Log in

Relevant bibliographies by topics / COMPLEXOMETRY / Journal articles

To see the other types of publications on this topic, follow the link: COMPLEXOMETRY.

Journal articles on the topic 'COMPLEXOMETRY'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'COMPLEXOMETRY.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Risani Rusnel, Azizah, Dinda Putri Karim, Rahmida Marlini, and Siska Maharani. "Determination of CaCO3 Content in Egg Shell." Journal of Global Research Education 2, no. 2 (2025): 63–69. https://doi.org/10.62194/4y5hr711.

Full text

Abstract:

The complexometry titration investigation has been conducting to ascertain the CaCO3 concentration of Egg. The complex substance EDTA will hold the calcium, and the point will be signaled by a change in the metallochromic indicator's color. Standardization EDTA : Pipette 25 mL of MgSO4.7H2O solution, 10 mL of buffer solution pH 10, a little amount of EBT indicator, and aqua DM into the titration flask. When you titrate with EDTA solution, the solution turns blue. Data processing has revealed that eggshell contains 0,025 grams of calcium and that the calcium content is 14,1%. Theoretically, egg

APA, Harvard, Vancouver, ISO, and other styles

2

O., P. RATHORE, and LAVALE S.C. "Spectrophotometric and Amperometric Studies of Complexes of Dysprosium(III) with Rhodamine B : Analytical Complexometry." Journal of Indian Chemical Society Vol. 74, Jul 1997 (1997): 584. https://doi.org/10.5281/zenodo.5908839.

Full text

Abstract:

Chemical Research Laboratory, Government P. G. College, Betul-460 001 <em>Manuscript received 2 February /995, revised 28 May 1996, accepted 7 June 1996</em> Spectrophotometric and Amperometric Studies of Complexes of Dysprosium(III) with Rhodamine B : Analytical Complexometry.

APA, Harvard, Vancouver, ISO, and other styles

3

CARVALHO FILHO, Marco Aurélio da Silva, and Massao IONASHIRO. "Thermal behaviour study of solid state compounds of manganese (II), zinc (II) and lead (II) with cinnamic acid." Eclética Química 23 (1998): 09–16. http://dx.doi.org/10.1590/s0100-46701998000100001.

Full text

Abstract:

Compounds of cinnamic acid with manganese, zinc and lead have been prepared in aqueous solution. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction and complexometry have been used in the characterization as well as in the study of the thermal stability and interpretation concerning the thermal decomposition.

APA, Harvard, Vancouver, ISO, and other styles

4

Carvalho Filho, Marco Aurélio da Silva, and Massao Ionashiro. "Thermal behaviour study of solid state compounds of manganese (II), zinc (II) and lead (II) with cinnamic acid." Ecletica Quimica 23, no. 1 (1998): 9–16. http://dx.doi.org/10.26850/1678-4618eqj.v23.1.1998.p09-16.

Full text

Abstract:

ompounds of cinnamic acid with manganese, zinc and lead have been prepared in aqueous solution. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction and complexometry have been used in the characterization as well as in the study of the thermal stability and interpretation concerning the thermal decomposition.

APA, Harvard, Vancouver, ISO, and other styles

5

Zheng, Xiao-Min, and Xue-Mei Wang. "Determination of Oxalate in Vanadyl Oxalate by Complexometry." CHINESE JOURNAL OF ANALYTICAL CHEMISTRY (CHINESE VERSION) 41, no. 12 (2013): 1947. http://dx.doi.org/10.3724/sp.j.1096.2013.30369.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

SCHNITZLER, Egon, Wilson COSTA, Cristo Bladimiros MELIOS, Maria Ines Gonçalves LELES, and Massao IONASHIRO. "Thermal behavior studies of solid state compounds of 4-dimethylaminocinnamylidenepyruvate with alkali earth metals, except beryllium and radium." Eclética Química 25 (2000): 31–39. http://dx.doi.org/10.1590/s0100-46702000000100003.

Full text

Abstract:

Solid state compounds of general formula M(DMCP)2.nH2O, where M represents Mg, Ca, Sr, Ba, and DMCP is 4-dimethylaminocinnamylidenepyruvate, and n = 1, except for Ca, where n = 2.5, have been prepared. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometry were used to characterize and to study the thermal decomposition of these compounds.

APA, Harvard, Vancouver, ISO, and other styles

7

Schnitzler, Egon, Cristo Bladimiros Melios, Maria Inês Gonçalves Leles, and Massao Ionashiro. "Thermal behavior studies of solid state compounds of 4-dimethylaminocinnamylidenepyruvate with alkali earth metals, except beryllium and radium." Ecletica Quimica 25, no. 1 (2000): 31–39. http://dx.doi.org/10.26850/1678-4618eqj.v25.1.2000.p31-39.

Full text

Abstract:

Solid state compounds of general formula M(DMCP)2.nH2O, where M represents Mg, Ca, Sr, Ba, and DMCP is 4-dimethylaminocinnamylidenepyruvate, and n = 1, except for Ca, where n = 2.5, have been prepared. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometry were used to characterize and to study the thermal decomposition of these compounds.

