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Anion exchange resin

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https://www.readbyqxmd.com/read/28302978/determination-of-ultra-trace-metal-impurities-in-high-purity-cadmium-using-inductively-coupled-plasma-mass-spectrometry-after-matrix-separation-with-anion-exchange-resin
#1
Ayaka Wada, Naoko Nonose, Masaki Ohata, Tsutomu Miura
The analytical method for ultra-trace metal impurities at μg kg(-1) level in high-purity Cd was examined by inductively coupled plasma mass spectrometry (ICP-MS) combined with matrix separation by Bio-Rad AG MP-1M anion exchange resin. After the separation of Cd, the metal impurities such as Li, In, Cr, Mn, Fe, Co, Ni, Cu, Ga, Sr, Ba and Pb were measured by an ICP-quadrupole mass spectrometer (ICP-QMS) and ICP-sector field mass spectrometer (ICP-SFMS). From the comparison of measured results, it was evaluated that the analytical sensitivity by ICP-SFMS was 10 times higher than ICP-QMS...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28302975/chromatographic-separation-of-cd-from-plants-via-anion-exchange-resin-for-an-isotope-determination-by-multiple-collector-icp-ms
#2
Rongfei Wei, Qingjun Guo, Hanjie Wen, Marc Peters, Junxing Yang, Liyan Tian, Xiaokun Han
In this study, key factors affecting the chromatographic separation of Cd from plants, such as the resin column, digestion and purification procedures, were experimentally investigated. A technique for separating Cd from plant samples based on single ion-exchange chromatography has been developed, which is suitable for the high-precision analysis of Cd isotopes by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). The robustness of the technique was assessed by replicate analyses of Cd standard solutions and plant samples...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28286078/one-pot-synthesis-of-chitosan-grafted-quaternized-resin-for-the-removal-of-nitrate-and-phosphate-from-aqueous-solution
#3
H Thagira Banu, Sankaran Meenakshi
The present study deals with the synthesis of chitosan quaternized resin for efficient removal of nitrate and phosphate from aqueous solution. The resin was characterized with FTIR, SEM with EDX and XRD. Batch method was carried out to optimize various parameters such as contact time, initial concentration of nitrate and phosphate, dosage, pH, co-anions and temperature on the adsorption capacity of the adsorbent. The adsorption process illustrated that the Freundlich isotherm and the pseudo-second order are the best fitted models for the sorption of both anions...
March 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28272860/fabrication-of-stable-and-regenerable-amine-functionalized-magnetic-nanoparticles-mnfe2o4-sio2-nh2-as-a-potential-material-for-pt-iv-recovery-from-acidic-solutions
#4
D Harikishore Kumar Reddy, Wei Wei, Shuo Lin, Myung-Hee Song, Yeoung-Sang Yun
MnFe2O4@SiO2-NH2 magnetic nanocomposite (AFMNC) adsorbent with a particle size of ~50 nm was successfully synthesized using a facile approach. The as-prepared composite particles showed a fast binding of Pt(IV) with easy magnetic solid-liquid separation. The kinetic data were fitted to both pseudo-first and pseudo-second-order rate models, indicating that AFMNC exhibited a much higher rate of Pt(IV) binding (0.125 g mg-1 min-1) compared with commercial ion exchange resin Amberjet 4200 (0.0002 g mg-1 min-1)...
March 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28260627/purification-of-foot-and-mouth-disease-virus-by-heparin-as-ligand-for-certain-strains
#5
Ping Du, Shiqi Sun, Jinjie Dong, Xiaoying Zhi, Yanyan Chang, Zhidong Teng, Huichen Guo, Zaixin Liu
The goal of this project was to develop an easily operable and scalable process for the recovery and purification of foot-and-mouth disease virus (FMDV) from cell culture. Heparin resins HipTrap Heparin HP and AF-Heparin HC-650 were utilized to purify FMDV O/HN/CHA/93. Results showed that the purity of AF-Heparin HC-650 was ideal. Then, the O/HN/CHA/93, O/Tibet/CHA/99, Asia I/HN/06, and A/CHA/HB/2009 strains were purified by AF-Heparin HC-650. Their affinity/virus recoveries were approximately 51.2%/45.8%, 71...
