Novel Robust Internal Calibration Procedure for Precise FT-IR Measurements of Nitrogen Impurities in Diamonds

FT-IR spectroscopy is the basic finger-print method for qualitative and quantitative analysis of nitrogen, boron, hydrogen impurities in natural synthetic diamonds. In measurements impurity concentrations, external standard samples are required calibration procedure during analysis. this study, double-phonon mid-IR absorption coefficient optical phonons diamond host matrix, robust internal standard, was accurately measured tens diverse samples, thus enabling precise calibrated ultra-low detectable concentrations.