Secondary to None.
Standards in Circular Dichroism
Ammonium d-10-camphorsulfonate (ACS) is a NIST traceable standard that has been the CD scale calibration standard for over 30 years. ACS has two well-defined peaks in both the near- and far-UV, which makes it an excellent calibration standard since protein structure studies are measured in the same spectral region.
Solution preparation is quick and easy since ACS is a non-hygroscopic material and is stable for an extended period of time when refrigerated.
How to calibrate your CD scale.
Select the ACS standard according to your validation needs. It can be purchased with either the full documentation matrix of NIST traceability to SRM-17f for QC/QA environments or a certificate of analysis.
Learn more about ACS and other CD calibration standards.