Zobrazeno 1 - 10
of 22
pro vyhledávání: '"M. C. Mehra"'
Publikováno v:
Chromatographia. 32:143-147
Comparative efficiencies of oxalic, dichloroacetic and sulfamic acids as eluents in ion chromatographic determination of ammonium ion, alkali ions and alkyl amines have been evaluated. In all cases these eluents compared favorably to the popular nitr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c804ecbfb1ef01adf7d5b52d1bb5c514
https://doi.org/10.1007/bf02325017
https://doi.org/10.1007/bf02325017
Autor:
C. Pelletier, M. C. Mehra
Publikováno v:
Analytical Sciences. 6:431-434
The anions H2PO2-, H2PO3- and H2PO4- along with Cl-, NO3- and SO42- have been simultaneously determined by single-column ion chromatography in an indirect ultraviolet detection mode. The analytical approach employs 4- amino-2-hydroxybenzoic acid as a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::613ebd89d9faa3c95814e8c9968c34d2
https://doi.org/10.2116/analsci.6.431
https://doi.org/10.2116/analsci.6.431
Publikováno v:
Mikrochimica Acta. 100:113-120
The eluent strengths of para, ortho and meta substituted hydroxy-, nitro-, amino- and sulfobenzoic acids in single column ion chromatographic separations of inorganic and organic anions have been evaluated and compared with benzoic acid.o-Sulfobenzoi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7e7d094b93e4a813c932bc0e74a0837
https://doi.org/10.1007/bf01244507
https://doi.org/10.1007/bf01244507
Autor:
M. C. Mehra, E. Landry
Publikováno v:
Fresenius' Journal of Analytical Chemistry. 351:584-586
2–3 and 2–4 pyridine dicarboxylic acids can be used as mobile phases for ion chromatographic analyses of anions in simple matrices. By selecting a specific reaction scheme or matrix elimination before the chromatographic step their use can be ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddb5200badb84f6e0857ae5c8daa4e04
https://doi.org/10.1007/bf00322738
https://doi.org/10.1007/bf00322738
Autor:
M. C. Mehra, C. Pelletier
Publikováno v:
Chromatographia. 30:337-338
The efficacity of 4-amino-2-hydroxybenzoic acids as an eluent for the separation and determination of uncommon anions has been evaluated. The intensely absorbing eluent (λmax 320 nm) offers a convenient indirect photometric approach to quantitate th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0af8cceb6d176f4a170678ccb869557d
https://doi.org/10.1007/bf02319719
https://doi.org/10.1007/bf02319719
Publikováno v:
Mikrochimica Acta. 84:61-68
An analytical procedure for the indirect determination of chromium at theμg level in aqueous samples has been developed. It involves the use of a novel chromogen 3-(2-pyridyl)-5,6 bis(5-(2 furyl disulfonic acid))-1,2,4-triazine disodium salt (Ferene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab27152d2c32f8a4429e4ca3bea67a70
https://doi.org/10.1007/bf01204157
https://doi.org/10.1007/bf01204157
Autor:
S. Matsuda, S. Imai, J. A. Vinson, Y. Ohmori, A. Kaniewski, T. Masuda, M. C. Mehra, Bal Krishan Puri, Y. Takagi
Publikováno v:
Bulletin of Environmental Contamination and Toxicology. 41:690-695
Evaluation of trace metals in human tissues such as hair and nails has proven useful in the studies pertaining to chronic body exposure. These have also been suggested as indexes to evaluate environmental exposure by toxic trace metals. Though hair h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::031d4f51f202aedf2752f8f2c1000d6f
https://doi.org/10.1007/bf02021020
https://doi.org/10.1007/bf02021020
Publikováno v:
Mikrochimica Acta. 73:455-464
A new spectrophotometric method for the determination of iron (III) after adsorption of its red TTA complex onto microcrystalline naphthalene has been developed. Iron(III) reacts with 2-thenoyltri-fluoroacetone in pH range 2.4–5.2 to form a water-i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65a78d92a8e0d857d140c7ed7a873c75
https://doi.org/10.1007/bf01196332
https://doi.org/10.1007/bf01196332
Autor:
P. O'Brien, M. C. Mehra
Publikováno v:
Mikrochimica Acta. 66:603-609
A Spectrophotometric method is presented for the microanalysis of analytically important thiosulfate and tetraphenylborate anions in an aqueous solution. The method is based on ligand exchange in a dynamic approach incorporating a solid reagent mercu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8717d283e09775f4081e121eb1050031
https://doi.org/10.1007/bf01220120
https://doi.org/10.1007/bf01220120
Publikováno v:
Bulletin of Environmental Contamination and Toxicology. 38:775-782
In a vast majority of cases solid municipal wastes are disposed through sanitary landfill operations. However, as water percolates through such wastes, it dissolves inorganic and organic components thereby producing contaminated leachates which may c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55b53eb197e7ea475b7e5298afd9eca6
https://doi.org/10.1007/bf01616700
https://doi.org/10.1007/bf01616700