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Journal articles on the topic 'EDTA complexes'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Zhang, Hua, Jacob P. Herman, Harvey Bolton, Zhicheng Zhang, Sue Clark, and Luying Xun. "Evidence that Bacterial ABC-Type Transporter Imports Free EDTA for Metabolism." Journal of Bacteriology 189, no. 22 (2007): 7991–97. http://dx.doi.org/10.1128/jb.01164-07.

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ABSTRACT EDTA, a common chelating agent, is becoming a major organic pollutant in the form of metal-EDTA complexes in surface waters, partly due to its recalcitrance to biodegradation. Even an EDTA-degrading bacterium, BNC1, does not degrade stable metal-EDTA complexes. In the present study, an ABC-type transporter was identified for possible uptake of EDTA because the transporter genes and the EDTA monooxygenase gene were expressed from a single operon in BNC1. The ABC-type transporter had a periplasmic-binding protein (EppA) that should confer the substrate specificity for the transporter; t

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2

Maragkou, Eleni, and Ioannis Pashalidis. "Investigations on the Interaction of EDTA with Calcium Silicate Hydrate and Its Impact on the U(VI) Sorption." Coatings 11, no. 9 (2021): 1037. http://dx.doi.org/10.3390/coatings11091037.

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The interaction of EDTA with calcium silicate hydrate (C-S-H) and its impact on the sorption of U(VI) by C-S-H in the presence of EDTA at varying concentrations has been investigated under N2 and ambient atmosphere. The solid phase characterization was performed by FTIR, XRD and TGA measurements and the uranium concentration in solution has been determined by alpha-spectroscopy. At increased EDTA concentrations ([EDTA] > 0.1 M) calcium is complexed and extensively extracted from the solid resulting in a quantitative dissolution of the Ca(OH)2 phase and deterioration of C-S-H. At lower EDTA

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3

Laan, Ramon G. W., Tona Verburg, H. Th Wolterbeek, and Jeroen J. M. de Goeij. "Photodegradation of Iron(III)-EDTA: Iron Speciation and Domino Effects on Cobalt Availability." Environmental Chemistry 1, no. 2 (2004): 107. http://dx.doi.org/10.1071/en04025.

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Environmental Context. Aquatic life requires access to sufficient nutrients and trace metals in the surrounding waters. Measuring the speciation (in solution or precipitated, free ionic or complexed) of trace metals is a traditional procedure to assess the potential of waters for life. Iron, an important nutrient, is relatively insoluble, and metal–ligand complexes are required to keep the iron in solution and bioavailable. Sunlight often degrades these metal–ligand complexes, and the subsequently released iron can outcompete other (trace) metals for their ligands. A ‘domino’ effect on weaker

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4

Palamarchuk, M. S., E. A. Shelestyuk, E. A. Tokar’, and A. M. Egorin. "Sorption of Complex Co(II)-EDTA by Anion Exchange Resin AB-17-8 from Model Deactivating Solutions Containing Fe(III)-EDTA." Ecology and Industry of Russia 24, no. 6 (2020): 20–23. http://dx.doi.org/10.18412/1816-0395-2020-6-20-23.

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The results of studies of the sorption of EDTA complexes with ions Co(II) and Fe(III) on anion exchange resin AB-17-8 used in mixed filters of special water treatment apparatus of NPP are presented. The character of the sorption process of complexes Co(II)-EDTA and Fe(III)-EDTA in acidic media depending on the pH and salt background of solutions simulating deactivating solutions formed after the dissolution of iron oxide compounds containing cobalt radionuclides was studied. It has been shown that upon deactivation of spent ion-exchanged resins with acid solutions of EDTA salts, the secondary

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5

Noguchi, Daisuke. "LANTHANIDE CONTRACTION IN CHELATES OF ETHYLENEDIAMINETETRAACETIC ACID BASED ON CRYSTALLOGRAPHIC DATA: A SHORT REVIEW." Ukrainian Chemistry Journal 89, no. 9 (2023): 14–34. http://dx.doi.org/10.33609/2708-129x.89.09.2023.14-34.

