National Repository of Grey Literature 7 records found  Search took 0.01 seconds. 
Volatile species generation – an efficient sample introduction technique for ICP-MS
Musil, Stanislav
Various techniques of volatile species generation, the ways of coupling to ICP-MS and recent results of our laboratory in the field of photochemical vapor generation of transition metals were presented in this lecture.
GC-MS identification of photochemically generated volatile species of tungsten
Vyhnanovský, Jaromír ; Forczek, Sándor ; Musil, Stanislav
The presentation focused on the identification of volatile products of photochemical vapor generation of tungsten by GC-MS.
Photochemical vapor generation of rhenium with a detection by inductively coupled plasma mass spectrometry
Hašlová, Karolína ; Musil, Stanislav (advisor) ; Nováková, Eliška (referee)
This bachelor thesis deals with an optimization of the conditions of photochemical vapor generation of rhenium with detection by inductively coupled plasma mass spectrometry. Photochemical vapor generation was realized using an ultraviolet irradiation in a high-efficiency photochemical reactor with an inner reaction channel from a formic acid based medium in presence of reaction modifiers. Optimizations of parameters affecting the generation efficiency was implemented step by step - reaction medium flow rate (irradiation time), formic acid concentration, addition of acetic acid and reaction modifiers (transition metals) and carrier gas flow rate. The addition of an appropriate combination of reaction modifiers - cadmium(II) and iron(II) ions, had a key impact on photochemical generation of volatile species of Re and led to more than 40-fold increase in generation efficiency. A further (2-fold) increase in generation efficiency was achieved by wrapping the high-efficiency photochemical reactor with an aluminum foil, probably due to more efficient irradiation of the sample in the generator. The limit of detection and quantification were determined as 0.24 ng dm-3 and 0.80 ng dm-3 Re, respectively. The repeatability of the method 100 ng dm-3 Re was 4.8%. Key words photochemical vapor generation,...
Novel photochemical vapor generation of rhenium for its ultratrace determination
Vyhnanovský, Jaromír ; Hašlová, K. ; Musil, Stanislav
The presentation focused on novel photochemical vapor generation of rhenium. Details on optimization of generation conditions and other important parameters regarding this sensitive methodology, as well as its possible applications were pointed out and discussed.
Photochemical vapor generation of cobalt for detection by inductively coupled plasma mass spectrometry
Vyhnanovský, Jaromír ; Musil, Stanislav
Volatile species of cobalt were generated in a flow-injection system, employing a high-efficiency flow-through UV photoreactor and a formic acid based medium. Optimal generation conditions were found as 10% (v/v) formic acid and 4 mol/L ammonium formate at a flow rate of 4 ml/min.
Optimization of photochemical vapor generation of nickel with ICP-MS detection
Šoukal, Jakub ; Musil, Stanislav
Photochemical vapor generation of Ni has been investigated in detail using ICP-MS as the detector.
Optimization of photochemical vapor generation of molybdenum as a sample introduction for ICP-MS
Šoukal, Jakub ; Musil, Stanislav
Conditions of photochemical vapor generation of molybdenum with ICP-MS detection have been in detail investigated.