A mass spectrometric study of several para-substituted benzylidenecyanoacetamides was performed; thus, electron impact, chemical ionization and fast atom bombardment mass spectrometric studies for each molecule were acquired and then compared in order to establish a general fragmentation pattern. In
Relative volatility of borosilicate glasses: a mass spectrometric study
β Scribed by I. Yu. Archakov; V. L. Stolyarova; M. M. Shultz
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 63 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0951-4198
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β¦ Synopsis
A high temperature Knudsen effusion method was used to study the composition of vapour and partial vapour pressures of species in multicomponent borosilicate glasses. Data on the activities of metaborates of alkali metals were obtained. Using an acid-base concept the relative volatility of these glasses was compared and discussed.
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The vaporization behavior of boron phosphate has been studied by using Knudsen effusion mass spectrometry. The vapor over BPO 4 consists of B 2 O 3 , P 4 O 10 , PO 2 , BPO 4 (platinum cell) and B 2 O 3 , PO, PO 2 , BPO 3 , BPO 4 (molybdenum cell). Standard enthalpies of formation and atomization (kJ