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The lanthanide (Ln) series has been attracted so much attention not only for its physical properties but also for its applications in organic synthesis and biomedical engineering. In the lanthanide chemistry, lanthanide contraction is a crucial concept meaning the gradual decrease in ionic radii as the atomic number of the Ln series increases. As a prominent chelator, ethylenediaminetetraacetic acid (EDTA) has been well-known to give stable complexes with various metals including Ln ions, resulted in forming (EDTA−4H)4− anion by deprotonation; over 100 kinds of Ln-EDTA complexes have hitherto

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6

Nowack, Bernd, and Laura Sigg. "Adsorption of EDTA and Metal–EDTA Complexes onto Goethite." Journal of Colloid and Interface Science 177, no. 1 (1996): 106–21. http://dx.doi.org/10.1006/jcis.1996.0011.

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7

Chatterjee, Debabrata, and Rudi van Edik. "Prospect of RuIII(edta) in Catalysis of Bicarbonate Reduction." Current Catalysis 9, no. 1 (2020): 23–31. http://dx.doi.org/10.2174/2211544708666190902124817.

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Reduction of carbon dioxide into formic acid using transition metal complexes as catalysts is a research area of abiding importance. Although ruthenium(II) complexes as ‘molecular catalysts’ have received much attention, use of ruthenium(III) complexes in the selective reduction of carbon dioxide into formic acid has recently been explored. This review focuses on the recent research progress in the use of a ruthenium(III) complex containing the ‘edta’ ligand (edta4- = ethylenediaminetetraacetate) as catalyst or mediator in the catalytic, electro-catalytic and photocatalytic conversion of bicar

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8

Narendar, Yeshwanth, and Gary L. Messing. "Effect of phase separation in metal carboxylate gels on perovskite lead magnesium niobate crystallization." Journal of Materials Research 14, no. 10 (1999): 3921–31. http://dx.doi.org/10.1557/jmr.1999.0531.

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Phase separation during the synthesis and decomposition of lead magnesium niobate (PMN)–ethylenediaminetetraacetic acid (EDTA) and PMN–citrate gels strongly affects perovskite Pb(Mg1/3Nb2/3)O3 phase formation. The PMN–EDTA gel was synthesized from a solution containing Pb–EDTA, Mg–EDTA, and peroxo–citrato–niobium complexes at pH 8. Pb–EDTA precipitation was avoided by using Pb:EDTA in the mole ratio >1:2.5 and flash pyrolyzing the PMN–EDTA solution at 225 °C. Consequently, the PMN yield increased from 80 to 98 wt%. The sequential decomposition of Pb–EDTA, Mg–EDTA, and peroxo–citrato–Nb in t

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9

Kovács, Attila, Dénes S. Nemcsok, and Tamás Kocsis. "Bonding interactions in EDTA complexes." Journal of Molecular Structure: THEOCHEM 950, no. 1-3 (2010): 93–97. http://dx.doi.org/10.1016/j.theochem.2010.03.036.

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10

Milesz, S., M. Jovchev, D. Schumann, V. A. Khalkin, and M. Milanov. "The EDTA complexes of astatine." Journal of Radioanalytical and Nuclear Chemistry Letters 127, no. 3 (1988): 193–98. http://dx.doi.org/10.1007/bf02164864.

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11

Paraneeiswaran, Arunachalam, Sudhir K. Shukla, V. S. Sathyaseelan, and Toleti Subba Rao. "A spectrophotometric method for the determination Co-EDTA complexes." International Journal of Applied Sciences and Biotechnology 3, no. 4 (2015): 584–87. http://dx.doi.org/10.3126/ijasbt.v3i4.13182.

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A precise quantification of Co(II)EDTA complex is required to develop bioremediation approaches for Co(III)EDTA complex that is generated in various industrial processes. It is cumbersome to quantify Co(II)EDTA in a mixture of Co(II)EDTAand Co(III)EDTAby normal UV-visible spectrophotometric methods as both the complexes absorb significantly at 490 nm, which is the λ max of Co(II)EDTA. Whereas other sophisticated techniques such as gas chromatography, atomic absorption spectrophotometer, inductively coupled plasma-atomic emission spectroscopy can measure individual species of Co(II)EDTA or Co(I

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12

Lewis, Kevin M., Chelsie L. Greene, Steven A. Sattler, Buhyun Youn, Luying Xun, and ChulHee Kang. "The Structural Basis of the Binding of Various Aminopolycarboxylates by the Periplasmic EDTA-Binding Protein EppA from Chelativorans sp. BNC1." International Journal of Molecular Sciences 21, no. 11 (2020): 3940. http://dx.doi.org/10.3390/ijms21113940.

