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Journal articles on the topic 'Gravimetric determination of Copper(II)'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Acanski, Marijana. "Comparation of fundamental analytical methods for quantitative determination of copper(II)ion." Chemical Industry 62, no. 2 (2008): 85–89. http://dx.doi.org/10.2298/hemind0802085a.

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Copper is a ductile metal with excellent electrical conductivity, and finds extensive use as an electrical conductor, heat conductor, as a building material, and as a component of various alloys. In this work accuracy of methods for quantitative determination (gravimetric and titrimetric methods of analysis) of copper(II) ion was studied. Gravimetric methods do not require a calibration or standardization step (as all other analytical procedures except coulometry do) because the results are calculated directly from the experimental data and molar masses. Thus, when only one or two samples are

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2

V., V. BALAKRISHNA, and APPALA RAJU N. "Gravimetric Determination of Palladium(Il), Copper(II) and Nickel(Il), and Palladium(Il), Copper(Il) and Manganese(II) from Ternary Mixtures, using 2-Hydroxy- I -acetonaphthoneoxime and I-Hydroxy-2-acetonaphthoneoxime." Journal of Indian Chemical Society Vol. 63, May 1986 (1986): 512–14. https://doi.org/10.5281/zenodo.6296740.

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Depaitment of Chemistry, Sri Venkateswara University Post-Graduate Centre, Kurnool-518 001 Department of Chemistry, Sri Venkateswara University, Tirupati-517 502 <em>Manuscript received 30 July 1985, revised 24 February 1986, accepted 23 April 1986</em> 2-Hydroxy-1-acetonaphthoneoxime and its isomer 1-hydroxy-2-acetonaphthoneoxime have been used as reagents for the gravimetric determination of palladium(II), copper(II) and nickel(II) as well as palladium(II), copper(II) and manganese(II) from ternary mixtures. The results obtained are fairly accurate.

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3

HAYASHI, Kenjiro, Yoshiaki SASAKI, Shoji TAGASHIRA, Yoshiko MURAKAMI, Koukichi KUSUMORI, and Yoshiko MORINAGA. "Gravimetric determination of copper(II) with ammonium 1-pyrrolidine dithiocarbamate." Bunseki kagaku 36, no. 7 (1987): 450–52. http://dx.doi.org/10.2116/bunsekikagaku.36.7_450.

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4

Tubino, Matthieu, and Rafael L. de Souza. "Gravimetric Method for the Determination of Diclofenac in Pharmaceutical Preparations." Journal of AOAC INTERNATIONAL 88, no. 6 (2005): 1684–87. http://dx.doi.org/10.1093/jaoac/88.6.1684.

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Abstract A gravimetric method for the determination of diclofenac in pharmaceutical preparations was developed. Diclofenac is precipitated from aqueous solution with copper(II) acetate in pH 5.3 (acetic acid/acetate buffer). Sample aliquots had approximately the same quantity of the drug content in tablets (50 mg) or in ampules (75 mg). The observed standard deviation was about ± 2 mg; therefore, the relative standard deviation (RSD) was approximately 4% for tablet and 3% for ampule preparations. The results were compared with those obtained with the liquid chromatography method recommended in

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5

Krishna Purohit, Miss, and K. K. Desai. "2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)." E-Journal of Chemistry 2, no. 2 (2005): 161–64. http://dx.doi.org/10.1155/2005/825847.

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2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×102L mol-1cm-1and 0.090 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×109. Gibb’s free energy change for complex formation reaction was

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6

Shingadia, S. K., and K. K. Desai. "2-Hydroxy-5-methylbenzophenone oxime(HMBO) as an Analytical Reagent for Gravimetric Determination of Cu(II)." E-Journal of Chemistry 4, no. 1 (2007): 97–102. http://dx.doi.org/10.1155/2007/459181.