APA, Harvard, Vancouver, ISO, and other styles

8

Mendes, Roni Antônio, Gilbert Bannach, Elias Yuki Ionashiro, and Massao Ionashiro. "Synthesis, characterization and thermal studies of solid state 4-methylbenzylidenepyruvate of some trivalent metal ions." Ecletica Quimica 30, no. 2 (2005): 25–30. http://dx.doi.org/10.26850/1678-4618eqj.v30.2.2005.p25-30.

Full text

Abstract:

Solid state compounds of 4-methylbenzylidenepyruvate with Al(III), Ga(III), In(III) and Sc(III)have been synthesized. Complexometry, X-ray powder diffractometry, infrared spectroscopy andsimultaneous thermogravimetry-differential thermal analysis (TG-DTA) have been used to characterizeand to study the thermal behavior of these compounds. The results provided information concerning thestoichiometry, crystallinity, thermal stability and thermal decomposition of these compounds.

APA, Harvard, Vancouver, ISO, and other styles

9

Mendes, R. A., G. Bannach, E. Y. Ionashiro, and M. Ionashiro. "Synthesis, characterization and thermal studies of solid state 4-methylbenzylidenepyruvate of some trivalent metal ions." Eclética Química 30, no. 2 (2005): 25–30. http://dx.doi.org/10.1590/s0100-46702005000200003.

Full text

Abstract:

Solid state compounds of 4-methylbenzylidenepyruvate with Al(III), Ga(III), In(III) and Sc(III) have been synthesized. Complexometry, X-ray powder diffractometry, infrared spectroscopy and simultaneous thermogravimetry-differential thermal analysis (TG-DTA) have been used to characterize and to study the thermal behavior of these compounds. The results provided information concerning the stoichiometry, crystallinity, thermal stability and thermal decomposition of these compounds.

APA, Harvard, Vancouver, ISO, and other styles

10

Rodrigues, Emanuel Carlos, Adriana Cossu Vallejo, Elias Yuki Ionashiro, Girbert Bannach, and Massao Ionashiro. "Synthesis, characterization and thermal behaviour of solid state compounds of 4-methoxybenzoate with Manganese, Nickel and Copper." Ecletica Quimica 30, no. 1 (2005): 15–20. http://dx.doi.org/10.26850/1678-4618eqj.v30.1.2005.p15-20.

Full text

Abstract:

Solid state M-L compounds, where M stands for bivalent Mn, Ni, Cu and L is 4-methoxybenzoate,have been synthesized. Simultaneous thermogravimetry – differential thermal analysis (TG-DTA), X-raypowder diffractometry, infrared spectroscopy, elemental analysis and complexometry were used tocharacterize and to study the thermal behaviour of these compounds. The results led to information aboutthe composition, dehydration, thermal stability and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

11

Dametto, Patrícia Roberta, Adriano Buzutti De Siqueira, Cláudio Teodoro De Carvalho, and Massao Ionashiro. "Synthesis, characterization and thermal studies on solid state 3-methoxybenzoate of lighter trivalent lanthanides." Ecletica Quimica 32, no. 2 (2007): 17–21. http://dx.doi.org/10.26850/1678-4618eqj.v32.2.2007.p17-21.

Full text

Abstract:

Solid-state Ln -3-MeO-Bz compounds, where Ln stands for lighter trivalent lanthanides (La –Sm) and 3-methoxybenzoate, have been synthesized. Thermogravimetry (TG), differential scanningcalorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy, and complexometry were usedto characterize and to study the thermal behaviour of these compounds. The results led to informationconcerning the composition, dehydration, polymorphic transformation, thermal behaviour and thermaldecomposition of the synthesized compounds.

APA, Harvard, Vancouver, ISO, and other styles

12

Rodrigues, E. C., A. C. Vallejo, E. Y. Ionashiro, G. Bannach, and M. Ionashiro. "Synthesis, characterization and thermal behaviour of solid state compounds of 4-methoxybenzoate with Manganese, Nickel and Copper." Eclética Química 30, no. 1 (2005): 15–20. http://dx.doi.org/10.1590/s0100-46702005000100002.

Full text

Abstract:

Solid state M-L compounds, where M stands for bivalent Mn, Ni, Cu and L is 4-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry - differential thermal analysis (TG-DTA), X-ray powder diffractometry, infrared spectroscopy, elemental analysis and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, thermal stability and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

13

Dametto, P. R., A. B. Siqueira, C. T. Carvalho, and M. Ionashiro. "Synthesis, characterization and thermal studies on solid state 3-methoxybenzoate of lighter trivalent lanthanides." Eclética Química 32, no. 2 (2007): 17–21. http://dx.doi.org/10.1590/s0100-46702007000200003.

Full text

Abstract:

Solid-state Ln -3-MeO-Bz compounds, where Ln stands for lighter trivalent lanthanides (La Sm) and 3-methoxybenzoate, have been synthesized. Thermogravimetry (TG), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information concerning the composition, dehydration, polymorphic transformation, thermal behaviour and thermal decomposition of the synthesized compounds.