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The widespread use of synthetic aminopolycarboxylates, such as ethylenediaminetetraacetate (EDTA), as chelating agents has led to their contamination in the environment as stable metal–chelate complexes. Microorganisms can transport free EDTA, but not metal–EDTA complexes, into cells for metabolism. An ABC-type transporter for free EDTA uptake in Chelativorans sp. BNC1 was investigated to understand the mechanism of the ligand selectivity. We solved the X-ray crystal structure of the periplasmic EDTA-binding protein (EppA) and analyzed its structure–function relations through isothermal titrat

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13

Schneider, André, Christophe Nguyen, and Laurence Denaix. "Estimation of the association and dissociation rate constants of Cd complexes with various aminopolycarboxylic acids by an exchange method." Environmental Chemistry 6, no. 4 (2009): 334. http://dx.doi.org/10.1071/en09053.

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Environmental context. Phytoremediation is a potential way to remove cadmium from polluted soils. The process of plant uptake of cadmium can be enhanced by the addition of chelating compounds. The ability of roots to effectively take up Cd when bound to these complexes is dependent on the speed at which the Cd is associated or dissociated (bound or unbound) from the complex. An exchange method is used here to estimate these association and dissociation rates for a series of Cd–aminopolycarboxylate complexes (some of which have been tested elsewhere in phytoextraction studies). The results of t

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14

Sun, Guida, Weiqiao Liu та Tilman Butz. "The Nuclear Quadrupole Interaction of 187W(β–)187Re in W(VI)-EDTA Complexes". Zeitschrift für Naturforschung A 57, № 6-7 (2002): 620–22. http://dx.doi.org/10.1515/zna-2002-6-761.

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The nuclear quadrupole interaction of 187W(β-)187Re in W(VI)-EDTA complexes at room temperature was determined by time differential perturbed angular correlations (TDPAC) to be VQ = 1270(8) MHz with an asymmetry parameter η= 0.403(4). While the coordination geometry of the Mo(VI)- EDTA complex is known, there appears to be none for the W-analogue. The rather similar asymmetry parameters for the 187W(β-)187Re in W(VI)-EDTA complex and for the 99Mo(β-)99Tc in Mo(VI)- EDTA complex, determined previously, supports the idea that the coordination geometries in the Moand W-complexes are similar

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15

Geng, Zilong, Hui Chen, Chenyu Yang, Qiang Shen, and Tao Wu. "Study of the diffusion of metals and metals-EDTA complexes in water by capillary method." E3S Web of Conferences 290 (2021): 01004. http://dx.doi.org/10.1051/e3sconf/202129001004.

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EDTA can complex with radionuclides (RNs) to form negatively charged complexes, making it difficult for clay minerals to retard the diffusion of RNs waste. The diffusion coefficient of RNs in water (Dw) is an important parameter for the safety assessment of the repository. In this study, the effectsof EDTA on the diffusion of metal ions (Cu2+, Sm3+, Nd3+, Lu3+ and Zn2+) were investigated by a capillary method. The experimental results showed that [Cu-EDTA]2-, [Sm-EDTA]-and [La-EDTA]-have higher Dw thanthe Mn+. Whereas, [Nd-EDTA]-and [Zn-EDTA]2- have lower Dw than Nd3+ and Zn2+ cations. The Dw

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16

Chatterjee, Debabrata. "Chemistry of Ru(edta) complexes relevant to oxidoreductase mimicking: a personal perspective." New Journal of Chemistry 44, no. 44 (2020): 18972–79. http://dx.doi.org/10.1039/d0nj04349d.

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17

Rajkovic, Milos. "Complexometric determination: Part I - EDTA and complex formation with the Cu2+ ion." Chemical Industry 56, no. 7-8 (2002): 338–45. http://dx.doi.org/10.2298/hemind0208338r.

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Compounds forming very stable complexes - chelates, have a wide field of application in analytical chemistry. The most famous group of these compounds are complexons. Complexons represent organic polyaminocarbonic acids as for example ethylenediaminetetraacetic acid (EDTA) and its salts. The EDTA molecule has six coordinative sites. It is a hexadentate ligands i.e. it has two binding nitrogen atoms and four oxygen atoms from carboxyl groups and it forms complexes with almost all metal ions. EDTA as a tetraprotonic acid, H4Y disociates through four steps, yielding the ions HsY-, H2Y2-, HY3- and

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18

Anderegg, Giorgio. "Polynuclear complexes of the edta analogues." Analytica Chimica Acta 394, no. 2-3 (1999): 345–52. http://dx.doi.org/10.1016/s0003-2670(99)00300-1.