April 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28259813/integrated-bicarbonate-form-ion-exchange-treatment-and-regeneration-for-doc-removal-model-development-and-pilot-plant-study
#6
Yue Hu, Treavor H Boyer
The application of bicarbonate-form anion exchange resin and sodium bicarbonate salt for resin regeneration was investigated in this research is to reduce chloride ion release during treatment and the disposal burden of sodium chloride regeneration solution when using traditional chloride-form ion exchange (IX). The target contaminant in this research was dissolved organic carbon (DOC). The performance evaluation was conducted in a completely mixed flow reactor (CMFR) IX configuration. A process model that integrated treatment and regeneration was investigated based on the characteristics of configuration...
February 8, 2017: Water Research
https://www.readbyqxmd.com/read/28259735/ion-exchange-resins-as-additives-for-efficient-protein-refolding-by-dialysis
#7
Jakub Gabrielczyk, Hans-Joachim Jördening
The most significant drawback of bacterial protein production involving inclusion bodies is the subsequent refolding into bioactive form. Implementation of refolding operations in large-scale applications often fails due to low yields and/or low product concentrations. This paper presents a simple method of integrated refolding by dialysis and matrix assisted refolding that combines advantages of both methods, high product concentrations and high refolding yields. Ion exchange resins (IER) and size exclusion media served as refolding additives and were added to solubilized protein prior to refolding by continuous exchange of dialysis buffer...
March 1, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28254576/effect-of-short-term-alkaline-intervention-on-the-performance-of-buffer-free-single-chamber-microbial-fuel-cell
#8
Na Yang, Yueping Ren, Xiufen Li, Xinhua Wang
Anolyte acidification is a drawback restricting the electricity generation performance of the buffer-free microbial fuel cells (MFC). In this paper, a small amount of alkali-treated anion exchange resin (AER) was placed in front of the anode in the KCl mediated single-chamber MFC to slowly release hydroxyl ions (OH(-)) and neutralize the H(+) ions that are generated by the anodic reaction in two running cycles. This short-term alkaline intervention to the KCl anolyte has promoted the proliferation of electroactive Geobacter sp...
June 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28254029/adsorptive-removal-of-antibiotics-from-water-using-magnetic-ion-exchange-resin
#9
Tianyue Wang, Xun Pan, Weiwei Ben, Jianbing Wang, Pin Hou, Zhimin Qiang
The occurrence of antibiotics in the environment has recently raised serious concern regarding their potential threat to aquatic ecosystem and human health. In this study, the magnetic ion exchange (MIEX) resin was applied for removing three commonly-used antibiotics, sulfamethoxazole (SMX), tetracycline (TCN) and amoxicillin (AMX) from water. The results of batch experiments show that the maximum adsorption capacities on the MIEX resin for SMX, TCN and AMX were 789.32, 443.18 and 155.15μg/mL at 25°C, respectively, which were 2-7 times that for the powdered activated carbon...
February 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28242203/separation-of-saccharides-from-prehydrolysis-liquor-of-lignocellulose-to-upgrade-dissolving-pulp-mill-into-biorefinery-platform
#10
Guoyu Tian, Yingjuan Fu, Jingshun Zhuang, Zhaojiang Wang, Qun Li
In this work, a competitive process consisting of polyelectrolyte flocculation, active carbon absorption, and ion exchange was developed for hemicelluloses-derived saccharides (HDSs) purification from prehydrolysis liquor (PHL) of lignocellulose. Results showed that colloidal lignin counted for 20% of non-saccharide compounds (NSCs) and could be eliminated by flocculation at 500mg/L polyaluminium chloride and 50mg/L anionic polyacrylamide. Active carbon was very effective for decoloration of flocculation-treated PHL, but showed limited absorption selectivity toward NSCs...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28224244/preparation-of-magnetic-melamine-formaldehyde-resin-and-its-application-to-extract-nonsteroidal-anti-inflammatory-drugs
#11
Shu-Wen Xue, Jing Li, Li Xu
Magnetic melamine-formaldehyde resin was prepared via water-in-oil emulsification approach by entrapping Fe3O4 magnetic nanoparticles as the core. The preparation of the magnetic resin was optimized by investigating the amount of polyethylene glycol 20000 and Fe3O4 nanoparticles, the concentration of the catalyst (hydrochloric acid), as well as the mechanical stirring rate. The prepared material was characteristic of excellent anion-exchange capacity, good water wettability, and proper magnetism. Its application was demonstrated by magnetic solid-phase extraction of nonsteroidal anti-inflammatory drugs coupled to high performance liquid chromatography-UV analysis...
