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Q: Please elaborate what is the difference between the In-Spec UV Standard #1 through #8, #20, and #30. I am trying to determine if these will meet our needs.

Thanks you.
A: The difference in the various In-Spec Standards is the concentration level of the solution. As the value increases the absorbance values increase. A Selection Guide is available in the Downloads section of the GFS Chemicals website or you may visit for more information.