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19

Dexpert-Ghys, J., J. Halwani, and B. Piriou. "Spectroscopic investigation of Eu-EDTA complexes." Inorganica Chimica Acta 139, no. 1-2 (1987): 303–6. http://dx.doi.org/10.1016/s0020-1693(00)84103-1.

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20

Yugeng, Zhang. "Spectroscopy Study on Cobalt EDTA Complexes." Spectroscopy Letters 26, no. 9 (1993): 1673–79. http://dx.doi.org/10.1080/00387019308010766.

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21

Avramenko, V. A., A. V. Voit, E. E. Dmitrieva, et al. "Hydrothermal oxidation of Co-EDTA complexes." Doklady Chemistry 418, no. 1 (2008): 19–21. http://dx.doi.org/10.1134/s0012500808010072.

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22

Dai, Jun-Wei, Jian-Mei Zheng, Hai-Yan Li, Jin-Mei Zhou, Xin Dong, and Zhao-Hui Zhou. "Halide assisted formation of polymeric ethylenediaminetetraacetato lead(ii) complexes." New Journal of Chemistry 41, no. 12 (2017): 5198–204. http://dx.doi.org/10.1039/c7nj00611j.

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Insoluble lead(ii) ethylenediaminetetraacetate isomers [Pb<sub>2</sub>(EDTA)(H<sub>2</sub>O)]<sub>2n</sub> (1) and [Pb<sub>4</sub>(EDTA)<sub>2</sub>]<sub>n</sub>·2nH<sub>2</sub>O (2) and allomers Pb<sub>n</sub>[Pb(EDTA)Pb(H<sub>2</sub>O)X]<sub>2n</sub>·2nH<sub>2</sub>O (X = Cl, 3 and Br, 4) are isolated. 3 and 4 give a new class of lead ethylenediaminetetraacetates. The insoluble products indicate that EDTA is not suitable for solubilizing lead at low pH in the presence of halides.

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23

Beltyukova, Maria, Polina Kuryntseva, Polina Galitskaya, Svetlana Selivanovskaya, Vasiliy Brusko, and Ayrat Dimiev. "Biodegradation Rate of EDTA and IDS and Their Metal Complexes." Horticulturae 9, no. 6 (2023): 623. http://dx.doi.org/10.3390/horticulturae9060623.

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Ethylenediaminetetraacetic acid (EDTA), when used as a main chelator for complex plant microfertilizers, causes many negative environmental effects; therefore, new compounds or new use of the known compounds to replace EDTA have been widely studied. In the present study, biodegradation rate, plant (Raphanus sativus) growth stimulation and ecotoxicity towards Daphnia magna and Chlorella vulgaris of iminodisuccinic acid (IDS), considered as an alternative for EDTA in agriculture, has been investigated. It was demonstrated that IDS’ biodegradation rate over 28 days was 28.1%, which is 4.5 times h

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24

Ramadan, Abd El-Motaleb M., Shaban Y. Shaban, Mohamed M. Ibrahim, et al. "Synthesis and spectroscopic characterization of ternary copper(ii) complexes containing nitrogen and oxygen donors as functional mimics of catechol oxidase and phenoxazinone synthase." New Journal of Chemistry 44, no. 16 (2020): 6331–45. http://dx.doi.org/10.1039/c9nj06131b.

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Two ternary copper(ii) complexes 1 [(Cu<sub>2</sub>Me<sub>4</sub>en)<sub>4</sub>(EDTA)] and 2 [(CuMe<sub>4</sub>en)<sub>2</sub>(MIDA)] containing the mixed ligand system of 1,1′,4,4′-tetramethylethylenediamine (Me<sub>4</sub>en) (L) and N-methyliminodiacetic (MIDAH<sub>2</sub>) (L′) or ethylenediaminetetraacetic acid (EDTAH<sub>4</sub>) (L′) were synthesized.

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25

C., H. RAGHAVANNAMBIAR, NARAYANA B., MURALIDHARA RAO B., and MATHEW BIJU. "Indirect Complexometric Determination of Thallium using Thiourea as Masking Agent." Journal of Indian Chemical Society Vol. 75, Apr 1998 (1998): 265–66. https://doi.org/10.5281/zenodo.5924167.

