Zobrazeno 1 - 10
of 33
pro vyhledávání: '"John C. Guyon"'
Autor:
Bryan Madison, John C. Guyon
Publikováno v:
Mikrochimica Acta. 63:133-144
The solvent extraction separation of thorium with tri-n-octyl-phosphine oxide was studied. Thorium was determined in gross quantities of uranium compounds using a two-cycle solvent extraction procedure in the presence of EDTA. Uranium was shown to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb3d744a5241759bfe5895e8d121210c
https://doi.org/10.1007/bf01271530
https://doi.org/10.1007/bf01271530
Autor:
John C. Guyon, Norman L. Trautwein
Publikováno v:
Mikrochimica Acta. 81:347-353
Simple, direct, and sensitive low temperature phosphorimetric methods for the determination of Chlorpropham, Propham, Propoxur, and Terbucarb in EPA solvent are described. The minimum detectable amounts are 0.01 p. p. m. for Chlorpropham and Propham
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43c9a629e62969269dacfcf7a94cf1fd
https://doi.org/10.1007/bf01196719
https://doi.org/10.1007/bf01196719
Autor:
John C. Guyon, Norman L. Trautwein
Publikováno v:
Mikrochimica Acta. 79:413-418
Simple, direct, and sensitive low temperature phosphorimetric methods for the determination of 2,4-D, 2-naphthoxyacetic acid, and Silvex in EPA solvent are described. The minimum detectable amounts are 0.1 p. p. m. for each pesticide. The ranges of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7aac5def9643b4f199698ca90de2726d
https://doi.org/10.1007/bf01204824
https://doi.org/10.1007/bf01204824
Autor:
Norman L. Trautwein, John C. Guyon
Publikováno v:
Analytical Letters. 16:969-977
Sensitive low temperature phosphorimetric methods for the determination of the pesticides Alachlor, Anilazine, Bromoxynil, and Dichlobenil in EPA solvent have been developed. The minimum detectable amounts are 0.08, 0.006, 0.2, and 0.006 p.p.m. for A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a84ee9442240d86cca4f2a55bba9c0e
https://doi.org/10.1080/00032718308067954
https://doi.org/10.1080/00032718308067954
Autor:
Norman L. Trautwein, John C. Guyon
Publikováno v:
Mikrochimica Acta. 78:393-398
Simple, direct, and sensitive low temperature phosphorimetric methods for the determination of monuron, diuron, and fenuron in EPA solvent are described. The minimum detectable amounts are 0.2, 0.1, and 0.02 p. p. m. for monuron, diuron, and fenuron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6ae95a346fda7bec9733c299d798122
https://doi.org/10.1007/bf01197988
https://doi.org/10.1007/bf01197988
Autor:
John C. Guyon, Norman L. Trautwein
Publikováno v:
Analytical Letters. 15:811-818
Sensitive low temperature phosphorimetric methods for the determination of the pesticides MCPA, 2,4,5-T, and 2,4,5-T-isopropyl ester in EPA solvent have been developed. The minimum detectable amounts are 0.1 p.p.m. for both 2,4,5-T formulations and 0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8390d258304c255fa83dfccf8840542
https://doi.org/10.1080/00032718208069515
https://doi.org/10.1080/00032718208069515
Publikováno v:
Mikrochimica Acta. 56:1180-1184
A very selective method has been developed for the determination ofμg quantities of fluoride based on the fluorescence quenching by fluoride of the zirconium-flavonol chelate. The fluorescence intensity is read at 460 nm. The reduction in fluorescen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9c830950b4717e14991e782bb3289f9
https://doi.org/10.1007/bf01224415
https://doi.org/10.1007/bf01224415
Autor:
Robert E. Neas, John C. Guyon
Publikováno v:
Analytical Chemistry. 41:1470-1473
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::125b1664fb6b4bd3ff5226a10d6fd370
https://doi.org/10.1021/ac60280a039
https://doi.org/10.1021/ac60280a039
Autor:
John C. Guyon, Dora E. Williams
Publikováno v:
Mikrochimica Acta. 60:194-197
A fluorimetric method for parts per billion concentrations of Samarium in the presence of other rare earth ions has been developed. The method utilizes a charge transfer complex between 1,1,1,5,5,5-hexafluoro-2,4-pentanedione and samarium in absolute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b5d37c37f01dc6c1959590fa0559878
https://doi.org/10.1007/bf01218331
https://doi.org/10.1007/bf01218331
Autor:
R. L. Heller, John C. Guyon
Publikováno v:
Analytical Chemistry. 40:773-776
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd1623ffdee9dfc9ccb0436d4c0e8a18
https://doi.org/10.1021/ac60260a023
https://doi.org/10.1021/ac60260a023