February 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28223080/novel-process-combining-anaerobic-aerobic-digestion-and-ion-exchange-resin-for-full-recycling-of-cassava-stillage-in-ethanol-fermentation
#12
Xinchao Yang, Ke Wang, Huijun Wang, Jianhua Zhang, Zhonggui Mao
A novel cleaner ethanol production process has been developed. Thin stillage is treated initially by anaerobic digestion followed by aerobic digestion and then further treated by chloride anion exchange resin. This allows the fully-digested and resin-treated stillage to be completely recycled for use as process water in the next ethanol fermentation batch, which eliminates wastewater discharges and minimizes consumption of fresh water. The method was evaluated at the laboratory scale. Process parameters were very similar to those found using tap water...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28222952/esters-production-via-carboxylates-from-anaerobic-paper-mill-wastewater-treatment
#13
Carlos I Cabrera-Rodríguez, Mónica Moreno-González, Florence A de Weerd, Vidhvath Viswanathan, Luuk A M van der Wielen, Adrie J J Straathof
This paper describes a new option for integrated recovery and esterification of carboxylates produced by anaerobic digestion at a pH above the pKa. The carboxylates (acetate, propionate, butyrate, valerate and lactate) are recovered using a strong anion exchange resin in the bicarbonate form, and the resin is regenerated using a CO2-expanded alcohol technique, which allows for low chemicals consumption and direct esterification. Paper mill wastewater was used to study the effect of pH and the presence of other inorganic anions and cations on the adsorption and desorption with CO2-expanded methanol...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28194960/method-for-noninvasive-analysis-of-proteins-and-small-molecules-from-ancient-objects
#14
Marcello Manfredi, Elettra Barberis, Fabio Gosetti, Eleonora Conte, Giorgio Gatti, Clara Mattu, Elisa Robotti, Gleb Zilberstein, Igor Koman, Svetlana Zilberstein, Emilio Marengo, Pier Giorgio Righetti
Proteins and small molecules from ancient objects and cultural heritage can provide key information and contribute to study the context of objects and artists. However, all present-day protocols and strategies for the analysis of ancient samples are often invasive and require microsampling. Here, we present a new method for the noninvasive analysis of proteins and small molecules: the technique uses a special ethyl-vinyl acetate film functionalized with strong cation/anion exchange and C8 resins, for interacting with both proteins and small molecules present on the surface of the objects, followed by LC-MS/MS analysis...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28190834/perchlorate-selectivity-of-anion-exchange-resins-as-evaluated-using-ion-selective-electrodes
#15
Kenji Yamamoto, Shin'ya Mitsuda, Naomi Ohtake, Natsuki Murashige, Satoshi Ohmuro, Akio Yuchi
The selectivity coefficients reported for perchlorate of the high selectivity on anion exchange resins (AXRs) have not been consistent with one another. Possible errors by the unique use of four parameters (concentrations of two anions in two phases) were experimentally verified. The concentrations of perchlorate buffered at low levels (10(-6) - 10(-4) mol L(-1)) by two forms of AXRs were successfully determined by potentiometry with a perchlorate ion-selective electrode. This gave reasonable coefficients. The coefficients for perchlorate on several AXRs were independent of the relative exchange (RE), in contrast to the previous reports...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28169514/tracking-the-superefficient-anion-exchange-of-a-dynamic-porous-material-constructed-by-ag-i-nitrate-and-tripyridyltriazole-via-multistep-single-crystal-to-single-crystal-transformations
#16
Cheng-Peng Li, Bo-Lan Liu, Lei Wang, Yue Liu, Jia-Yue Tian, Chun-Sen Liu, Miao Du
To avoid the instability and inefficiency for anion-exchange resins and layered double-hydroxides materials, we present herein a flexible coordination network [Ag(L(243))](NO3)(H2O)(CH3CN) (L(243) = 3-(2-pyridyl)-4-(4-pyridyl)-5-(3-pyridyl)-1,2,4-triazole) with superefficient trapping capacity for permanganate, as a group-7 oxoanion model for radiotoxic pertechnetate pollutant. Furthermore, a high-throughput screening strategy has been developed based on concentration-gradient design principle to ascertain the process and mechanism for anion exchange...