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2-Hydroxy-5-methylbenzophenone oxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of divalent copper ion. In pH rang of 3.0 to 6.0, the reagent gives a buff colored precipitate with Cu(II). Job’s method and mole ratio method revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer’s law is obeyed up to 61.25 ppm of Cu(II). Molar absorptivity and Sandell’s sensitivity at 400 nm were found to be 6.32 × 102L mol-1cm-1and 0.359 μg/cm2respectively. The stability constant of Cu(II)-HMBO complex is found to be 2.43 × 109. Gibb’s free energy cha

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7

Mohabey, Hemlata. "IR Spectra, Magnetic and Thermal Studies of Copper (II) Complex of N-Hydroxy-N-(4-Chloro) Phenyl N’(4-Fluoro) Phenyl Benzamidine Hydrochloride." Material Science Research India 11, no. 1 (2014): 63–65. http://dx.doi.org/10.13005/msri/110108.

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Copper (II) reacts with HCPFPBH and forms buff coloured precipitate insoluble in many organic solvents like absolute alcohol, ether, benzene, chloroform etc. The Solid complex has molecular formula (C19H13N2OFCl)2Cu which melts at 2020C with decomposition. The infrared spectra of the complex was recorded in the range 4000-450cm-1. The ligand molecule consists of a weak band at 2550 cm-1. This confirms the presence of azomethine nitrogen in the ligand. This band is absent in the IR Spectrum of the complex confirming the involvement of this group in complexation . The strong band of the ligand a

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8

Uesugi, Katsuya, Tetsu Kumagai, and Soichiro Wada. "Gravimetric determination of copper with 2-hydroxy-1-naphthaldoxime." Microchemical Journal 33, no. 2 (1986): 204–8. http://dx.doi.org/10.1016/0026-265x(86)90056-1.

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9

Meena, Asha. "THERMAL DEGRADATION OF COPPER (II) GROUNDNUT SOAP COMPLEXES." International Journal of Global Research Innovations & Technology 03, no. 01 (2025): 43–46. https://doi.org/10.62823/ijgrit/03.01.7197.

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Oil occurred natural sources are considered to be the essential category of renewable sources and can be produced as of natural plants such as groundnut, they comprise generally of triglycerides. The main object of this work gives an outline of innovative result in the area of thermo gravimetric analysis for Copper (II) groundnut soap complexes. Solid state kinetics has fascinated the awareness of precise society not only due to its abundant applications in environment, energy, waste water treatment, pollution control and green chemistry but also due to their extensive variety of biological ac

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10

Yu, Yuan Yan. "Interaction of Human-Like Collagen with Copper (II): Effect on Thermal Characteristics." Advanced Materials Research 721 (July 2013): 625–28. http://dx.doi.org/10.4028/www.scientific.net/amr.721.625.

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This work describes the aqueous-solution technique preparation and characterization of the complex between human-like collagen and copper (II). Pure human-like collagen and the copper complex were characterized by thermo gravimetric (TG) and differential scanning calorimetry (DSC) analysis. The TG curves and DSC data reveal the significant thermal differences between pure protein and the copper complex, demonstrating the formation of a new chemical compound, which is different from the free HLC and with more stable thermodynamic properties.

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11

SHREESH, BHARDWAJ, N. ANSARI MOHD., and C. JAIN MAHESH. "Bis-4-phthalianilic Acid Sulphone : A New Specific Gravimetric Reagent for Copper(II)." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 441–42. https://doi.org/10.5281/zenodo.6298967.

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Department of Chemistry, S. D. (P. G.) College, Muzaffarnagar-251 001 <em>Manuscript received 7 February 1989, revised 11 December 1989, accepted 21 December 1989</em> Bis-4-phthalianilic Acid Sulphone : A New Specific Gravimetric Reagent for Copper(II) 

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12

J, D. TALAT, S. PARIKH K, and K. PATEL P. "2-Hydroxy-4-n-butoxyacetophenone Oxime as an Extraction Photometric and Gravimetric Reagent for Simultaneous Determination of Nickel and Copper." Journal of Indian Chemical Society Vol. 72, Oct 1995 (1995): 749–51. https://doi.org/10.5281/zenodo.5909397.

