Results 181 to 190 of about 3,384 (221)
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Degradation and Isotope Source Tracking of Glyphosate and Aminomethylphosphonic Acid
Journal of Agricultural and Food Chemistry, 2016Glyphosate [N-(phosphonomethyl) glycine], an active ingredient of the herbicide Roundup, and its main metabolite, aminomethylphosphonic acid (AMPA), have been frequently reported to be present in soils and other environments and thus have heightened public concerns on their potential adverse effects.
Hui, Li, Sunendra R, Joshi, Deb P, Jaisi
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A Novel Synthesis of Aminomethylphosphonic Acid
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1972Abstract Aminomethylphosphonic acid, H2NCH2P(O) (OH)2, was prepared in high yield from t-butylaminomethylphosphonic acid, t-C4H9NHCH2P(O) (OH)2, by iso-buty-lene elimination in concentrated aqueous hydrobromic or hydrochloric acid at 175° in a sealed tube.
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Comments on the Synthesis of Aminomethylphosphonic Acid
Synthesis, 1989Two simple methods for the synthesis of aminomethylphosphonic acid from phosphorus (III) chloride and 1,3,5-triacylhexahydro-1,3,5-triazine or N-(hydroxymethyl) benzamide are ...
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A Convenient Synthesis of Aminomethylphosphonous Acid
Synthetic Communications, 1989Abstract Aminomethylphosphonous acid has been prepared in exellent yield by alkylation of bis(trimethylsilyl) ethoxycarbonylphosphonite 2 with N-(bromomethyl)phthalimide 1, followed by acidic removal of protecting groups.
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ChemInform Abstract: A Convenient Synthesis of Aminomethylphosphonic Acid.
Chemischer Informationsdienst, 1986AbstractDie im Titel genannte Verbindung (III) wird in guten Ausbeuten durch Erwärmen des Benzamids (I) mit Phosphortrichlorid und Trimethylphosphit und nachfolgende saure Hydrolyse des Phosphonats (II) erhalten.
M. J. PULWER, T. M. BALTHAZOR
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ChemInform Abstract: Substituted Aminomethylphosphonic Acids and Their Esters.
Chemischer Informationsdienst, 1986AbstractDas Bis‐oxazolidinyl‐p‐xylol (I) reagiert mit phosphoriger Säure bzw. Dialkylphosphiten (II) zu der Bis‐phosphonsäure (IIIa) bzw. den Estern (IIIb) und (IIIc), die sich auch durch Aminomethylierung von (II) mit Bis‐(β‐hydroxyethylamino)‐p‐xylol (IV) und Formaldehyd darstellen lassen.
E. E. NIFANT'EV +4 more
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Journal of Chromatography A, 2008
A capillary electrophoresis (CE) method coupled with electrochemiluminescence (ECL) detection for the analysis of glyphosate (GLY) and its major metabolite aminomethylphosphonic acid (AMPA) is presented. Complete separation of GLY and AMPA was achieved in 8 min using a background electrolyte of 20 mM sodium phosphate (pH 9.0) and a separation voltage ...
Hsien-Yi, Chiu +3 more
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A capillary electrophoresis (CE) method coupled with electrochemiluminescence (ECL) detection for the analysis of glyphosate (GLY) and its major metabolite aminomethylphosphonic acid (AMPA) is presented. Complete separation of GLY and AMPA was achieved in 8 min using a background electrolyte of 20 mM sodium phosphate (pH 9.0) and a separation voltage ...
Hsien-Yi, Chiu +3 more
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Adsorption Of Aminomethylphosphonic Acids On The Calcium Sulfate Dihydrate Crystal Surface
SPE Oilfield and Geothermal Chemistry Symposium, 1979Abstract The adsorption of four phosphonic acids an the calcium sulfate dehydrate crystal surface has been studied as a function of pH. Tendencies toward adsorption increase as the pH of the solution is raised from 4 to 7, then level off or fall off as the pH is further increased from 7 to 9.
Sung-Tsuen Liu, David Griffiths
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Aminomethylphosphonic Acid and Glyphosate Adsorption onto Goethite: A Comparative Study
Environmental Science & Technology, 2004Glyphosate is a non-selective, broad spectrum, post-emergent herbicide widely used in weed control. Aminomethylphosphonic acid (AMPA) is one of the main products of biodegradation of glyphosate in natural systems before its ultimate mineralization and also the breakdown product of more complex phosphonates such as nitrilotris-(methylenephosphonic acid).
B C, Barja, M, Dos Santos Afonso
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Removal of glyphosate and aminomethylphosphonic acid from synthetic water by nanofiltration
Environmental Technology, 2017The removal of glyphosate and aminomethylphosphonic acid (AMPA) with synthetic water was carried out on a lab-scale nanofiltration unit using two membranes, NFX and NFW. The presence of humic acid and some inorganic matters (CaCl2 and NaCl) was tested in the experiment.
Jiang, Yuan +3 more
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