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In situ Fourier transform infrared absorption spectroscopy has been used to study the composition of particles formed and suspended in radio-frequency discharges of silane-oxygen-argon gas mixtures. The silane gas constumption was observed by infrared abso ...
Iodide and iodate can be determined by two new methods using anion-exchange chromatography with postcolumn reaction and UV/visible detection. Iodide is determined as IBr2- at 249 mn. Iodate is determined as I-3(-) at 288 nm. The analyses can be run complet ...
The use of many plastic packaging materials such as PVC, PAN, etc. to protect food and beverages is restricted because of toxicity and recycling problems and there is a need for the development of new packaging materials with good gas barrier properties. P ...
The invention relates to a device for producing a gas mixture consisting of HMDSO and oxygen, whereby process gas is produced. In order to be able to continuously produce a large volume of process gas using such a device and to be able to withdraw the same ...
Forced oscillations of the carbon dioxide concn. in a hydrogen feed were applied to the carbon dioxide methanation reaction with simultaneous gas phase and surface anal. The response of the gas phase and surface species to these repeated dynamic conditions ...
A review, with 9 refs., is given on trace element anal. by mass spectrometry (MS) and potentiometric stripping anal. (PSA). The key question of the problem is detn. of the structure of the samples (i.e. distribution functions and concns. of atoms, mols., c ...
We report on a novel gas spectrometry technique using pyroelectric thin-him arrays. The 1 x 50 element arrays of PZT are integrated onto silicon using a membrane structure. The experimental characterization of the pyroelectric elements shows both high volt ...
Measurements of anions and cations are reported for hydrocarbon and silane radio frequency capacitive glow discharges. Series of anions were observed by quadrupole mass spectrometry using power-modulated plasmas, and their structures are interpreted from t ...
Particle formation has been investigated experimentally from the initial molecular precursors up to the final micron-sized particles in a low pressure silane rf capacitive discharge. Neutrals and ions were studied by quadrupole mass spectrometry in power-m ...
A new ipn chromatographic method has been developed for the simultaneous analysis of the major matrix anions (chloride, nitrate, phosphate, sulfate, etc.), lower concentrated bromide, oxyhalides (iodate, chlorite, bromate) and nitrite in fresh waters and s ...
