Model ftir 8400 spectrometer

IR spectroscopy of unmodified, hydride and propanol bonded silicas was carried out using a Shimadzu, Model FTIR-8400 spectrometer (Columbia, MD, U.S.) equipped with a diffuse reflectance IR Fourier transform accessory. Solid state NMR characterization was carried out on the 3-hydroxypropyl bonded silica phase using a Bruker Advance II-400 MHz NMR spectrometer (Rheinstetten, Germany) equipped with a Bruker MAS II probe. Electrophoretic separations were performed on an Agilent model 7100 CE System (Palo Alto, CA, U.S.). Static contact angle measurements were carried out on a home-made goniometer. Carbon content of the modified silica microparticles were determined on a FlashEA 1112 elemental analyzer Thermo Inc. (Waltham, MA, U.S.).

IR spectroscopy was performed on a Shimadzu, Model FTIR-8400 spectrometer (Columbia, MD, U.S.) equipped with a diffuse reflectance infrared Fourier transform (DRIFT) accessory. Solid state NMR characterization was carried out using a Bruker Advance II-400 MHz NMR spectrometer (Rheinstetten, Germany) equipped with a Bruker MAS II probe. Electrophoretic separations were performed on Agilent model 7100 or 1600 CE Systems (Palo Alto, CA, U.S.). Atomic force microscopy (AFM) images were obtained with an Asylum Research model MFP-3D-SA (Santa Barbara, CA, U.S.) instrument. Carbon percent measurements were carried out on a FlashEA 1112 elemental analyzer Thermo Inc. (Waltham, MA, U.S.).