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Department of Studies in Chemistry, Mangalore University, Mangalagangothri-574 199 <em>Manuscript received 9 April 1996, revised 14 November 1996, accepted 8 August 1997</em> A complexometric method for the determination of Ti<sup>III</sup> in the presence of other metal ions is described based on the selective masking ability of thiourea towards Ti<sup>III</sup> at pH 5.0--6.0 (hexamine). Thallium(m) and diverse metal ions are initially complexed with a known excess of EDTA and the surplus EDTA is titrated with standard zinc sulphate solution using xylenol orange as indicator. An excess of th

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26

S., N. LIMAYE, та C. SAXENA M. "Some Lanthanide-EDTA Ternary Complexes with Protocatechuic and β-Resorcylic Acids". Journal of Indian Chemical Society Vol. 62, Aug 1985 (1985): 572–75. https://doi.org/10.5281/zenodo.6318778.

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Department of Chemistry, Dr. H. B. Gonr Vishwavidyalaya, Sagar-470 003 <em>Manuscript received 10 November 1983, revised 11 April 1985, accepted 31 July 1985</em> The metal ligand stability constants of 1 : 1 binary and 1 : 1 : 1 ternary complexes of some lanthanides have been determined <em>p</em>H-metrically using Irving-Rossotti titration technique. The ternary systems under study are of the type LN-EDTA-L, where LN=La<sup>III</sup>, Ce<sup>III</sup>, Pr<sup>III</sup>, Nd<sup>III</sup> and Sm<sup>III</sup> ; L=protocatechuic (pca), or <em>β</em><em>-</em>resorcylic<em> </em>(<em>β

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27

Durkin, Michelle, Lois Estok, Duane Hospenthal, et al. "Detection of Coccidioides Antigenemia following Dissociation of Immune Complexes." Clinical and Vaccine Immunology 16, no. 10 (2009): 1453–56. http://dx.doi.org/10.1128/cvi.00227-09.

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ABSTRACT Having reported that pretreatment of serum samples with EDTA at 100°C improved the sensitivity for the detection of Histoplasma antigenemia, we have evaluated this method for the detection of Coccidioides antigenemia. Urine and serum samples from patients with coccidioidomycosis were tested using the MVista Coccidioides enzyme immunoassay, and serum samples with and without EDTA-heat treatment were tested. Antigenemia was detected in 28.6% of patients whose samples were not EDTA-heat treated and in 73.1% of those whose samples were treated. Antigenuria was detected in 50% of patients.

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28

Takayama, T., Y. Kani, T. Sekine, H. Kudo та K. Yoshihara. "Formation of nitridotechnetium (VI) μ-oxo dimer complexes with EDTA and EDDA". Journal of Radioanalytical and Nuclear Chemistry Letters 199, № 3 (1995): 217–27. http://dx.doi.org/10.1007/bf02162370.

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29

Thomas, Russell A. P., Kirsten Lawlor, Mark Bailey, and Lynne E. Macaskie. "Biodegradation of Metal-EDTA Complexes by an Enriched Microbial Population." Applied and Environmental Microbiology 64, no. 4 (1998): 1319–22. http://dx.doi.org/10.1128/aem.64.4.1319-1322.1998.

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ABSTRACT A mixed culture utilizing EDTA as the sole carbon source was isolated from a mixed inoculum of water from the River Mersey (United Kingdom) and sludge from an industrial effluent treatment plant. Fourteen component organisms were isolated from the culture, including representatives of the genera Methylobacterium,Variovorax, Enterobacter,Aureobacterium, and Bacillus. The mixed culture biodegraded metal-EDTA complexes slowly; the biodegradability was in the order Fe>Cu>Co>Ni>Cd. By incorporation of inorganic phosphate into the medium as a precipitant ligand, heavy metals wer

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30

Malinen, L. K., R. Koivula, and R. Harjula. "Removal of radiocobalt from EDTA-complexes using oxidation and selective ion exchange." Water Science and Technology 60, no. 4 (2009): 1097–101. http://dx.doi.org/10.2166/wst.2009.458.

