I have 40 years of experience in the field of analytical chemistry, with specific knowledge of infrared spectroscopy, Raman spectroscopy, and chemometrics. I have published on such topics as Fourier transform infrared spectroscopy (FTIR), various types of reflection spectroscopy (internal, diffuse, specular), and analytical applications of infrared and Raman spectroscopy. I have testified on composition of pharmaceutical polymorphs, Raman imaging data and the composition of coal.