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Chemtstry Department, Shn U P Arts. Smt M G Panchal Science and Shri V L Shah Commerce College, Pilvai-382 850 <em>Manuscript received 27 July 1993, rev1sed 7 February 1994, accepted 23 May 1994</em> 2-Hydroxy-4-n-butoxyacetophenone Oxime as an Extraction Photometric and Gravimetric Reagent for Simultaneous Determination of Nickel and Copper

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13

Kavitha, Ch, M. Sarath Babu, and K. Saraswathi. "Spectrophotometric Determination of Copper as Copper Piperazine." International Letters of Chemistry, Physics and Astronomy 13 (September 2013): 205–9. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.13.205.

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Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes

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14

Kavitha, Ch, M. Sarath Babu, and K. Saraswathi. "Spectrophotometric Determination of Copper as Copper Piperazine." International Letters of Chemistry, Physics and Astronomy 13 (May 3, 2013): 205–9. http://dx.doi.org/10.56431/p-584j8g.

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Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes

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15

Rajkovic, Milos. "Complexometric determination, Part II: Complexometric determination of Cu2+-ions." Chemical Industry 56, no. 10 (2002): 429–35. http://dx.doi.org/10.2298/hemind0210429r.

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A copper-selective electrode of the coated wire type based on sulphidized copper wire was applied successfully for determining Cu(II) ions by complexometric titration with the disodium salt of EDTA (complexon III). By the formation of internal complex compounds with the Cu(II) ion, the copper concentration in the solution decreases, and all this is followed by a change of potential of the indicator system Cu-DWISE (or Cu-EDWISE)/SCE. At the terminal point of titration, when all the Cu(II) ions are already utilized for the formation of the complex with EDTA, there occurs a steep rise of potenti

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16

Shlyamina, O. V., N. A. Morozova, L. A. Anisimova, and G. K. Budnikov. "Extraction-Coulometric Determination of Copper as Copper(II) 8-Hydroxyquinolinate." Journal of Analytical Chemistry 60, no. 5 (2005): 444–46. http://dx.doi.org/10.1007/s10809-005-0117-7.

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17

Safavi, A., and M. R. Baezzat. "Chemiluminescence Flow Injection Determination of Copper (II)." Analytical Letters 33, no. 4 (2000): 667–75. http://dx.doi.org/10.1080/00032710008543082.

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18

Ren, Shouxin, and Ling Gao. "Simultaneous spectrophotometric determination of copper(II), lead(II) and cadrnium(II)." Journal of Automatic Chemistry 17, no. 3 (1995): 115–18. http://dx.doi.org/10.1155/s1463924695000204.

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The full spectrum technique in the fourier domain was studied for simultaneous determination of Cu(II), Pb(II) and Cd(II) with 4-(2-pyridylazo) resorcinol (PAR). A program called SPGRFSQ. was designed to perform the calculations. Seven error functions were calculated for deducing the number of factors. Data reduction was performed using principal component analysis (PCA) algorithm. Experimental results showed the method to be successful even where there was severe overlap of spectra.

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19

Graham, Bim, Milton T. W. Hearn, Leone Spiccia, Brian W. Skelton, and Allan H. White. "Amino Acid Binding to Copper(II) in (1,4,7-Triazacyclononane) (L-histidine)copper(II) Hexafluorophosphate Monohydrate." Australian Journal of Chemistry 56, no. 12 (2003): 1259. http://dx.doi.org/10.1071/ch03149.

