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  • sulfonic
  • Convenient and simple, sequential diazotization-iodination of aromatic amines with NaNO 2 /KI in the presence of a sulfonic acid based cation-exchange resin in water is an inexpensive, noncorrosive and eco-friendly synthetic route, that allows the preparation of various electron-rich and deficient iodoarenes in good yields. (organic-chemistry.org)
  • Chelex
  • Use of cation exchange resins, particularly Chelex-100, has been developed over the past few decades and enables preconcentration to yield, upon elution, measurable concentrations of trace metals. (lancs.ac.uk)
  • With the exception of recent equilibrium based studies Chelex is always used in an environment where the number of binding sites is in large excess compared to the number of competing cations, meaning competition effect are not significant, although kinetic factors are important is Chelex lability studies. (lancs.ac.uk)
  • This study aims to investigate the potential for an ion exchange resin (Chelex-100) to determine free ion concentrations by allowing the resin to equilibrate in situ with a natural water. (lancs.ac.uk)
  • ligand
  • The suitability of free ligand stability constants to resin binding and possible method developments are also discussed. (lancs.ac.uk)
  • separation
  • To keep the metal ion content (Na/H ratio) of the resin low enough to ensure successful separation of betaine, acid has to be added to either eluent (water) or vinasse. (lut.fi)
  • carboxylic
  • This is assumed to occur, because the amount of hydrogen bonds between the carboxylic groups of betaine and the resin decreases. (lut.fi)
  • The retention volume of choline increased as the Na/H ratio of the resin increased, because of the ion exchange reaction between choline cation and dissociated carboxylic group of the resin. (lut.fi)
  • Since the retention behavior of choline on the resin is opposite to the behavior of be-taine, the strong affinity of betaine towards hydrogen form WAC-resin has to be based on its carboxylic group. (lut.fi)
  • It is probable that the quaternary ammonium groups also affect the behavior of the carboxylic groups of betaine, causing them to form hydrogen bonds with the carboxylic groups of the resin. (lut.fi)
  • percentage
  • The removal percentage of the cations was examined by varying experimental conditions (such as pH of the hydrogen peroxide solution, temperature, contact time and dosage of adsorbent) in a stirred-batch system. (ac.ir)
  • equilibrium
  • ARTICLE: Determination of Free Ion Trace Metal Concentrations in Freshwaters Using Cation-Exchange Resin Equilibrium. (lancs.ac.uk)
  • The potential for IDA-resins to yield free-ion concentrations based on equilibrium-based sorption is a beneficial development that is currently being investigated. (lancs.ac.uk)
  • polymeric
  • Effects of experimental conditions on the yield of extracellular polymeric substances (EPSs) extraction by cation exchange resin (CER) were investigated using activated sludge flocs. (hindawi.com)
  • kinetics
  • However, it should be noted that the resin dose and the extraction time used in the previous studies were arbitrarily decided based on personal experiences, which did not account for the inherent process kinetics. (hindawi.com)
  • adsorption
  • A monovalent cation, Na+ was used to estimate the adsorption properties of both sulfonated and unsulfonated resin systems. (sljol.info)
  • The cations adsorption was studied on the basis of Langmuir, Freundlich and linear isotherms in the concentration range of 0-50 mg/L. Adsorption of the cations on the resin followed first-order, pseudo-first-order (Lagergren) and intraparticle diffusion kinetic models in the cations range of 10-20 mg/L. The best fitted model for kinetic model was obtained as Lagergren model. (ac.ir)
  • regeneration
  • It was found that the resulting ionic form of the resin is the same regardless of whether the regeneration acid is added to the eluent or the feed solution (vinasse). (lut.fi)
  • This type of fouling occurs from improper resin regeneration. (reskem.com)
  • suspended solids
  • Sample dilution is often required when an insufficient amount of sample is harvested or a relatively high dose of resin is needed for EPS extraction from suspended solids with a high concentration. (hindawi.com)
  • physical
  • the monomer's subunits are named according to their chemical composition, physical structure, and means of activation or curing, for example, acrylic resin, autopolymer resin. (thefreedictionary.com)
  • Glucose
  • In addition, catalytic effect of metal addition and WAC resin on glucose isomerization was investigated. (lut.fi)
  • hydrogen
  • When a WAC-resin is in hydrogen form, the retention time of betaine is the longest and betaine elutes as the last component of vi-nasse from the chromatographic column. (lut.fi)
  • Adsorptive Removal of Al, Zn, Fe, Cr and Pb from Hydrogen Peroxide Solution by IR-120 Cation Exchange Resin', Iranian Journal of Chemistry and Chemical Engineering (IJCCE) , 35(1), pp. 75-84. (ac.ir)
  • high
  • POROS XS resin maintains high resolution as linear flow rate increases. (thermofisher.com)
  • The KleenWater KW2510HT dishwasher filtration package includes one high temperature hot water filter, filter wrench, mounting bracket with screws and three resin softener filter cartridges. (waterfilterdeals.net)
  • purification
  • These resins are used for the purification of charged compounds, as well as for the removal of ionic molecules from solutions. (bio-rad.com)
  • form
  • As long as iron stays in the ferrous form, regenerating a softener with a salt brine solution will remove the iron off the resin. (reskem.com)
  • If you decide to have your resin tested, please contact us for our Resin Analysis Submittal Form so we can begin to identify the problem. (reskem.com)
  • typically
  • As several other researchers have demonstrated, four major factors are typically associated with the yield efficiency of EPS extraction, which include the resin dose, the extraction time, the intensity of stirring, and the sample volume (i.e., sample dilution). (hindawi.com)
  • Typically, this is the result of either reversible or non-reversible fouling of the cation and/or anion ion exchange resin. (reskem.com)
  • occurs
  • Once this occurs, regenerating the resin becomes more difficult which causes shorter service runs and reduces the resin life. (reskem.com)
  • consistent
  • These resins provide consistent and reproducible results. (bio-rad.com)
  • However, these data are consistent with WHAM modelled data indicating the trend of resin-metal binding during a deployment. (lancs.ac.uk)
  • Solution
  • These resins can also yield data on the speciation (by measuring lability) of a metal in solution by adjusting the contact time of the sample with the resin. (lancs.ac.uk)
  • consists
  • Stack Exchange network consists of 176 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. (stackexchange.com)
  • images
  • Scanning electronic microscopic (SEM) images were obtained to study the morphology of the resins produced. (sljol.info)