Determination of trace level carbonate ion in Mg–Al layered double hydroxide: Its significance on the anion exchange behaviour

Chakraborty, Jayanta; Sengupta, Somoshree; Dasgupta, Sudip; Chakraborty, Manjusha; Ghosh, Swapankumar; Mallik, Sudipta; Das, Kamal Lal; Basu, Debabrata

doi:10.1016/j.jiec.2012.06.020

Cited by 20 publications

(14 citation statements)

References 20 publications

(28 reference statements)

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“…Estimation of carbonate anion in the CaAl‐LDH samples (samples A, B, and C) has been undertaken, based on the ion exclusion chromatographic technique for weakly dissociated acids (e.g., H 2 CO 3 acid here) as analytes . Analogous to our previous work, as the detection of the carbonate anion, in the nonsuppressed mode of analysis was not possible due to its poor conductivity, the analysis was carried out following inverse chemical suppression technique, using 25 mmol L −1 LiCl as regenerating solution.…”

Section: Discussionmentioning

confidence: 99%

“…Estimation of carbonate anion in the CaAl-LDH samples (samples A, B, and C) has been undertaken, based on the ion exclusion chromatographic technique 45 for weakly dissociated acids (e.g., H 2 CO 3 acid here) as analytes. 26 Analogous to our previous work, as the detection of the carbonate anion, in the nonsuppressed mode of analysis was not possible due to its poor conductivity, the analysis was carried out following inverse chemical suppression technique, using 25 mmol L À1 LiCl 46 as regenerating solution. An enhanced order of the carbonate anion concentration (ppm) from samples A to C could be attributed to the higher concentration of the OH À ions at higher pH conditions, influencing the kinetics of the forward reaction leading to the precipitation of the calcium hydroxide and subsequently calcium carbonate, on account of the incorporation of the carbonate anion via inclusion phenomenon, as abovesaid, exhibiting an enhanced concentration, finally.…”

Section: Discussionmentioning

confidence: 99%

“…The concentration of the trace level carbonate ion in the samples A, B, and C and the nitrogen (XL grade, 99.99% pure) gas purged aqueous medium were measured using ion chromatography (792 Basic IC, Metrohm AG, Herisau, Switzerland) and a Metrosep Organic Acids-250 (6.1005.200), Metrohm, Switzerland, separation column comprising polystyrene divinyl benzene copolymer with sulfonic acid groups as carrier material (column dimension: 250 9 7.8 mm), as has been published in our previous work. 26 A thermostated conductivity detector, attached to the IC stated as above, having a cell volume of 1.5 mL, measuring alternating current in the conductivity range 0-1000 mS cm À1 at 1 kHz, has been used for detection of the trace level ions in the analyte. The machine was calibrated using standard solutions of sodium carbonate at the concentration range 0.5-20 ppm, against the retention time, obtaining the calibration curve with 5 known concentrations against individual peak area derived from the chromatograms ( Figure 6A).…”

Section: Determination Of Trace Level Carbonate Ion (Ppm) In Samplementioning

confidence: 99%

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pH‐dependent facile synthesis of CaAl‐layered double hydroxides and its effect on the growth inhibition of cancer cells

et al. 2018

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The present communication reports a pH‐dependent facile synthesis of calcium aluminum layered double hydroxide (CaAl‐LDH), at 3 different pH conditions of 8.5, 10.5 and 12.5 respectively, by simple coprecipitation route that led to the precipitation of the same in phase pure or in mixed phase form, and their detail characterization. Interestingly, at a pH of 8.5, the precipitate obtained was 100% phase pure CaAl‐LDH, represented as sample A, whereas, at higher pH conditions, a mixed phase comprising 37% of a combination of CaCO3 polymorphs, e.g., calcite and aragonite and 63% of the CaAl‐LDH (at pH 10.5, represented as sample B) and 43% of a combination of calcite and aragonite and the rest 57% being CaAl‐LDH (at pH 12.5, represented as sample C) respectively, were obtained. The increasing trend of the presence of carbonate anion (with reference to calcite and aragonite phases) was estimated by trace level ion‐exchange chromatography study using organic acid column. All the above samples were tested for their anticancer activity in vitro, using cancer cell lines, e.g., human colon carcinoma (HCT116) and human breast adenocarcinoma (MCF7). Interestingly, sample A only exhibited significant growth inhibition of the cancer cells as above‐mentioned. The observation as above was verified using human osteoblast precursor cells (MC3T3) as well, on which, all the samples (sample A, sample B and sample C) exhibited good cellular viability.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Determination Of Trace Level Carbonate Ion (Ppm) In Samplementioning

confidence: 99%

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pH‐dependent facile synthesis of CaAl‐layered double hydroxides and its effect on the growth inhibition of cancer cells

et al. 2018

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“…A number of methods have been described in literature, and most of them are based on chemical composition analysis, such as Inductively coupled plasma atomic emission spectroscopy, Ion chromatographic technique. [12][13][14] These methods involved in a series of analytical techniques, such as ashing and dissolution, which make their testing complicated and lab intensive. Fourier transform infrared (FTIR) spectrometry is frequently utilized to characterize LDHs, especially to analyze the interlayer anions.…”

Section: Introductionmentioning

confidence: 99%

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Liu

et al. 2021

ChemistrySelect

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The determination of carbonate content is the basic procedure for studies related to layer double hydroxides (LDHs). This paper reports a rapid and accurate headspace gas chromatographic (HS-GC) technique for the determination of carbonate content in LDHs. The content of carbonate was expressed by the amount of CO 2 generated by the reaction of sulfuric acid and carbonate, which can be measured by HS-GC technique using a thermal conductivity detector. It was found that a complete conversion of carbonate to CO 2 can be achieved at 45°C for about 4 min and a sulfuric acid dosage of 200 μL in the headspace vial. Under optimized conditions, the limit of detection and relative standard deviation of HS-GC method is 0.79 μmol and 1 %, respectively.

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“…The thermal behavior of LDHs intercalated with carbonate ion is generally characterized by two steps. The first one is an endothermic process at lower temperature where weight losses are caused by the removal of surface water and interlayer water [6][7][8]. This is the dehydration reaction of LDHs.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis On The Kinetics Of Magnesium-Aluminum Layered Double Hydroxides In Different Heating Rates

Yu¹,

Meiling²,

Xu³

et al. 2015

Archives of Metallurgy and Materials

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The thermal decomposition of magnesium-aluminum layered double hydroxides (LDHs) was investigated by thermogravimetry analysis and differential scanning calorimetry (DSC) methods in argon environment. The influence of heating rates (including 2.5, 5, 10, 15 and 20K/min) on the thermal behavior of LDHs was revealed. By the methods of Kissinger and Flynn-Wall-Ozawa, the thermal kinetic parameters of activation energy and pre-exponential factor for the exothermic processes under non-isothermal conditions were calculated using the analysis of corresponding DSC curves.

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Determination of trace level carbonate ion in Mg–Al layered double hydroxide: Its significance on the anion exchange behaviour

Cited by 20 publications

References 20 publications

pH‐dependent facile synthesis of CaAl‐layered double hydroxides and its effect on the growth inhibition of cancer cells

pH‐dependent facile synthesis of CaAl‐layered double hydroxides and its effect on the growth inhibition of cancer cells

Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides

Thermal Analysis On The Kinetics Of Magnesium-Aluminum Layered Double Hydroxides In Different Heating Rates

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