Spectrometry

Analyte

• Solid and liquid polymers; composite materials, organic and anorganic low-molecular substances, thin layers
• Sample amount: ca. 1 mg, > ca. 10 ng (FTIR microscope)

Equipment

• Equipment: Fourier Transform Spectrometer Nexus 470 (Thermo Nicolet, USA) 
• Wave number area: 7400 cm^-1 - 350 cm^-1
• Resolution: 0,5 cm^-1 - 32 cm^-1
• Detectors: DTGS-KBr
• Accessories: ATR units (among others Smart Endurance, Smart OMNI Sampler, Horizontal ATR (multiple reflection), ATR with variable incident angle, ATR elements from diamond, ZnSe, Ge, Si, KRS-5 with measuring surface of ca. 2 mm diameter
  to 1 cm x 5 cm and 3 cm x 3 cm), reflection unit with variable angle (15 °C - 85 °C), polarizer, wet chamber, cuvettes (KBr, NaCl, KRS-5, BaF2, different thicknesses), software for spectra analysis, spectra libraries

Analysis methods and response values

• Measuring of infrared spectra with unpolarized or polarized radiation
• Transmission spectra
• ATR spectra (attenuated total reflection, "internal" reflection)
• Reflection spectra ("external", "mirroring" reflection)
• Reflection at grazing incidence (GIR, IRRAS)

Aim

• Identification of polymers and low-molecular substances incl. impurities and additives, also on microscale
• Determination of the chemical composition (functional groups) and the sterical chain structure
• Characterization of surfaces
• Examination of the orientation of macromolecules and groups at massive samples and thin layers
• Spectroscopic examination at variable moisture content