The absorbance standards are used to test the accuracy of your spectrometer setup. We over a set for 200-450nm and a set for 400-900 nm.

NIST-Traceable UV Absorbance Standards

The STAN-ABS-UV kit is certified from 200-450 nm ...more here

Code:stan-abs-uv SKU:STAN-ABS-UV

NIST-Traceable Visible Absorbance Standards

STAN-ABS-VIS kit is certified from 400-900 nm. ...more here

Code:stan-abs-vis SKU:STAN-ABS-VIS