March 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28149527/high-performance-of-a-unique-mesoporous-polystyrene-based-adsorbent-for-blood-purification
#17
Jian Chen, Wenyan Han, Jie Chen, Wenhui Zong, Weichao Wang, Yue Wang, Guanghui Cheng, Chunran Li, Lailiang Ou, Yaoting Yu
A multi-functional polystyrene based adsorbent (NKU-9) with a unique mesoporous and a high surface area was prepared by suspension polymerization for removal of therapeutic toxins in blood purification. The adsorbent produced had an almost equal amount of mesopore distribution in the range from 2 to 50 nm. The adsorption of serum toxins with different molecular weights were examined by in vitro adsorption assays and compared with some clinical currently used adsorbents such as HA-330, Cytosorb and BL-300 which are produced by China, America and Japan, respectively...
February 2017: Regenerative Biomaterials
https://www.readbyqxmd.com/read/28126572/adsorption-performance-of-salicylic-acid-on-a-novel-resin-with-distinctive-double-pore-structure
#18
Guqing Xiao, Ruiming Wen, Aijiao Liu, Guowen He, Dan Wu
Two approaches were used to synthesize two resins with different pore structures. In one way, the CH2Cl groups in macroporous chloromethylated polystyrene resin were transformed to methylene bridges, and achieved a hypercrosslinked resin with plentiful micropores (denoted GQ-06). In the other way, 50% of the CH2Cl groups in chloromethylated polystyrene resin was used to produce micropores, while the residual 50% of the CH2Cl groups was reacted with 2-aminopyridine, and prepared another resin with double pore structure of hypercrosslinked resin and macroporous resin (denoted GQ-11)...
May 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28109126/a-step-wise-approach-to-define-binding-mechanisms-of-surrogate-viral-particles-to-multi-modal-anion-exchange-resin-in-a-single-solute-system
#19
Matthew Brown, Sarah Johnson, Kurt Brorson, Scott Lute, David Roush
Multi-modal anion exchange resins combine properties of both anion exchange and hydrophobic interaction chromatography for commercial protein polishing and may provide some viral clearance as well. From a regulatory viral clearance claim standpoint, it is unclear if multi-modal resins are truly orthogonal to either single-mode anion exchange or hydrophobic interaction columns. To answer this, a strategy of solute surface assays and High Throughput Screening of resin in concert with a scale-down model of large scale chromatography purification was employed to determine the predominant binding mechanisms of a panel of bacteriophage (i...
January 21, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28105864/expression-and-purification-of-l-asparaginase-from-escherichia-coli-and-the-inhibitory-effects-of-cyclic-dipeptides
#20
Yanan Zhang, Dan Li, Yan Li
L-asparaginase, a key enzyme involved in nitrogen metabolism, is an effective anti-tumour agent. Cyclic dipeptides, a group of compounds, contain several important biological functions. In this paper, we proposed a novel method for L-asparaginase expression and purification from Echerichia coli and determined the effect of cyclic dipeptides on the enzymatic activity of recombinant L-asparaginase. The gene ansB encoding L-asparaginase was amplified from the genome of E. coli BL21 (DE3) by polymerase chain reaction and sub-cloned into pET-15b vector to construct expressing plasmid pET-15b-ansB...
January 20, 2017: Natural Product Research
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