drinking water using EPA Method 218.6, as modified by the Dionex Corp. Application Update 144, what is the specific pH range that samples need to be buffered?

At this time, EPA suggests a pH between 9.0 and 9.7. EPA is currently researching this question and may provide an alternate range once the research has been completed.
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