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The synthesis, characterization, and single-crystal X-ray structure determination of [Cu(tacn)(L-His)](PF6)2 . H2O (tacn = 1,4,7-triazacyclononane, L-His = L-histidine) are reported. Spectroscopic studies indicated the formation of the square pyramidal copper(II) complex [Cu(tacn)(L-His)]2+. This was confirmed through structure determination, which also revealed that the distorted square-pyramidal copper(II) coordination sphere is comprised of three nitrogen donors from the tacn macrocycle plus one carboxylate oxygen atom and the primary nitrogen atom from L-histidine. The L-histidine ligand i

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20

Anil, Kr. Bansal, and Nagar Meena. "Spectrophotometric determination of copper(II) and nickel(II) using thiosemicarbazone of citral." Journal of Indian Chemical Society Vol. 83, Jul 2006 (2006): 731–32. https://doi.org/10.5281/zenodo.5825310.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India E-mail: anil_mandrail@yahoo.com <em>Manuscript received 17 March 2006, revised 6 April 2006, accepted 10 April 2006</em> Thiosemicarbazone of citral, a condensation product of industrially and ecofriendly terpenoid serve as very good analytical reasent for hiologicully important metal copper and nickel. The analytical properties of thiosemicarbazone of citral(CDOTSC) are described for the first time. The reagent gives brown colour complex with copper and grey colour complex with nickel in sodiumucetate&nbsp

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21

PARTHA, CHATTOPADHYAY, and K. MAJUMDAR SANTOSH. "Solvent Extraction and Determination of Nickel(II) and Palladium(II) with Pyridines in Thiocyanate System." Journal of Indian Chemical Society Vol. 62, Feb 1985 (1985): 150–51. https://doi.org/10.5281/zenodo.6319662.

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Department of Chemistry, North Bengal University, Darjeeling-734 430 <em>Manuscript received 6 October 1980, revised 22 August 1983, accepted 8 November 1984</em> Solvent-extraction and spectrophotometric determination of Pd<sup>II</sup> as pyridine/<em>α</em>-pic/ <em>β</em> pic/ \(\gamma \)-pic/ 2 : 4 : 6-collidine thiocyanates, and extractive-gravimetric determination of Ni<sup>II</sup> as pyridine/<em>β</em>-pic/\(\gamma\)-pic thiocyanate have been described. Ni<sup>II</sup> does not form complexes in presence of thiocyanate when the methyl group is

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22

Kumar, Bijay, Santosh Kumar Sethi, and Ashok Kumar Yadav. "Bis-(3,5-dimethyl salicylidine)-ethylenediamine as a Gravimetric Reagent for Cu(II)." Oriental Journal Of Chemistry 36, no. 05 (2020): 980–84. http://dx.doi.org/10.13005/ojc/360528.

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Complex of Cu(II) with bis-(3,5-dimethyl salicylidine)-ethylenediamine was synthesized and characterized by elemental analysis, melting point determination, conductivity measurement, magnetic and spectroscopic studies. Molecular formula of the newly prepared complex was determined as C20H22N2O2Cu and the probable geometry has been suggested as square planar. Gravimetric estimation of Cu(II) was made with bis-(3,5-dimethyl salicylidine)-ethylenediamine and the result was compared with the known method of estimation of Cu(II) iodometrically. It was found that the result of estimation with newly

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23

S., Vidyasagar Babu, and Hussain Reddy K. "Spectrophotometric determination of copper(II) and palladium(II) using 3-hydroxybenzaldehyde thiosemicarbazone." Journal of Indian Chemical Society Vol. 83, Jan 2006 (2006): 20–22. https://doi.org/10.5281/zenodo.5815117.