APA, Harvard, Vancouver, ISO, and other styles

14

De Siqueira, Adriano Buzutti, Cláudio Teodoro De Carvalho, Elias Yuki Ionashiro, and Massao Ionashiro. "Synthesis, characterization and thermal behaviour on solid pyruvates of some bivalent metal ions." Eclética Química Journal 34, no. 2 (2018): 15. http://dx.doi.org/10.26850/1678-4618eqj.v34.2.2009.p15-21.

Full text

Abstract:

Solid state M-L compounds, were M stands for bivalent Mn, Fe, Co, Ni, Cu, Zn and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry, infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, ligand denticity, and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

15

Siqueira, A. B., C. T. de Carvalho, E. C. Rodrigues, E. Y. Ionashiro, G. Bannach, and M. Ionashiro. "Synthesis, characterization and thermal behaviour on solid pyruvates of light trivalent lanthanides." Eclética Química 32, no. 4 (2007): 49–54. http://dx.doi.org/10.1590/s0100-46702007000400007.

Full text

Abstract:

Solid State Ln-L compounds, where Ln stands for light trivalent lanthanides (La - Gd) and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry, infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, ligand denticity, thermal behaviour and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

16

Siqueira, A. B., C. T. de Carvalho, E. Y. Ionashiro, and M. Ionashiro. "Synthesis, characterization and thermal behaviour on solid pyruvates of some bivalent metal ions." Eclética Química 34, no. 2 (2009): 15–21. http://dx.doi.org/10.1590/s0100-46702009000200002.

Full text

Abstract:

Solid state M-L compounds, were M stands for bivalent Mn, Fe, Co, Ni, Cu, Zn and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry, infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, ligand denticity, and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

17

De Oliveira, José Dilson Silva, Fernando Luís Fertonani, Cristo Bladimiros Melios, and Massao Ionashiro. "Thermal behaviour studies of solid state compounds of cinnamylidenepyruvate with trivalent lanthanides and yttrium (III) in an atmosphere of CO2." Ecletica Quimica 27, no. 1 (2002): 11–19. http://dx.doi.org/10.26850/1678-4618eqj.v27.1.2002.p11-19.

Full text

Abstract:

Solid state cinnamylidenepyruvate of trivalent lanthanides (except for promethium) and yttrium, were prepared. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometry were used to characterize and to study the thermal behavior of these compounds in a dynamic CO2 atmosphere. The results obtained showed significative differences on the thermal stability and thermal decomposition of these compounds, with regard to the thermal behavior study in a dynamic air atmosphere.

APA, Harvard, Vancouver, ISO, and other styles

18

De Siqueira, Adriano Buzutti, Cláudio Teodoro De Carvalho, Emanuel Carlos Rodrigues, Elias Yuki Ionashiro, Gilbert Bannach, and Massao Ionashiro. "Synthesis, characterization and thermal behaviour on solid pyruvates of light trivalent lanthanides." Ecletica Quimica 32, no. 4 (2007): 49–54. http://dx.doi.org/10.26850/1678-4618eqj.v32.4.2007.p49-54.

Full text

Abstract:

Solid State Ln-L compounds, where Ln stands for light trivalent lanthanides(La – Gd) and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermo-gravimetry (TG/DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry,infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to studythe thermal behaviour of these compounds. The results led to information about the composition, dehy-dration, ligand denticity, thermal behaviour and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

19

De Carvalho, Cláudio Teodoro, Adriano Buzutti De Siqueira, Emanuel Carlos Rodrigues, and Massao Ionashiro. "Synthesis, characterization and thermal behaviour of solid-state compounds of 2-methoxybenzoate with some bivalent transition metal ions." Ecletica Quimica 30, no. 4 (2005): 19–26. http://dx.doi.org/10.26850/1678-4618eqj.v30.4.2005.p19-26.

Full text

Abstract:

Solid-state M-2-MeO-Bz compounds, where M stands for bivalent Mn, Co, Ni, Cu and Zn and2-MeO-Bz is 2-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry-differentialthermal analysis (TG-DTA), thermogravimetry, derivative thermogravimetry (TG/DTG), differential scanningcalorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy and complexometry were used tocharacterize and to study the thermal behaviour of these compounds. The results led to have informationabout the composition, dehydration, thermal stability and thermal decomposition of the isolatedcompounds.

APA, Harvard, Vancouver, ISO, and other styles

20

Rodrigues, E. C., A. B. Siqueira, E. Y. Ionashiro, G. Bannach, and M. Ionashiro. "Synthesis, characterization and thermal behaviour of solid-state compounds of 4-methoxybenzoate with lanthanum (III) and trivalent lighter lanthanides." Eclética Química 31, no. 1 (2006): 21–30. http://dx.doi.org/10.1590/s0100-46702006000100003.