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Methods for the removal of radiocobalt from an ethylenediaminetetraacetic acid (EDTA) complex of Co(II) (aqueous solution containing 10 μM Co(II) and 10 μM or 50 μM EDTA traced with 57Co) are presented. The studies examined a combination of different oxidation methods and the sorption of 57Co on a selective inorganic ion exchange material, CoTreat. The oxidation methods used were ultraviolet (UV) irradiation with and without hydrogen peroxide (H2O2), as well as ozonation alone or in combination with UV irradiation. Also, the possible contribution of Degussa P25 TiO2 photocatalyst to degradatio

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31

Shetty, Prakash, and Nityananda Shetty. "Sodium dithionite as a selective demasking agent for the complexometric determination of thallium." Journal of the Serbian Chemical Society 70, no. 11 (2005): 1357–62. http://dx.doi.org/10.2298/jsc0511357s.

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Sodium dithionite is proposed as a new demasking agent for the rapid and selective complexometric determination of thallium(III). In the presence of diverse metal ions, thallium (III) was first complexed with excess EDTA and the surplus EDTA was then titrated with a standard zinc sulphate solution at pH 5-6 (hexamine buffer) using Xylenol Orange as the indicator. The EDTA equivalent to thallium was then released selectively with sodium dithionite and back titrated with a standard zinc sulphate solution as before. Reproducible and accurate results were obtained in the range 4-100 mg of thallium

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32

Neguta, Elena, Aurelian Gulea, Aliona Cotovaia, Ion Bulimestru, Greta Balan, and Sergiu Sova. "Synthesis and study of homo- and heterometallic coordination compounds of Cu(II) and Bi(III) with 4-ethylthiosemicarbazones of 2-formyl and 2-acetylpyridine." Studia Universitatis Moldaviae. Seria Științe ale Naturii, no. 6(166) (April 2024): 118–25. http://dx.doi.org/10.59295/sum6(166)2023_16.

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This paper deals with synthesis and analysis of two series of homo- and heterometallic coordination compounds of Cu(II) and Bi(III) with 4-ethylthiosemicarbazones of 2-formyl and 2-acetylpyridine, with the general formulas: {Cu(HL)}Cu(edta)·nH2O and {Cu(L)}2Cu(edta)·nH2O for Cu(II) homometallic complexes, and {Cu(L)}Bi(edta)·nH2O (n = 1 - 5) for heterometallic compounds. In the synthesized complexes, 4-ethylthiosemicarbazones of 2-formylpyridine (HFoPyTSC-4Et) and 2-acetylpyridine (HAcPyTSC4Et) are in monodeprotonated (L) or nondeprotonated (HL) forms. The antimicrobial and antifungal activiti

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33

Nordberg, Gunnar F., and Monica Nordberg. "UPTAKE AND EXCRETION OF LEAD - EDTA COMPLEXES." Acta Pharmacologica et Toxicologica 59 (March 13, 2009): 494–97. http://dx.doi.org/10.1111/j.1600-0773.1986.tb02811.x.

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34

Madden, Thomas H., Abhaya K. Datye, Melissa Fulton, Michael R. Prairie, Sabir A. Majumdar, and Bertha M. Stange. "Oxidation of Metal−EDTA Complexes by TiO2Photocatalysis." Environmental Science & Technology 31, no. 12 (1997): 3475–81. http://dx.doi.org/10.1021/es970226a.

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35

Kocot, Przemysław, Andrzej Karocki, and Zofia Stasicka. "Photochemistry of the Fe(III)–EDTA complexes." Journal of Photochemistry and Photobiology A: Chemistry 179, no. 1-2 (2006): 176–83. http://dx.doi.org/10.1016/j.jphotochem.2005.08.016.

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36

Dudzinska, Marzenna R., and Dennis A. Clifford. "Anion exchange studies of lead-EDTA complexes." Reactive Polymers 16, no. 1 (1991): 71–80. http://dx.doi.org/10.1016/0923-1137(91)90287-x.

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37

Swartzentruber, S., A. LeMonte, J. Witt, et al. "Improved Detection of Histoplasma Antigenemia following Dissociation of Immune Complexes." Clinical and Vaccine Immunology 16, no. 3 (2009): 320–22. http://dx.doi.org/10.1128/cvi.00409-08.

