SENTERRA II head

SureCAL Automated System Calibration System

The SureCALTM technology is a method for achieving a standard Raman spectrum that has both short and long term precision and accuracy.

SureCAL How it works
Figure 1: SureCAL - How it works

The SureCALTM technology is a method for achieving a standard Raman spectrum that has both short and long term precision and accuracy. It allows the collection of the standard spectrum which is independent from typical instrument instabilities. The SureCALTM technology simultaneously measure Raman spectrum of sample, laser/neon spectrum and neon spectrum. An Integral Transform Process is employed to correct Raman data for instrument instabilities. Transform result produces a Raman spectrum, which is Automatically calibrated in both frequency.

SureCAL Frequency Precision
Figure 2: SureCAL - Frequency precision

Figure 1: The measured spectra of the Raman Neon and Laser/Neon are split up so that they occupy different portions of the CCD detector. The Laser is combined with Neon so that an accurate frequency position can be determined. A separate channel for Neon is measured at the same resolution as the Raman channel to correct for the "breathing effects" of the system. The Laser/Neon is measured at a factor of two higher resolution than the measured Raman spectrum so that the accurate and precise position of the laser line can be determined.

Figure 2:  SureCALTM frequency performance. Frequency precision - 0.018cm-1 RSD. Toluene Over 15 Hours, One Spectrum Every 5 Minutes 45 Second Integration @ 38mW.

Benefits of SureCALTM

  • The automated Raman frequency calibration has precision and accuracy
  • Reliable and reproductible detection of small Raman shifts, e. g. stress induced line shifting, protein folding
  • High quality subtraction of Raman spectra
  • Improved chemometrical results
  • Facilitates spectrum search in digital libraries

Contact our sales team today to learn more about SureCALTM!

Technologies used are protected by one or more of the following patents:
US 6141095