Full text

Abstract:

Solid-state M-4-MeO-Bz compounds, where M stands for trivalent La, Ce, Pr, Nd and Sm and 4-MeO-Bz is 4-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, polymorphic transformation, ligand's denticity, thermal behaviour and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

21

Nur’Adina, Hendri Faisal, and Suprianto. "Calcium Complexometry, and Lead SSA Several Water Refill Depots in Medan." Jurnal Indah Sains dan Klinis 2, no. 2 (2021): 6–11. http://dx.doi.org/10.52622/jisk.v2i2.19.

Full text

Abstract:

Calcium minerals play an important role in maintaining body functions, while Lead is a dangerous heavy metal. The research was aimed at determining the levels of Calcium and Lead from several refill water depots in Medan. Calcium complexometry and lead AAS as their respective assay methods. Research shows calcium levels are 10.3-29.3 mg/L, correlation coefficient is 0.9928, and no lead is found in refill drinking water. Calcium levels do not meet the requirements, while lead levels still meet the WHO requirements.

APA, Harvard, Vancouver, ISO, and other styles

22

Rodrigues, Érica Alvarenga Crespo, Adriano Buzutti De Siqueira, Elias Yuki Ionashiro, Gilbert Bannach, and Massao Ionashiro. "Synthesis, characterization and thermal behaviour of solid-state compounds of 4-methoxybenzoate with lanthanum (III) and trivalent lighter lanthanides." Ecletica Quimica 31, no. 1 (2006): 21–30. http://dx.doi.org/10.26850/1678-4618eqj.v31.1.2006.p21-30.

Full text

Abstract:

Solid-state M-4-MeO-Bz compounds, where M stands for trivalent La, Ce, Pr, Nd and Sm and4-MeO-Bz is 4-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry and differentialthermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry,infrared spectroscopy and complexometry were used to characterize and to study the thermal behaviour ofthese compounds. The results led to information about the composition, dehydration, polymorphic trans-formation, ligand’s denticity, thermal behaviour and thermal decomposition of the isolated compounds.

APA, Harvard, Vancouver, ISO, and other styles

23

Carvalho, C. T., A. B. Siqueira, E. C. Rodrigues, and M. Ionashiro. "Synthesis, characterization and thermal behaviour of solid-state compounds of 2-methoxybenzoate with some bivalent transition metal ions." Eclética Química 30, no. 4 (2005): 19–26. http://dx.doi.org/10.1590/s0100-46702005000400003.

Full text

Abstract:

Solid-state M-2-MeO-Bz compounds, where M stands for bivalent Mn, Co, Ni, Cu and Zn and 2-MeO-Bz is 2-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry-differential thermal analysis (TG-DTA), thermogravimetry, derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to have information about the composition, dehydration, thermal stability and thermal decomposition of the isolated compounds

APA, Harvard, Vancouver, ISO, and other styles

24

Zhai, Jingying, Xiaojiang Xie, and Eric Bakker. "Advancing Schwarzenbach's Complexometry: Nano-scale Titration Reagents Based on Heterogeneous Reactions." CHIMIA International Journal for Chemistry 68, no. 12 (2014): 899. http://dx.doi.org/10.2533/chimia.2014.899.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Panfilov, P. V., V. I. Vershinin, and V. V. Zernov. "Low-Dentate Reagents as Titrants in Complexometry: Selection of Promising Reagents." Journal of Analytical Chemistry 60, no. 12 (2005): 1118–24. http://dx.doi.org/10.1007/s10809-005-0253-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

S., Basak J. K. Monda!, S. Mukherjee S., Monda! S., and Kundu Dipali. "Homogeneity testing of china clay by complexometry and spectrophotometry using statistical technique." Journal of Indian Chemical Society Vol. 84, Apr 2007 (2007): 396–97. https://doi.org/10.5281/zenodo.5819422.

Full text

Abstract:

Analytical Chemistry Division, Central Glass and Ceramic Research Institute, Kolkata-700 032, India <em>E-mail</em> : dipali @cgcri.res.in <em>Manuscript received 23 June 2006, revised 20 February 2007, accepted 5 March 2007</em> The use of complexometry and spectrophotometry to determine homogeneity of Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub> in china clay suggeststhat the material may be considered as homogeneous with respect to Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub>•

APA, Harvard, Vancouver, ISO, and other styles

27

Locatelli, José Roberto, Cláudio Teodoro De Carvalho, Flávio Junior Caires, and Massao Ionashiro. "SYNTHESIS, CHARACTERIZATION AND THERMAL BEHAVIOUR OF HEAVY TRIVALENT LANTHANIDE MALONATES." Eclética Química Journal 35, no. 4 (2018): 93. http://dx.doi.org/10.26850/1678-4618eqj.v35.4.2010.p93-100.

