Pathlength Calibration Program for Pearl
For calculating the pathlength of a cell formed between two parallel windows, the interference fringe method is commonly employed. For cells with non-parallel, or “wedged” windows, such as those available for the Pearl™ Liquid Transmission Accessory, this method is not possible because the interference fringes are not seen. Instead, the known absorbance of a particular solvent in a parallel windowed reference cell can be used to calibrate a wedged test cell.
- The Specac Pathlength Calibration software takes spectra of n-heptane recorded on the customer’s wedged cells and reports a pathlength based on our in-house calibration routine.
- The method is fast and easy to carry out. The program contains video instructions to aid users in following the method accurately.
- In addition to the n-heptane calibration, the program also contains a calculator for measuring the pathlength of parallel cells via the usual interference fringing method.
- Compatible with all liquid cells including: Pearl and Omni-Cell, Advanced liquids cells.