Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Emil G. Siegmund"'
Publikováno v:
Rapid Communications in Mass Spectrometry. 7:1070-1076
Previous studies using the ion trap as a potential replacement for an array of element-sensitive detectors indicated that only semi-quantitative results at the 50–100 ppb range could be obtained for 245 pesticides because of interfering endogenous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e6efabdb89603110a0673f2601512d9
https://doi.org/10.1002/rcm.1290071203
https://doi.org/10.1002/rcm.1290071203
Publikováno v:
Journal of AOAC INTERNATIONAL. 76:306-312
The electron ionization (El) and chemical ionization (CI) mass spectra of 12 representative testosterone esters were examined to explore the various analytical options available for identification and confirmation of the esters. Using El, a number of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e8f4ad0ddba1d094493f5df9bc6d806
https://doi.org/10.1093/jaoac/76.2.306
https://doi.org/10.1093/jaoac/76.2.306
Publikováno v:
Rapid Communications in Mass Spectrometry. 6:449-453
Ion-trap chemical-ionization performance has been improved by application of a modified scan function for the rejection of the undesired electron-ionization-like (EI-like) ions formed at the beginning of the reaction ionization period. The net effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b81972306f89626b9b727f6dc7783c25
https://doi.org/10.1002/rcm.1290060709
https://doi.org/10.1002/rcm.1290060709
Publikováno v:
Rapid Communications in Mass Spectrometry. 6:331-338
Examination of the methane chemical ionization (CI) spectra produced in an ion trap under automatic reaction control has revealed a strong concentration dependence phenomenon even at trace levels (ppm). The spectra produced during the elution profile
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57097ea4d65093a10a8b54e61eba481d
https://doi.org/10.1002/rcm.1290060504
https://doi.org/10.1002/rcm.1290060504
Autor:
Emil G. Siegmund, Thomas Cairns
Publikováno v:
Critical Reviews in Food Science and Nutrition. 30:397-402
With the recent proliferation of mass spectrometric methods available for the identification and confirmation of various compounds in different environmental matrices, it is timely to address the criteria desirable in a regulatory sample case. The em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c61469b725e0244a7ec76bd017beb52
https://doi.org/10.1080/10408399109527550
https://doi.org/10.1080/10408399109527550
Publikováno v:
Rapid communications in mass spectrometry : RCM. 7(11)
The ion trap has been demonstrated to be able to detect and quantify 245 target pesticides extracted via the Luke method while providing concurrent confirmation of presence via full scan data at the sub-ppm level. The precision and accuracy of the an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdadf7bd54b8b87d919d77eea5219dd
https://pubmed.ncbi.nlm.nih.gov/8280916
https://pubmed.ncbi.nlm.nih.gov/8280916
Autor:
Thomas Cairns, Emil G. Siegmund
Publikováno v:
ACS Symposium Series ISBN: 9780841217409
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f19d76977aa1f7258496d9bf7f331b2
https://doi.org/10.1021/bk-1990-0420.ch001
https://doi.org/10.1021/bk-1990-0420.ch001
Autor:
Thomas Cairns, Emil G. Siegmund
Publikováno v:
ACS Symposium Series ISBN: 9780841217409
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23d71375856337e12347f302be8f756f
https://doi.org/10.1021/bk-1990-0420.ch003
https://doi.org/10.1021/bk-1990-0420.ch003
Publikováno v:
Rapid communications in mass spectrometry : RCM. 4(2)
During regulatory analyses for the determination of pesticide residues on agricultural commodities, a frequently encountered trichlorinated compound was misidentified by the NBS library search routine. This case history illustrates the need for more
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9c4b5350f7448db12cd59c28bdba719
https://pubmed.ncbi.nlm.nih.gov/2134339
https://pubmed.ncbi.nlm.nih.gov/2134339
Publikováno v:
Pharmaceutical Research. :126-129
Analytical difficulties involved in the detection of a wide range of suspected polar and nonpolar drugs in botanical matrices have been solved by adopting a multipronged approach. Preliminary screening of Chinese herbal medications can be accomplishe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::951aa2a984850fa143b487870318a3b6
https://doi.org/10.1023/a:1016414918806
https://doi.org/10.1023/a:1016414918806