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Department of Chemistry, Sri Krishnadevaraya University, Anantapur-515 003, Andhra Pradesh, India <em>Manuscript received 23 June 2004, revised 22 August 2005, accepted 29 August 2005</em> The analytical properties of 3-hydroxybenzaldehyde thiosemicarbazones (HBT) are described for the first time. The reagent gives yellowish green coloured complexes with copper(II), palladium(ll) in sodium acetate-acetic acid buffer medium of pH 5.5 and 2.5 respectively. The molar absorptivities or copper and palladium complexes respectively are 8.75 x 10<sup>3</sup>, and 1.25 x 10<sup>4 </sup>L mol<sup>-1</su

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24

K., B. SARAN, C. ROY B., and LAHIRI S. "3-(p-Acetophenyl)-1-phenyltriazene-N-oxide. A New Reagent for Gravimetric Determination of Nickei(II) and Palladium(ll) and their Separation from Binary Mixture." Journal of Indian Chemical Society Vol. 63, May 1996 (1986): 532–33. https://doi.org/10.5281/zenodo.6276034.

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Department of Chemistry, Jadavpur University, Calcutta-700 032 <em>Manuscript received 11 May 1982, revised 25 February 1986, accepted 31 March 1986</em> 3-(<em>p</em>-Acetophenyl)-1-phenyltriazene-<em>N</em>-oxide. A New Reagent for Gravimetric Determination of Nickei(II) and Palladium(ll) and their Separation from Binary Mixture.

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25

Khojasteh, Roya Ranjineh, and Mitra Maleki. "Recyclable Cu(II)-(MAA-EGDMA) catalyst for selective oxidation of alcohols to aldehydes using sodium hypochlorite." European Journal of Chemistry 11, no. 2 (2020): 105–12. http://dx.doi.org/10.5155/eurjchem.11.2.105-112.1964.

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Copper(II) α-benzoin oxime complex was synthesized by the reaction between copper(II) benzoate and α-benzoin oxime. The poly methacrylic acid-ethylene glycol dimethacrylate (MAA-EGDMA) was applied as support of copper complex catalyst for oxidation of alcohols to aldehydes using NaClO. The structure and morphology of immobilized Cu(II)-benzoin oxime have been studied by using different analysis including Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) and Thermal Gravimetric Analysis (TGA). The yield of aldehydes was determined by Gas Chromatography (GC) ana

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26

YAMAGUCHI, Takako, Megumi SAMMA, Shinichiro KAMINO, Momoka MATSUSHITA, Tomoyuki HASHIMOTO, and Yoshikazu FUJITA. "Spectrophotometric Determination of Copper(II) with o-Bromophenylfluorone." Analytical Sciences 25, no. 12 (2009): 1457–60. http://dx.doi.org/10.2116/analsci.25.1457.

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27

Mautner, Franz A., and Salah S. Massoud. "Structure determination of picolinato–copper(II)-amine complexes." Journal of Molecular Structure 871, no. 1-3 (2007): 108–13. http://dx.doi.org/10.1016/j.molstruc.2007.02.001.

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28

Aliyeva, F. S., F. O. Mamedova, F. N. Bahmanova, Yu A. Yusibov, and F. M. Chyragov. "Photometric determination of copper (II) microquantities in pyrite." Industrial laboratory. Diagnostics of materials 85, no. 10 (2019): 23–28. http://dx.doi.org/10.26896/1028-6861-2019-85-10-23-28.

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29

Hashem, E. Y., M. M. Seleim, and Ahmed M. El-Zohry. "Environmental method for spectrophotometric determination of copper(II)." Green Chemistry Letters and Reviews 4, no. 3 (2011): 241–48. http://dx.doi.org/10.1080/17518253.2010.546370.

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30

Preininger, Claudia, and Bengt Danielsson. "Thermometric determination of copper(II) using acid urease." Analyst 121, no. 11 (1996): 1717. http://dx.doi.org/10.1039/an9962101717.

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31

Alaa, E. Ali, S. Elasalaa Gehan, Mostafa Kamel Hesham, Elkholany A.S., and S. Mohamed Asmaa. "Spectrophotometric Determination Studies of Copper (II)roxithromycin Complex." Chemistry Research Journal 6, no. 5 (2024): 24–30. https://doi.org/10.5281/zenodo.11760903.