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ABSTRACT The sensitivity for detection of Histoplasma antigen is lower in serum than in urine. In other antigen assays, treatment of serum at 104°C in the presence of EDTA was required for detection of antigenemia. Sensitivity and specificity for detection of Histoplasma antigenemia were examined with or without EDTA heat treatment of the serum using the MVista Histoplasma antigen enzyme immunoassay. A total of 94.6% of serum specimens from patients with AIDS and histoplasmosis that were negative untreated were positive after EDTA-heat treatment. Two-thirds of the negative serum specimens from

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38

Lin, Qintie, Hanping Pan, Kun Yao, Yonggang Pan, and Wei Long. "Competitive removal of Cu–EDTA and Ni–EDTA via microwave-enhanced Fenton oxidation with hydroxide precipitation." Water Science and Technology 72, no. 7 (2015): 1184–90. http://dx.doi.org/10.2166/wst.2015.329.

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Ethylenediaminetetraacetic acid (EDTA) can form very stable complexes with heavy metal ions, greatly inhibiting conventional metal-removal technologies used in water treatment. Both the oxidation of EDTA and the reduction of metal ions in metal–EDTA systems via the microwave-enhanced Fenton reaction followed by hydroxide precipitation were investigated. The Cu(II)–Ni(II)–EDTA, Cu(II)–EDTA and Ni(II)–EDTA exhibited widely different decomplexation efficiencies under equivalent conditions. When the reaction reached equilibrium, the chemical oxygen demand was reduced by a microwave-enhanced Fenton

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39

Zhang, Kai, Zhan Wang, Shuying Ma, Chen Wu, and Xiaoyang Zhao. "Theoretical Study on the Thermal Decomposition Mechanism of Fe(EDTA)− and Fe(EDTMP)−." Molecules 29, no. 18 (2024): 4362. http://dx.doi.org/10.3390/molecules29184362.

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The decomposition mechanisms of Fe(EDTA)− and Fe(EDTMP)− complexes, widely used in various industrial applications, were investigated through a theoretical approach. Despite their structural similarities, the phosphonic acid and carboxylic acid groups in these complexes lead to vastly different decomposition behaviors. Fe(EDTA)−, stabilized by delocalized π bonds in carboxylic acid groups, exhibited higher stability than that of Fe(EDTMP)−, which has only σ bonds in phosphonic acid groups. Interaction Region Indicator (IRI) analysis revealed that the steric hindrance of Fe(EDTMP)− was stronger

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Gachet, C., D. Hanau, D. Spehner, et al. "Alpha IIb beta 3 integrin dissociation induced by EDTA results in morphological changes of the platelet surface-connected canalicular system with differential location of the two separate subunits." Journal of Cell Biology 120, no. 4 (1993): 1021–30. http://dx.doi.org/10.1083/jcb.120.4.1021.

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Treatment of human platelets by EDTA (5 mM at 37 degrees C and pH 7.4 for 30 min) induces ultrastructural morphological changes of the surface-connected canalicular system (SCCS). The first consists in dilations of some portions of the channels, whereas the second is represented by collapse of parts of the canaliculi. The collapsed elements of the EDTA treated SCCS are made up of two parallel limiting membranes and a central striated zone. Some of the EDTA treated platelets form microaggregates, the cohesion of which is apparently due to the appearance of pentalaminar interplatelet structures.

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Cameselle, Claudio, Susana Gouveia, and Adrian Cabo. "Enhanced Electrokinetic Remediation for the Removal of Heavy Metals from Contaminated Soils." Applied Sciences 11, no. 4 (2021): 1799. http://dx.doi.org/10.3390/app11041799.

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The electrokinetic remediation of an agricultural soil contaminated with heavy metals was studied using organic acids as facilitating agents. The unenhanced electrokinetic treatment using deionized water as processing fluid did not show any significant mobilization and removal of heavy metals due to the low solubilization of metals and precipitation at high pH conditions close to the cathode. EDTA and citric acid 0.1 M were used as facilitating agents to favor the dissolution and transportation of metals. The organic acids were added to the catholyte and penetrated into the soil specimen by el

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Litter, Marta I., and Miguel A. Blesa. "Photodissolution of iron oxides. IV. A comparative study on the photodissolution of hematite, magnetite, and maghemite in EDTA media." Canadian Journal of Chemistry 70, no. 9 (1992): 2502–10. http://dx.doi.org/10.1139/v92-316.