Full text

Abstract:

Solid-state Ln-L compounds, where Ln stands for heavy trivalent lanthanides (Tb-Lu) and L is malonate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy, TG-FTIR system, elemental analysis and complexometry were used to characterize and to study the thermal behaviour of these compounds. The dehydration of the compounds begins at 303 K and the anhydrous compounds are stable up to 548 K. The results also provided information concerning the ligand’s denticity,

APA, Harvard, Vancouver, ISO, and other styles

28

Locatelli, J. R., C. T. Carvalho, F. J. Caires, and M. Ionashiro. "Synthesis, characterization and thermal behaviour of heavy trivalent lanthanide malonates." Eclética Química 35, no. 4 (2010): 93–100. http://dx.doi.org/10.1590/s0100-46702010000400012.

Full text

Abstract:

Solid-state Ln-L compounds, where Ln stands for heavy trivalent lanthanides (Tb-Lu) and L is malonate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy, TG-FTIR system, elemental analysis and complexometry were used to characterize and to study the thermal behaviour of these compounds. The dehydration of the compounds begins at 303 K and the anhydrous compounds are stable up to 548 K. The results also provided information concerning the ligand's denticity,

APA, Harvard, Vancouver, ISO, and other styles

29

Zulfisa Zulfisa and Lisa Agustin. "Penetapan Kadar Kalsium Pada Daun Murbei (Morus Alba L.) Secara Kompleksometri." Journal Pharma Saintika 5, no. 2 (2022): 13–19. http://dx.doi.org/10.51225/jps.v5i2.11.

Full text

Abstract:

Calcium is one of the essential nutrients that is needed for various body functions. To meet the needs of calcium, the Indonesian people generally still pay attention to the natural products contained therein. Of the many plants, one of the plants that contains calcium is mulberry leaf (Morus alba L.) which is one of the plants that grows a lot in Indonesia. The purpose of this study was to determine the level of calcium contained in mulberry leaves by complexometry. Based on the research that has been done, it can be concluded that mulberry leaves contain calcium of 0.244 % b⁄b calculated as

APA, Harvard, Vancouver, ISO, and other styles

30

Gao, Jie, Yafei Guo, Shiqiang Wang, Tianlong Deng, Yu-Wei Chen, and Nelson Belzile. "Interference of Lithium in Measuring Magnesium by Complexometry: Discussions of the Mechanism." Journal of Chemistry 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/719179.

Full text

Abstract:

There is usually a large concentration of magnesium in the brine of salt lakes and as a consequence it is difficult to measure Mg2+accurately with the complexometric titration by ethylenediaminetetraacetic acid disodium salt (EDTA) because of the large levels of Li+also coexisting in brine samples. In this study, a relationship between the relative error related to the number of drops of the indicator and the NMR spectra of anhydrous ethanol and n-butanol, with or without LiCl, was analyzed and compared. It was then possible to suggest a mechanism to explain the interference of Li+when measuri

APA, Harvard, Vancouver, ISO, and other styles

31

Primandari, S. R. P., Mulianti, A. Kaharudin, Y. Fernanda, Generousdi, and B. N. Narayanan. "Removal of Ferrous using Citric Acid in Patchouli Oil Purification by Complexometry." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 326, no. 3 (2023): 81–87. http://dx.doi.org/10.31643/2023/6445.31.

Full text

Abstract:

This study is aimed to examine citric acids as a potential chelating agent to decrease colloidal impurities in patchouli oil to improve its quality. It covers colour, specific density, refractive index, acid value, iron content, oleoresin oil content, and patchouli alcohol. Complete Randomized Design with factorial design is used with two factors and repeated 3 times. Factors are (1) citric acid concentration consists of 0.25%, 0.5%, 1.0% and 1.50% (w/v), (2) stirring time of 30, 60 and 90 minutes. Further, purified oil by citric acid was compared to purified oil by Ethylene Diamine Tetra Acet

APA, Harvard, Vancouver, ISO, and other styles

32

Carvalho, C. T. de, A. B. Siqueira, E. Y. Ionashiro, and M. Ionashiro. "Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres." Eclética Química 35, no. 4 (2010): 55–62. http://dx.doi.org/10.1590/s0100-46702010000400007.

Full text

Abstract:

Solid State M-2-MeO-CP compounds, where M stands for bivalent metals (Mn, Fe, Co, Ni, Cu and Zn) and 2-MeO-CP is 2-methoxycinnamylidenepyruvate, were synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), elemental analysis and complexometry were used to establish the stoichiometry and to study the thermal behaviour of these compounds in CO2 and N2 atmospheres. The results were consistent with the general formula: M(L)2∙H2O. In both atmospheres (CO2, N2) the thermal decomposition occurs in consecutive steps which are char

APA, Harvard, Vancouver, ISO, and other styles

33

Adli, Soumia, and Abdeljabbar Attaoui. "QUANTITATIVE DISCERNMENTS OF THE DIFFERENT CALCIUM COMPOUNDS IN THE TARFAYA OIL SHALE (MOROCCO)." International Journal of Advanced Research 11, no. 02 (2023): 981–91. http://dx.doi.org/10.21474/ijar01/16334.