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<strong>Abstract </strong>In this work roxithromycin and its Cu (II) metal complex determination were carried out by spectrophotometric method. The following experimental procedures like effect of pH, effect of metal ion concentration, effect of drug concentration, effect of time and the composition of the complex by mole ratio .In this research work, it is clear that Cu forms a stable 1:1 colored complex with roxithromycinin acidic medium it is noticed from that at pH 3.2 and roxithromycin colored complex was formed.

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32

Matusiak, Jolanta, and Andrzej Wyciślik. "Determination of Nickel in Welding Fume by Gravimetric Method Using Dimethylglyoxime." Solid State Phenomena 226 (January 2015): 7–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.226.7.

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Welding fume emitted while welding stainless chromium-nickel steels contains mainly nickel oxides (NiO, NiO2 and Ni2O3). Welding in the inert gas shielding as well as plasma and laser cutting of parent materials of a high content of nickel ranks among the welding processes characterised by the highest concentrations of nickel oxides in welding fume. The predicted content of this element in the mass % range of 0.7 to 6% has been adopted as a criterion for the selection of the analytical method of the determining nickel content in the welding fume. Determination of nickel is based on dissolution

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33

Vučurović, Borislava D., and Miloš B. Rajković. "Copper-deposited wire ion-selective electrode for the determination of copper(II)." Analyst 112, no. 4 (1987): 539–42. http://dx.doi.org/10.1039/an9871200539.

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34

Norkus, E., P. Norkus, J. Vaičiūniené, and J. Jačiauskiené. "Determination of Copper(II) in Electroless Copper Plating Solutions Containing Cobalt(II) Complexes as Reducing Agent." Transactions of the IMF 79, no. 2 (2001): 77–78. http://dx.doi.org/10.1080/00202967.2001.11871367.

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35

Kuzmin, I. I., T. Kh Chyong, Ya I. Simakina, A. V. Mikhailova, and Yu I. Fabelinsky. "Determination of Copper(II) Ions by Diffuse Reflectance Spectroscopy Method." Fine Chemical Technologies 14, no. 2 (2019): 78–86. http://dx.doi.org/10.32362/2410-6593-2018-14-2-78-86.

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A method for copper(II) determination based on copper(II) ions interaction with the organic reagent picramine-ε, concentrating the formed complex on a solid-phase matrix and recording diffuse reflectance spectroscopy spectra by a portable combined LED miniphotometer was developed. Poly-ε-caproamide membranes were investigated as solid-phase matrixes. It was found that the diffuse reflectance coefficient of the studied membranes in the visible spectrum region does not depend on wavelength. So, the signal from membranes does not distort the results of the analysis. Factors controlling the proces

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36

Tadhamun Sabah Younus and Tariq Ali Fahd. "Synthesis and Thermal Studies of Some Metal azo Complexes Derived from Hydroxy coumarin." Journal of Kufa for Chemical Sciences 2, no. 9 (2023): 163–77. http://dx.doi.org/10.36329/jkcm/2022/v2.i9.11156.

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In the current study, of two azo dyes made from coumarin and procaine (T1) and coumarin and Sulfa guanidine (T2)were synthesized. The dyes were characterized by IR, CHN, 1H-NMR, 13C-NMR and MS spectroscopic techniques. . To make azo metal(II) complexes, these novel legands were combined with acetate salts of copper(II) and nickel(II) in a 1:2 molar ratio.The metal to ligand ratio [M:L] in all complexes, according to analytical data, is (1:2).This ligand behaves as a bidentate chelating, according to spectral and analytical data.Thermo gravimetric (TGA) analysis was used to study the thermal be

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37

Tobin, Sean, John Cassidy, Kevin Kurian, and Anthony Betts. "Analysis of copper(." Australian Journal of Chemistry 75, no. 10 (2022): 835–38. http://dx.doi.org/10.1071/ch22164.

