International Crystal Laboratories' polystyrene calibration film with certificate of traceability to seven (7) NIST frequencies, certified as to absorption minima and maxima differentials at 2870cm-1 and 2849.5cm-1 and 1589cm-1 and 1583cm-1 as required by PhEur 2.2.24 and also certified to PhJap 2.25. Mounted on 2" x 4" card stock
Unit of Measure