Full text

Abstract:

Calcium exists in several compounds, calcite (CaCO3), dolomite (CaMg (CO3)2), calcium oxide (CaO) and calcium chloride dihydrated (CaCl2, 2H2O). All of these calcium compounds occur in oil shale. This work consists of using some physical and reaction analytical methods to try to discernthese calcium constituents quantitatively. By the methods of this work, which are the complexometry reaction using dimethyl tetra acetic acid (EDTA), the hydrochloric acid etching reaction and dispersive X-ray diffraction, we have tracked these calcium qualities. Pure calcite and pure hydrated calcium chloride w

APA, Harvard, Vancouver, ISO, and other styles

34

COSTA, Luiz Henrique Medeiros da, Francisco José Santos LIMA, and Ademir Oliveira da SILVA. "SYNTHESIS, COMPLEXOMETRY, THERMAL ANALYSIS AND MOLAR CONDUCTANCE OF LANTHANUM CHLORIDE, NEODYMIUM AND ERBIUM HYDRATED." Periódico Tchê Química 10, no. 19 (2013): 38–45. http://dx.doi.org/10.52571/ptq.v10.n19.2013.38_periodico19_pgs_38_45.pdf.

Full text

Abstract:

The lanthanum, neodymium and erbium chlorides were prepared from your respective starting oxides in aqueous suspension with slow addition of hydrochloric acid and later placed in desiccator. The compositions were characterized through of the complexometric titrations with EDTA, thermogravimetry (TG) and molar conductance. The TG curves were accomplished in synthetic air and we verified your thermal stabilities, and the process of thermal decomposition. The results obtained by the titration and for TG they made possible to establish the stoichiometry of the compounds that came as: LaCl3.7H2O, N

APA, Harvard, Vancouver, ISO, and other styles

35

De Carvalho, Cláudio Teodoro, Adriano Buzutti De Siqueira, Elias Yuki Ionashiro, and Massao Ionashiro. "SYNTHESIS, CHARACTERIZATION AND THERMAL BEHAVIOUR OF SOLID 2- METHOXYCINNAMYLIDENEPYRUVATE OF SOME BIVALENT METAL IONS IN CO2 AND N2 ATMOSPHERES." Eclética Química Journal 35, no. 4 (2018): 55. http://dx.doi.org/10.26850/1678-4618eqj.v35.4.2010.p55-61.

Full text

Abstract:

Solid State M-2-MeO-CP compounds, where M stands for bivalent metals (Mn, Fe, Co, Ni, Cu and Zn) and 2-MeO-CP is 2-methoxycinnamylidenepyruvate, were synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), elemental analysis and complexometry were used to establish the stoichiometry and to study the thermal behaviour of these compounds in CO and N atmospheres. The results were consistent with the general formula: M(L) ·H O. In 2 2 2 2 both atmospheres (CO , N ) the thermal decomposition occurs in consecutive steps which ar

APA, Harvard, Vancouver, ISO, and other styles

36

MELO, Roseane Maria de, Francisco José Santos LIMA, Ademir Oliveira da SILVA, and Cláudio César de Medeiros BRAGA. "SYNTHESIS AND CHARACTERIZATION OF LANTANIUM, NEODYMIUM AND ERBIUM MALEATES." Periódico Tchê Química 06, no. 11 (2009): 31–42. http://dx.doi.org/10.52571/ptq.v6.n11.2009.32_periodico11_pgs_31_42.pdf.

Full text

Abstract:

The lanthanium, neodymium and erbium maleates, were prepared starting from the oxides with hydrochloric acid for the formation of the salts, both in aqueous suspension, and after recrystallizade and dry, acid maleic was added. The obtained compositions were studied through the with EDTA complexometry, molar conductance thermogravimetry (TG), infrared spectroscopy, rays-X difratometry for the method of the powder and molecular modelling. The curves TG were obtained in atmosphere of synthetic air. The results made possible to establish the stochiometry and the degree of hydration of the composit

APA, Harvard, Vancouver, ISO, and other styles

37

Suciani, Ni Nyoman, Irwan Said, and Anang Wahid M. Diah. "Citric Acid Extraction in Citrus hystrix Peels as an Alternative Material for Reducing Water Hardness." Jurnal Akademika Kimia 10, no. 1 (2021): 53–58. http://dx.doi.org/10.22487/j24775185.2021.v10.i1.pp53-58.