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In deionised water, ascorbic acid (AH−), through oxidation by oxygen in the presence of copper(ii), was found to degrade with zero-order kinetics. The magnitude of the reaction rate varied directly with the copper(ii) concentration. At a higher pH (7.4), the same reaction was found to be pseudo-first order. Once again, the magnitude of the rate increased linearly with copper(ii) concentration at a micromolar level. Dissolved oxygen levels, in excess AH− and trace copper(ii), displayed similar kinetics under both conditions. Monitoring of either AH− levels or dissolved oxygen concentration was

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38

Skorodumova, Ekaterina A., Evgeniya D. Karateeva, and Irina V. Kosyreva. "Express determination of ceftriaxone using immobilized copper sulfate (II)." Izvestiya of Saratov University. Chemistry. Biology. Ecology 25, no. 2 (2025): 143–50. https://doi.org/10.18500/1816-9775-2025-25-2-143-150.

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Indicator papers based on immobilized copper (II) sulfate have been obtained for the determination of theβ-lactam antibiotic ceftriaxone. The interaction of immobilized copper (II) sulfate with ceftriaxone has been assessed using diffuse reflectance spectroscopy. Methods have been developed for visual colorimetric and colorimetric determination of the antibiotic using a smartphone camera, Adobe Photoshop CS5® software, and a regression model built using the Python programming language. Color test scales for rapid assessment of ceftriaxone content have been obtained. Metrological characteristic

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39

Ali, Abd-Elhafeez E. "Ternary complexes of copper(II) and their use in the spectrophotometric determination of copper in alloys and rocks." Canadian Journal of Chemistry 71, no. 7 (1993): 1002–5. http://dx.doi.org/10.1139/v93-133.

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Some intensely coloured Cu(II)–L1–2′,7′-dichlorofluorescein ternary complexes were studied. The absorbance characteristics for these ternary complexes were determined. The molar ratio for these complexes is Cu:L1:L2 = 1:2:1 and the formula [Cu(L1)2]2+•[Cl2FlCOO−]− is proposed. The effect of substituent groups of the L1 and L2 ligands on the complexing activity with copper(II) was studied. The interference of some cations and anions in the determination of the Cu(II) by the developed methods was examined. Highly sensitive and selective methods are proposed for the spectrophotometric determinati

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40

Echavarría, Alejandro, Rodolfo Ruiz, Félix Echeverría, Carlos Arroyave, and Emilio Cano. "Coulometric determinations on copper samples exposed to low content propionic acid vapor environments." Revista Facultad de Ingeniería Universidad de Antioquia, no. 32 (November 5, 2004): 62–71. http://dx.doi.org/10.17533/udea.redin.344367.

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In the present study the effect of three propionic acid vapor concentrations (260, 380 and 680 parts by billion in volume, ppbv) on the deterioration of copper was evaluated in an air stream at 30 °C and 90% of relative humidity, using the coulometric reduction technique for the determination of the total charge required to reduce the formed copper compounds, according to ASTM B-825-97. The electrochemical tests were performed on samples exposed during 7, 14 and 21 days. In addition, gravimetric determinations for the samples with 21 days of exposure were made, according to ASTM G1-90, in orde

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Ragehy, N. A. El, M. Abdelkawy, and A. El Bayoumy. "Spectrophotometric Determination of Ibuprofen via its Copper (II) Complex." Analytical Letters 27, no. 11 (1994): 2127–39. http://dx.doi.org/10.1080/00032719408007240.

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Haapakka, K., J. Kankare, and S. Kulmala. "Specific determination of trace copper(II) by cathodic electroluminescence." Analytica Chimica Acta 211 (1988): 105–18. http://dx.doi.org/10.1016/s0003-2670(00)83673-9.

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Thomsen, Marcus W. "Determination of the solubility product of copper(II) tartrate." Journal of Chemical Education 69, no. 4 (1992): 328. http://dx.doi.org/10.1021/ed069p328.

