Zobrazeno 1 - 10
of 11
pro vyhledávání: '"R W Stringham"'
Autor:
Y K, Ye, R W, Stringham
Publikováno v:
Journal of Chromatography A. 927:47-52
The use of acidic mobile phase additives allows the chiral separation of underivatized phenylalanine analogs on a common amylosic column. In addition to decreasing retention and band-broadening arising from non-ideal interactions, acidic additives ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87d0603ee80e2952b34ef3d0c4a88d58
https://doi.org/10.1016/s0021-9673(01)01060-3
https://doi.org/10.1016/s0021-9673(01)01060-3
Autor:
J. A. Blackwell, R. W. Stringham
Publikováno v:
Chromatographia. 46:301-308
Linear solvation energy relationships (LSERs) are used to probe the changes in mobile and stationary phase properties of a carbon dioxide-based mobile phase and a polymeric stationary phase under near-critical conditions. Four mobile phase modifiers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c94d3bcb5ccb2376a4f6899baea0e9d
https://doi.org/10.1007/bf02496323
https://doi.org/10.1007/bf02496323
Autor:
J. A. Blackwell, R. W. Stringham
Publikováno v:
Chromatographia. 44:521-528
The temperature dependence on selectivity using modified carbon dioxide mobile phases with silica-based packed columns is found to be primarily related to the hydrogen bonding character of the analytes. Selectivity between hydrogen bond acceptor comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa150024bbaaa2f6b35138c6934ce9d7
https://doi.org/10.1007/bf02466746
https://doi.org/10.1007/bf02466746
Publikováno v:
Enantiomer. 6(6)
Atypically high selectivity (alpha2) chiral separations have been observed on Pirkle type supports. These separations were examined in terms of their response to various modifiers, thermodynamic behavior and LSER modeling. Atypical thermodynamic and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::032b5e74cf7f3c75d6d3466435f4df9f
https://pubmed.ncbi.nlm.nih.gov/11958343
https://pubmed.ncbi.nlm.nih.gov/11958343
Autor:
R P Martin, G George, D G Portterfield, M Riva, P J Sikes, M J Cannon, Allen Fox, V A Thorpe, K E Carr, G Drewery, R W Stringham, R L Smallidge, D Lowie, W J Bliss, E J Davis, J L Leseney, A R Hanks, David W. Fink, C L Foster, P G Brignac, A A Lawrence, H.C. Fink, F A Nichols, K R Baker, P Brunsmann, W Roozen
Publikováno v:
Journal of AOAC INTERNATIONAL. 65:52-61
A spectrophotometric analytical method for the determination of arprinocid [9-(2-chloro-6-fluorophenylmethyl)- 9H-purin-6-amine] in premixes has been evaluated in an interlaboratory collaborative study. The samples were prepared in pairs over the con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fffbfdc405132ced722339c51989797
https://doi.org/10.1093/jaoac/65.1.52
https://doi.org/10.1093/jaoac/65.1.52
Autor:
V J Meinen, W King, R Bolduc, L Schwamb, G M Gentry, P J Doherty, G A Wood, J B Fugere, Norman E. Skelly, W E Hodgins, A A Carlstrom, J E Launer, R W Stringham, Alan R Hanks, William R Betker, M J Bennett, A Burns, J P Minyard, Rodney J. Bushway, R S Freedlander, E Cuan, P D Jung, R L Polli, D Porterfield
Publikováno v:
Journal of AOAC INTERNATIONAL. 66:796-800
A collaborative study was conducted on a high performance liquid chromatographic (HPLC) method for determining rotenone in formulations. One liquid and 4 dust samples, containing other rotenoids and pesticides, with rotenone guarantees ranging from 0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f75fce1223fe0db90c65a9769c2f4e44
https://doi.org/10.1093/jaoac/66.3.796
https://doi.org/10.1093/jaoac/66.3.796
Autor:
E Hodgins, J Diuquid, J M Bajovich, Robert B Grorud, R L Bath, J L Counts, John E Forrette, J L Billings, B E Foster, Timothy S. Stevens, J B Vernetti, R W Stringham
Publikováno v:
Journal of AOAC INTERNATIONAL. 67:837-839
A liquid chromatographic method for any liquid mixture of the 3 herbicides 2,4-D, MCPP, and dicamba, found in commercial formulations, has been collaboratively studied. Each collaborator received 4 samples, 3 of which were ternary formulations and on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77bb60d5c39684e3598c466d603cdd19
https://doi.org/10.1093/jaoac/67.4.837
https://doi.org/10.1093/jaoac/67.4.837
Autor:
R W, Stringham, F E, Regnier
Publikováno v:
Journal of chromatography. 409
Bovine immunoglobulin Gl (IgGl) was purified from blood serum by isocratic elution through a mixed-bed ion-exchange column at low ionic strength. Selection of a mobile phase pH near the isoelectric point of IgG precluded its binding to the strong cat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c2c7da453f9d6471dcf8d95a8edcedfe
https://pubmed.ncbi.nlm.nih.gov/3693486
https://pubmed.ncbi.nlm.nih.gov/3693486
Autor:
C C, Gehrig, R W, Stringham
Publikováno v:
Journal - Association of Official Analytical Chemists. 70(6)
Cholecalciferol (vitamin D3) is extracted in acetonitrile on a Goldfisch apparatus, diluted to volume, and determined by reverse phase liquid chromatography (LC). The sum of the peak heights of pre-vitamin D3 and cis-vitamin D3 is used for quantitati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::72ba8c6b5e3a5db7fe65ae228b243330
https://pubmed.ncbi.nlm.nih.gov/2830223
https://pubmed.ncbi.nlm.nih.gov/2830223
Publikováno v:
Journal - Association of Official Analytical Chemists. 65(4)
Sulfonamide drugs are extracted from feed and feed premixes by shaking with 0.15N HCl in 25% methanol. The extract is diluted, clarified, and chromatographed on a reverse phase C18 column. Mobile phases used are methanol-2% acetic acid (35 + 65) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::06db6c9c4edf2c3e8663f21c00278d5e
https://pubmed.ncbi.nlm.nih.gov/7118788
https://pubmed.ncbi.nlm.nih.gov/7118788