Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Bernhard Mayer-Helm"'
Autor:
Madeleine Werneth, Hanspeter Kählig, Georg Pour, Herwig Stepan, Stefan Pummer, Ludwig Hofbauer, Maria-Theres Weber, Jutta Pani, Bernhard Mayer-Helm
Publikováno v:
Journal of chromatographic science. 59(9)
The carcinogenic compound N-nitrososarcosine (NSAR) is found in foods and tobacco products, and its quantification is of great interest. Although the presence of two stereoisomers, E- and Z-NSAR, is well-known, individual investigation of the isomers
Autor:
Herwig Stepan, Madeleine Werneth, Ludwig Hofbauer, Stefan Pummer, Bernhard Mayer-Helm, Maria-Theres Weber, Jutta Pani, Georg Pour
Publikováno v:
Chromatographia. 78:675-681
Ethyl carbamate occurs not only in a wide range of alcoholic beverages and fermented foods such as bread, yoghurt, or soy sauce but also in fruit and vegetable juices. Apart from that, traces of ethyl carbamate have been found in tobacco smoke and sm
Autor:
Bernhard Mayer-Helm
Publikováno v:
Journal of Chromatography A. 1216:8953-8959
A method using reversed phase liquid chromatography–electrospray ionization–tandem mass spectrometry was developed for the determination of 52 pesticides in tobacco. The influence of mobile phase additives was investigated to improve sensitivity
Publikováno v:
Talanta. 74:1184-1190
A method was developed for the quantitative determination of alachlor, benalaxyl, clomazone, diflubenzuron, dimethomorph, diphenamid, ethofumesate, metalaxyl, methoprene, metobromuron and piperonyl butoxide on tobacco. The pesticides were extracted w
Publikováno v:
Journal of mass spectrometry : JMS. 45(7)
The mass spectrometric behavior of four pairs of stereoisomers was investigated by liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS). The E- and Z-isomers of the pesticides chlorfenvinphos, dimethomorph, mevinphos and phosph