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Bernhardt, Paul V., Peter Comba, Trevor W. Hambley, Salah S. Massoud, and Sandra Stebler. "Determination of solution structures of binuclear copper(II) complexes." Inorganic Chemistry 31, no. 12 (1992): 2644–51. http://dx.doi.org/10.1021/ic00038a061.

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Linnik, R. P., and O. A. Zaporozhets. "Chemiluminescence determination of dissolved copper(II) in natural waters." Journal of Analytical Chemistry 69, no. 6 (2014): 519–24. http://dx.doi.org/10.1134/s1061934814040054.

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Kamidate, Tamio, Atsushi Ishikawa, and Hiroto Watanabe. "Luminol Chemiluminescence-Delay Method for Determination of Copper(II)." Bulletin of the Chemical Society of Japan 65, no. 6 (1992): 1591–94. http://dx.doi.org/10.1246/bcsj.65.1591.

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Bag, M., P. Chattopadhyay, and S. Basu. "Determination of copper(II) by displacement substoichiometric extraction with radiolabeled cobalt(II)." Radiochemistry 55, no. 2 (2013): 220–23. http://dx.doi.org/10.1134/s1066362213020136.

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SHASHI, K. BANSAL, TIKKU SHIELLA, SHREY SUMAN, and S. SINDHU R. "Spectrophotometric Determination of lron(II) and Copper(II) with 2.,6-Pyridinediol." Journal Of Indian Chemical Society Vol. 66, Dec 1989 (1989): 917–18. https://doi.org/10.5281/zenodo.6201002.

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Chemistry Department, Regional College of Education, Ajmer-305 004 <em>Manuscript received </em> 29 August 1988, revised 17 April 1989, accepted 20 July 1989 Spectrophotometric Determination of lron(II) and Copper(II) with 2.,6-Pyridinediol  

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G., V. S. R. Pavan Kumar, Chandra Sekhar T., Luke Paul V., and Sreerama Murty B. "N,N-Dimethyl-4-amino pyridine (DMAP) as a novel and sensitive reagent for the spectrophotometric determination of copper(II)." Journal of Indian Chemical Society Vol. 91, Nov 2014 (2014): 2047–50. https://doi.org/10.5281/zenodo.5735152.

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Department of Chemistry, M. V. G. R. College of Engineering, Chintalavalasa, Vizianagaram-535 003, Andhra Pradesh, India <em>E-mail </em>: prs_ganti@yahoo.co.in, sreeram6000@gmail.com Department of Chemistry, Govt. Degree College, Tekkali-530 046, Andhra Pradesh, India <em>Manuscript received online 21 May 2014, revised 17 June 2014, accepted 17 June 2014</em> The present work deals with the spectrophotometric determination of copper(II) with <em>N,N</em>-dimethyl-4-amino pyridine (DMAP) as a chromogen. This method developed by the authors is found to be simple, accurate and precise for the de

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Antighin, Simona, and Laura Chirilă. "Synthesis and Characterization of a New Coordinative Compound of Cu(II) with 1-(3 Bromo, 2 Hydroxy, 4 Methylphenyl)- 2-(4 Bromo-Phenyl-Sulphanyl)- Etanone." Acta Chemica Iasi 23, no. 1 (2015): 1–12. http://dx.doi.org/10.1515/achi-2015-0001.

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Abstract Continuing the research in the field of complex compounds, the authors present in this paper the synthesis and characterization of a new compound of Cu(II) with the ligand 1-(3 bromo, 2 hydroxy, 4 methyl-phenyl)-2-(4 bromophenyl- sulphanyl)-etanone. Different methods were used, such as chemical elemental analysis, thermal-gravimetry, infrared absorption spectroscopy and electronic spin resonance (ESR). From chemical analysis resulted that the combination ratio ligand-central atom is 2:1. The new compound can also be used for gravimetric determination of Cu(II).

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