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The thermal and 254-nm photochemical dissolution reactions of magnetite (Fe3O4), maghemite (γ-Fe2O3), and hematite (α-Fe2O3) suspended in EDTA aqueous solutions were compared. γ-Fe2O3 and Fe3O4 are thermally and photochemically more reactive than α-Fe2O3. Both thermal and photochemical dissolution reactions are governed by an initiation step, which involves the production of FeIIaq, and a subsequent thermal reaction of these ions with the solid, to produce FeIIIaq. The initiation step under UV irradiation involves the photoreduction of surface >FeIII – EDTA complexes to yield FeIIaq and the

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Sansonetti, Antonio, Moira Bertasa, Cristina Corti, et al. "Optimization of Copper Stain Removal from Marble through the Formation of Cu(II) Complexes in Agar Gels." Gels 7, no. 3 (2021): 111. http://dx.doi.org/10.3390/gels7030111.

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Copper complexes with different ligands (ethylenediaminetetraacetic acid, EDTA, ammonium citrate tribasic, TAC, and alanine, ALA) were studied in aqueous solutions and hydrogels with the aim of setting the optimal conditions for copper stain removal from marble by agar gels, with damage minimization. The stoichiometry and stability of copper complexes were monitored by ultraviolet-visible (UV-Vis) spectroscopy and the symmetry of Cu(II) centers in the different gel formulations was studied by electron paramagnetic resonance (EPR) spectroscopy. Cleaning effectiveness in optimized conditions was

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Li, Hong-Yi, Dan-Qing Li, Yang Yang, Xie Zhang, Jiang Diao, and Bing Xie. "Re-examination of complexation behaviors of V(v) and V(iv): experimental investigation and theoretical simulation." Journal of Analytical Atomic Spectrometry 35, no. 5 (2020): 878–85. http://dx.doi.org/10.1039/d0ja00018c.

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Pesek, Joseph J., Hassan Abpikar, and Joseph F. Becker. "Fluorescence Lifetime Measurements of Mercury/Protein Complexes." Applied Spectroscopy 42, no. 3 (1988): 473–77. http://dx.doi.org/10.1366/0003702884428059.

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Fluorescence lifetime and steady-state fluorescence measurements are used to characterize various mercury/protein and mercury/protein/EDTA complexes. The proteins studied are ovalbumin, α-chymotrypsinogen, and acid phosphatase. Mercury quenches fluorescence in ovalbumin with a change in lifetime, while in α-chymotrypsinogen quenching occurs without a change in lifetime. No quenching by mercury is observed for acid phosphatase. EDTA causes a further small decrease in fluorescence for both mercury/ovalbumin and mercury/α-chymotrypsinogen, while no change is observed for mercury/acid phosphatase.

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Isa, Kimio, Hideyuki Torii, Toshiaki Kinoshita, Ryuji Nakata, and Keiko Mizuta. "Fast atom bombardment mass spectrometry of EDTA complexes." Journal of the Mass Spectrometry Society of Japan 34, no. 3 (1986): 171–79. http://dx.doi.org/10.5702/massspec.34.171.

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Chatterjee, Debabrata. "Ruthenium(III)-edta type complexes for DNA-metallation." Proceedings / Indian Academy of Sciences 111, no. 3 (1999): 437–42. http://dx.doi.org/10.1007/bf02870840.

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Bukietyńska, K., and A. Mondry. "Spectroscopy and structure of neodymium complexes with EDTA." Inorganica Chimica Acta 110, no. 1 (1985): 1–5. http://dx.doi.org/10.1016/s0020-1693(00)81343-2.

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Caminiti, Ruggero, Carmen Munoz Roca, Daniel Beltran-Porter, and Antonella Rossi. "Amorphous Complexes MM (EDTA) (H2O)4 · 2H2O . LAXS and XPS Investigation of the Local Structure." Zeitschrift für Naturforschung A 43, no. 6 (1988): 591–96. http://dx.doi.org/10.1515/zna-1988-0610.

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Abstract The amorphous MM (EDTA)(H2O)4·2 H2O (M = Ni,Co) substances are made up of infinite chains of alternating "hydrated" and "chelated" octahedra bridged by carboxylate groups: M(H2O)4 - M(EDTA)-M(H2O)4-... . XPS enables to ascertain that the coordination of the EDTA ligand in the amorphous phase is identical to that in the crystalline phase, i.e., hexacoordination toward the M atom and two bridging groups in the Ni -Ni, Co - Co compounds.

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Beuvier, L., C. Bresson, A. Nonell, et al. "Simple separation and characterization of lanthanide–polyaminocarboxylic acid complexes by HILIC ESI-MS." RSC Advances 5, no. 113 (2015): 92858–68. http://dx.doi.org/10.1039/c5ra16078b.

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