Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Ivan Sekerka"'
Publikováno v:
International Journal of Environmental Analytical Chemistry. 63:153-165
Thallium is a highly toxic, under-studied priority element. However, it has recently created much interest due to afresh and rapid improvements in detection limit. It appears that there are no published T1 data for Great Lakes waters, likely due to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98b462e188293c7fc277d2713967ab7d
https://doi.org/10.1080/03067319608026261
https://doi.org/10.1080/03067319608026261
Publikováno v:
Journal of Great Lakes Research. 21:384-394
While being a highly toxic element, thallium (Tl) has been studied to a much lesser degree than other toxic elements such as lead, cadmium or mercury. This is mainly because Tl is often undetected by classical analytical methods which tend to have po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6b94142950d733021754cc3a462d9d0
https://doi.org/10.1016/s0380-1330(95)71049-8
https://doi.org/10.1016/s0380-1330(95)71049-8
Publikováno v:
International Journal of Environmental Analytical Chemistry. 53:13-27
This paper reports for the first time the application of a Laser-Excited Atomic Fluorescence Spectrometer (LEAFS) to study lead distribution in the Great Lakes waters. A class 100 clean laboratory for in-house work and a portable clean lab for field
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c41598c2a0be0ce0f6389ba16a06a875
https://doi.org/10.1080/03067319308045979
https://doi.org/10.1080/03067319308045979
Publikováno v:
Microchemical Journal. 47:345-350
A novel, simple and cost-effective method has been developed for tuning dye lasers used in laser-excited atomic fluorescence spectrometry. The method uses two common laboratory items-a pierced mirror and a commercial electrodeless discharge lamp (EDL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acb272e6eafb1b22151f59b782cc33dd
https://doi.org/10.1006/mchj.1993.1053
https://doi.org/10.1006/mchj.1993.1053
Publikováno v:
Analytica Chimica Acta. 269:129-136
A copper vapor laser-pumped dye laser was used in the development of a laser-excited atomic fluorescence spectrometer, which was optimized to give low-ng 1 −1 sensitivity. Using the spectrometer, a method was developed for direct determination of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7227cf3a81caa615a3121224d6398fd8
https://doi.org/10.1016/0003-2670(92)85142-s
https://doi.org/10.1016/0003-2670(92)85142-s
Publikováno v:
Journal of Analytical Atomic Spectrometry. 9:315
This paper describes a laser-excited atomic fluorescence spectrometric method for direct determination of lead in sea-waters down to femtogram levels. No separation/concentration steps nor chemical modifier were used. A programmable, in situ, known a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cbc319ab191c6888ad2ea9cad00476d
https://doi.org/10.1039/ja9940900315
https://doi.org/10.1039/ja9940900315
Autor:
Ivan Sekerka, Joseph F. Lechner
Publikováno v:
Analytical Letters. 9:1099-1110
The analytical behaviour of solid state, ion-selective electrodes based on silver or mercury sulfide, selenide, or telluride matrices was studied. As the active component, the chalcogenides of Cu, Pb, Cd, Zn, Ni, Co, and Bi for the cation electrodes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02b3ff33d6ef9f5994b3363263de17b4
https://doi.org/10.1080/00032717608059175
https://doi.org/10.1080/00032717608059175
Autor:
Milan Remko, Ivan Sekerka
Publikováno v:
Zeitschrift für Physikalische Chemie. 134:135-148
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bae39d8a8afb9fd8b21407134737a23
https://doi.org/10.1524/zpch.1983.134.2.135
https://doi.org/10.1524/zpch.1983.134.2.135
Publikováno v:
Collection of Czechoslovak Chemical Communications. 48:3214-3222
The PCILO quantum-chemical method with geometry optimization has been used to study rotation barriers of methyl groups in N-methylacetamide and N,N-dimethylacetamide. In all the cases studied, the eclipsed conformation have been found to be the most
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41de1c74af434f0985b6954a5b1c110a
https://doi.org/10.1135/cccc19833214
https://doi.org/10.1135/cccc19833214
Autor:
Ivan Sekerka, Milan Remko
Publikováno v:
Collection of Czechoslovak Chemical Communications. 52:1879-1887
The PCILO quantum chemical method was applied to the study of 1-[2-(2-methoxyphenylcarbamoyloxy)ethyl]piperidine (B), its cation (BH+), and hydrofluoride (BHF). For B and BH+, their principal hydration sites were established. Conformation maps of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73952f0ce6b8551c220334576e89aaaa
https://doi.org/10.1135/cccc19871879
https://doi.org/10.1135/cccc19871879