Full text

Abstract:

Water hardness will have a destructive impact if consumed in a long time. Hard water contains high calcium contents, including inorganic calcium. The accumulation of calcium in the body at a specific time causing kidney stones, and some will settle in the blood that causing calcification which can be fatal to health. An alternative is needed to reduce the level of water hardness. This study aimed to determine the effect of using citric acid on citrus hystrix peels on water hardness. Citric acid was obtained through the maceration extraction method from citrus hystrix. The citric acid extract w

APA, Harvard, Vancouver, ISO, and other styles

38

Rodica, Somesan, Chiurciu Viorica, Barabási Ildikó, and Ognean Laurenţ. "Complexometry and ICP method relevance in calcium and magnesium content measurement of some dairy products." Journal of Biotechnology 208 (August 2015): S71. http://dx.doi.org/10.1016/j.jbiotec.2015.06.217.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Vlasák, Martin, Zuzana Luxemburková, Václav Sychra, and Miloslav Suchánek. "Complexometry with EDTA as a quality control tool for certified single-element aqueous standard solutions." Accreditation and Quality Assurance 18, no. 6 (2013): 491–99. http://dx.doi.org/10.1007/s00769-013-1010-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Abulais, Diana M., and Septiani Mangiwa. "PELATIHAN KARYA ILMIAH PADA BIDANG KIMIA BAGI SISWA SMA PGRI JAYAPURA." JURNAL PENGABDIAN PAPUA 6, no. 2 (2022): 50–54. http://dx.doi.org/10.31957/jpp.v6i2.2347.

Full text

Abstract:

Community service activities have been carried out at SMA PGRI Jayapura, Heram District, Jayapura City, Papua Province. The purpose of this service is to increase students' interest in chemistry through scientific papers training with simple research methods. The initial stage carried out in this activity is the socialization of scientific papers. The next stage is conducting simple research, processing data and training in writing scientific papers. The research topic chosen is the determination of water hardness by complexometry. During this activity the students were very enthusiastic and m

APA, Harvard, Vancouver, ISO, and other styles

41

Musiam, Siska, Siti Darmiani, and Aditya Maulana Perdana Putra. "ANALISIS KUANTITATIF KESADAHAN TOTAL AIR MINUM ISI ULANG YANG DIJUAL DI WILAYAH KAYU TANGI KOTA BANJARMASIN." Jurnal Ilmiah Manuntung 1, no. 2 (2017): 145. http://dx.doi.org/10.51352/jim.v1i2.28.

Full text

Abstract:

Water is one of the important needs for human body. Therefore, water which consumed should be healthy and have certain quality. One of its quality parameter is total hardness. Total hardness is the hardness which caused by Ca2+ and Mg2+ ions. Hard water, or water with a high level of total hardness, if consumed in long term can lead to hyperparatyroidsm, Nephrolithiasis, and musculusweakness. The aim of this study were to determine total hardness level of refill drinking waterwhich sold in Kayutangi Banjarmasin and to compare it with the standard parameter of total hardness in Permenkes 492/Me

APA, Harvard, Vancouver, ISO, and other styles

42

Chen, Wang, Tan, Hu, Sundararajan, and Zhou. "Profiling of Flavonoid and Antioxidant Activity of Fruit Tissues from 27 Chinese Local Citrus Cultivars." Plants 9, no. 2 (2020): 196. http://dx.doi.org/10.3390/plants9020196.

Full text

Abstract:

Flavonoid profile and antioxidant activity of citrus peels, pulps, and juices from 27 local citrus cultivars in China were investigated. Flavonoid composition and content were determined using UPLC-PDA. Total phenolic content (TPC) and total flavonoid content (TFC) were measured using a Folin–Ciocalteau reagent and Al(NO3)-NaNO2 complexometry, respectively. The antioxidant capacities of the extracts were evaluated by DPPH, ABTS and FRAP method, respectively. Citrus peel not only exhibited better antioxidant potential, but also presented more composition diversity and contained higher concentra

APA, Harvard, Vancouver, ISO, and other styles

43

Li, J. Z., A. W. Wei, Y. J. Zhang, et al. "The preparation of lead oxide / carbon nanotubes complex and its catalytic performance." Journal of Physics: Conference Series 2478, no. 3 (2023): 032070. http://dx.doi.org/10.1088/1742-6596/2478/3/032070.

Full text

Abstract:

Abstract The introduction of carbon nanotubes (CNTs) in the preparation of nano-lead oxide (PbO) can effectively solve the problem of easy agglomeration of nano-lead oxide. This study used concentrated nitric acid and concentrated sulfuric acid mixed acid (volume ratio 1:3) to oxidize carbon nanotubes at 90 °C temperature for 0.5 h. Using and the oxidized CNTs as carriers, Pb(OAc)2 · 3H2O as precursor, concentrated ammonia as a precipitator, PbO/CNTs complexes were prepared by chemical precipitation. Lead content of PbO/CNTs complex, determined by Complexometry, was 59.80 %(wt%), XRD and XPS c

APA, Harvard, Vancouver, ISO, and other styles

44

Katyal, N. K., S. C. Ahluwalia, R. Parkash, and R. N. Sharma. "Rapid Estimation of Free Magnesia in OPC Clinker and 3CaO:1SiO2 System by Complexometry 11Communicated by A.K. Chatterjee." Cement and Concrete Research 28, no. 4 (1998): 481–85. http://dx.doi.org/10.1016/s0008-8846(98)00027-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Marlina, Lenny, Anwar Kasim, and Tuty Anggraini. "Purification of West Pasaman Patchouli Oil by Complexometry Methods to Improve the Quality and Feasibility of the Business." AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) 9, no. 1 (2025): 220–28. https://doi.org/10.29165/ajarcde.v9i1.634.

