Precursor, analysis using atmospheric

FIGURE I (A) An ESI source attached to a single quadrupole analyzer. The Instrument can be interfaced to an HPLC, CE or a syringe pump. The ionization is done at atmospheric pressure and the mass analysis in vacuum. This configuration is used for molecular weight determination. (B) An ESI source attached to a triple quadrupole analyzer. In a typical MS - MS experiment the precursor ion (Mp) is selected by the first analyzer (Ql), reacts with an inert gas in Q2 to yield the product ions (MI, M2, M3), and the product ions are analyzed by scanning Q3. This yields the product (fragment) ion spectrum. 

Fabrication of doped sol-gel silica films. Precursor solutions for sols were prepared by mixing tetraethoxysilane, ethanol and water with HCl as catalyst in the molar ratio 1 6 6 0.08, respectively. That is conventional procedure commonly used for silica sol-gel films preparation [4]. Cu-doped films were fabricated f romthe sols mixed with different amount (5-30 wt.%) of Cu(N03)2 by means of spincoating on a quartz substrate under the rotation speed 2000 rev/min. Films were heated at 500°C during 1 min in air. These films contain copper in the form of CuO that was established by the direct XRD analysis [5]. A heat treatment of the Cu-doped silica films in hydrogen atmosphere at 600 C for 1 h resulted in reduction of copper oxide to the finely dispersed metallic copper. 

---