Search results for "SULFATE"

showing 10 items of 657 documents

LC of high to moderately polar basic drugs in urine with water and detergent, and direct injection

2016

Background: Micellar LC was first proposed as a ‘green’ mode using mobile phases of water and surfactant. However, in most procedures a small amount of organic solvent is required to decrease the retention to convenient values. Results & methodology: Mixed micellar mobile phases prepared with both cationic (sodium dodecyl sulphate) and nonionic surfactant (Brij-35) modulate the retention of high to moderately polar basic drugs to practical times, eliminating the need of organic solvent. While the mobile phase is continuously recycled through the system, the stationary phase performance is maintained after repetitive injection of the samples. Discussion & conclusion: Through an exte…

SodiumClinical Biochemistrychemistry.chemical_elementUrine010402 general chemistry01 natural sciencesPolyethylene GlycolsAnalytical ChemistrySurface-Active AgentsPulmonary surfactantLimit of DetectionPhase (matter)HumansGeneral Pharmacology Toxicology and PharmaceuticsMicellesChromatographyChemistryOrganic solvent010401 analytical chemistryCationic polymerizationSodium Dodecyl SulfateWaterGeneral Medicine0104 chemical sciencesMedical Laboratory TechnologyPharmaceutical PreparationsStationary phaseFlow Injection AnalysisPolarChromatography LiquidBioanalysis
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Comparison of adsorption equilibrium models and error functions for the study of sulfate removal by calcium hydroxyapatite microfibrillated cellulose…

2017

In the present study, the adsorption of sulfates of sodium sulfate (Na2SO4) and sodium lauryl sulfate (SLS) by calcium hydroxyapatite-modified microfibrillated cellulose was studied in the aqueous solution. The adsorbent was characterized using elemental analysis, Fourier transform infrared, scanning electron microscope and elemental analysis in order to gain the information on its structure and physico-chemical properties. The adsorption studies were conducted in batch mode. The effects of solution pH, contact time, the initial concentration of sulfate and the effect of competing anions were studied on the performance of synthesized adsorbent for sulfate removal. Adsorption kinetics indica…

SodiumInorganic chemistrychemistry.chemical_element02 engineering and technology010501 environmental sciencessulfate removal01 natural sciencesNanocellulosechemistry.chemical_compoundAdsorptionSodium sulfateSpectroscopy Fourier Transform InfraredEnvironmental ChemistryCelluloseSulfateCelluloseWaste Management and Disposalnanocellulose0105 earth and related environmental sciencesWater Science and TechnologyAqueous solutionSulfatesGeneral Medicinewater treatmentHydrogen-Ion Concentration021001 nanoscience & nanotechnologycalcium hydroxyapatiteSolutionsKineticsDurapatitechemistryChemical engineeringElemental analysisadsorptionThermodynamicsAdsorption0210 nano-technologyWater Pollutants ChemicalEnvironmental technology
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Thermoanalytical studies on sodium 1,2-naphthoqoinone oximesolfonates

1991

Abstract Five sodium 1,2-nitrosonaphtholsulfonatea were prepared or purified and their thermal behaviour studied by TG, DTG and DSC. Pyrolysis MS technique was used to identify evolved gases and FTIR to characterize residuals. The water contents depended on preparation and conservation. The decomposition was analysed in three stages which can be formed by one or more steps. The final product was sodium sulfate in air at 530 °C and the mixture of carbon and sodium sulfide at 950 °C in nitrogen. The structure effects on decomposition is discussed.

SodiumInorganic chemistrychemistry.chemical_elementCondensed Matter PhysicsDecompositionNitrogenSodium sulfidechemistry.chemical_compoundchemistrySodium sulfatePhysical and Theoretical ChemistryFourier transform infrared spectroscopyInstrumentationCarbonPyrolysisThermochimica Acta
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CCDC 809075: Experimental Crystal Structure Determination

2011

Related Article: K.Raatikainen, J.Huuskonen, K.Rissanen|2011|Dalton Trans.|40|5706|doi:10.1039/c1dt10406c

Space GroupCrystallography(3639-bis(((5'-Carboxy-22'-bipyridin-5-yl)carbonyl)amino)-42-(((5'-carboxylato-22'-bipyridin-5-yl)carbonyl)amino)-92031-triaza-11223-triazoniaheptacyclo[29.2.2.2^912^.2^2023^.1^37^.1^1418^.1^2529^]dotetraconta-3(42)4614(39)151725(36)2628-nonaene)-iron(ii) disulfate hexacosahydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1915747: Experimental Crystal Structure Determination

2019

Related Article: L. Tapmeyer, D. Prill|2019|IUCrData|4|x190689|doi:10.1107/S2414314619006898

Space GroupCrystallographyCrystal System(6-amino-5-azaniumyl-4-oxo-34-dihydropyrimidin-2(1H)-ylidene)ammonium sulfate monohydrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 978468: Experimental Crystal Structure Determination

2014

Related Article: Diana Dragancea, Sergiu Shova, Eva A. Enyedy, Martin Breza, Peter Rapta, Luca M. Carrella, Eva Rentschler, Anatolie Dobrov, Vladimir B. Arion|2014|Polyhedron|80|180|doi:10.1016/j.poly.2014.03.039

Space GroupCrystallographyCrystal System(mu~2~-2-(2-oxidobenzylidene)-N-((2-oxidophenyl)methylidene)hydrazinecarbohydrazonato)-aqua-bis(NN-dimethylformamide)-di-copper(ii) hydrogen sulfate monohydrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 915602: Experimental Crystal Structure Determination

2013

Related Article: Michael Giese, Markus Albrecht, Arto Valkonen, Kari Rissanen|2013|Eur.J.Org.Chem.|2013|3247|doi:10.1002/ejoc.201201704

Space GroupCrystallographyCrystal SystemCrystal Structure(Pentafluorobenzyl)(triphenyl)phosphonium hydrogen sulfate sulfuric acid hemihydrateCell ParametersExperimental 3D Coordinates
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CCDC 293618: Experimental Crystal Structure Determination

2007

Related Article: E.Aznar, S.Ferrer, J.Borras, F.Lloret, M.Liu-Gonzalez, H.Rodriguez-Prieto, S.Garcia-Granda|2006|Eur.J.Inorg.Chem.||5115|doi:10.1002/ejic.200600711

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters(mu~2~-Aqua)-bis(mu~2~-35-diamino-124-triazole)-tetraaqua-sulfato-di-copper(ii) sulfate hydrateExperimental 3D Coordinates
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CCDC 819696: Experimental Crystal Structure Determination

2012

Related Article: G.J.Merten, C.Neis, S.Stucky, V.Huch, E.Rentschler, H.Natter, R.Hempelmann, K.Stowe, K.Hegetschweiler|2012|Eur.J.Inorg.Chem.||31|doi:10.1002/ejic.201100914

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters2356-Tetrahydroxycyclohexane-14-diaminium sulfate monohydrateExperimental 3D Coordinates
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CCDC 171781: Experimental Crystal Structure Determination

2002

Related Article: E.Espinosa, M.Meyer, D.Berard, R.Guilard|2002|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|58|m119|doi:10.1107/S0108270101021060

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates((14811-tetraazacyclotetradeca-14811-tetrayl)tetraacetamide)-copper(ii) sulfate hydrate
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