Full text

Abstract:

This study aims to analyze the quality of purified patchouli oil, determine the most effective chelator in complexometric purification and assess the feasibility of the refining business. Patchouli oil purification was done using optimal chelating conditions identified in previous research. The chelators used were EDTA (2.5%), citric acid (2%), and tartaric acid (1.5%). The design used was a Completely Randomized Design (CRD) with one factor, namely three types of chelates with three replications. The results of testing physical and chemical properties were analyzed by ANOVA, followed by DNMRT

APA, Harvard, Vancouver, ISO, and other styles

46

A. Ali, Asaad, Tarek Ali Fahad, and Wesam A. Abdullah. "Using 5-(4-aminoantipyrineazo)-8-hyrroxyquinoline as Complexometry Reagent with Cupper (II) and Zinc (II) Ions and its Biological Activity." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 1 (2016): 3382–93. http://dx.doi.org/10.24297/jac.v11i1.2226.

Full text

Abstract:

The complexes of azo dye 5-(4-aminoantipyrineazo)-8-hyroxyquinoline (L) with cupper (II) and zinc (II) Ions were synthesized. Characterization of these azo dyes complexes have been done on the basis of elemental analysis and IR techniques. The work involves a study of optimum conditions (time, pH, sequence of addition and temperature effects) for forming the complexes. The spectra of the complexes have been studied for a range of concentrations which Lambert – Beer's law were obeyed with sensitivity of the spectrophotometric method in terms of molar absorptivity 1.6×104 and 1.2×104 l .mol-1.cm

APA, Harvard, Vancouver, ISO, and other styles

47

Adriani, Azmalina, Fauziah Fauziah, and Riki Saputra. "Analisis Kalsium (Ca) pada Ikan Petek dan Mujair dengan Metode Kompleksometri." Oceana Biomedicina Journal 2, no. 2 (2019): 91. http://dx.doi.org/10.30649/obj.v2i2.30.

Full text

Abstract:

<p><span>Fish is one ofthe example of a comestibles that contains a lot of protein and minerals, one of which is calcium. Calcium functions for the body's metabolism in the bone and tooth formation. Petek and Mujair fish contain calcium that is needed by the human body. The purpose of this study was to determine the levels of calcium contained in Petek and Mujair fish. The sampling was done by purposive sampling, which the sample used was obtained by the market in the Peunayong Banda Aceh. This research used complexometry methods. The samples of Petek and Mujair fish that had been

APA, Harvard, Vancouver, ISO, and other styles

48

N., Gopalakrishna Bhat, and Narayana B. "Indirect complexometric determination of cadmium(II) using citric acid as a masking agent." Journal of Indian Chemical Society Vol. 89, Apr 2012 (2012): 563–65. https://doi.org/10.5281/zenodo.5761575.

Full text

Abstract:

Doepartment of Chemistry, Srinivas Institute of Technology, Valachil, Mangalore-574 143, Karnataka, Ind1a Department of Chemistry, Mangalore University, Mangalagangothri-571 199, Mangalore, Karnataka. India <em>E-mail</em> : shreedakumar@yahoo.co.in <em>Manuscript received 05 October 2009, revised 07 July 2011 accepted 21 July 2011</em> An indirect complexometric method is described for the determination of cadmium(II), citric acid being used as masking agent. Cadmium(II) in a given sample solution is initially complexed with an excess of EDT A and the surplus EDTA is titrated with l

APA, Harvard, Vancouver, ISO, and other styles

49

Golik, V. I., and A. V. Titova. "An algorithm for extracting metals from natural leaching solutions of lost ores." Mining Industry Journal (Gornay Promishlennost), no. 6/2024 (December 25, 2024): 116–19. https://doi.org/10.30686/1609-9192-2024-6-116-119.

Full text

Abstract:

The article discusses a solution to the problem of extracting metals from natural leaching solutions of the offgrade ores and their mill tailings to obtain ecological and economic efficiency, the relevance of which is steadily increasing. The methodology of studying the samples includes the methods of polarographic analysis, spectrometry, chromatography, titration and complexometry, etc. Sulfate-chloride waters were studied using industrial electrodialyzers with the solution circulation through brine chambers and without it with metal extraction by sorbents. Details are provided of the scheme

APA, Harvard, Vancouver, ISO, and other styles

50

Kouassi, Kouakou Pierre, Désiré Sosthène Ronald Atto Yapi, Athanase Konin, and Abalé Martial Grehoa. "Chemical and Mineralogical Characterisation of Clayey Sands from the Ivorian Serimentaru Basin in Road Construction." European Scientific Journal, ESJ 19, no. 30 (2023): 94. http://dx.doi.org/10.19044/esj.2023.v19n30p94.

Full text

Abstract:

In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their use in road construction. Within this framework, this paper focuses on determining the chemico-mineralogical nature of the clayey sands of the localities of Bingerville and Samo, in the South-East of Ivory Coast. Tests were conducted based on the chemic

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!