The Effect of Treatment with Hydrogen Peroxide and the Mehra–Jackson Reagent on X-ray Diffraction Patterns of Clay Fractions

Соколова, Т. А.; Tolpeshta, I. I.; Izosimova, Yu. G.; Umnova, V. A.; Lashukov, P. V.

doi:10.1134/s1064229317120092

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…Furthermore, several aromatic organic compounds may be removed by H 2 O 2 as well, for example, phenolic compounds adsorbed to clay were oxidized directly, while those containing groups tended not to be reactive towards H 2 O 2 (Andreozzi et al, 2002) . The series of kaolinite purification steps ended with the dispersion into a sodium citrate-dithionite-bicarbonate to allow the dissolution of iron oxides from kaolinite faces (Eusterhues et al, 2003;Sokolova et al, 2017). The purified kaolinite was then activated to metakaolin by the calcination with overall reactions, expressed by equations below:…”

Section: Preparation Of Kaolinite-based Sc and Its Derivatives With C...mentioning

confidence: 99%

Modification of Indonesian Kaolinite-Based Silica Coarse (SC) for RNA Extraction Method of SARS-CoV-2

Marintan,

Sjatha,

Nurani

et al. 2024

Sci. Technol. Indones

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One of the strategies to overcome the COVID-19 disease is through rapid diagnostic tests using the Reverse-Transcriptase Polymerase Chain Reaction (RT-PCR) test. The RT-PCR test is a detection and quantification test of nucleic acids, initiated by the pre-analytical step of purification of the nucleic acids. Purification of nucleic acid requires silica-based materials as a solid phase-extraction matrix or column. Herein, Silica Coarse (SC) in the form of suspension and powder columns; was prepared from natural Indonesian Kaolinite as an alternative extraction column to binding RNA of SARS-CoV-2. The RNA binding and releasing ability in SC was enhanced with the support of chaotropic agents in the form of Na+ and Guanidium+ as charged balancing cations, embedded in the silicate layer inside the kaolinite framework. SC, which has been supported with Na+ and Guanidium+ respectively, then studied its physicochemical characteristics using FTIR spectroscopy, X-ray diffraction technique, scanning electron microscopy, and BET surface area and pore size measurement. This work shows that the modified SC suspension column could extract RNA of SARS-CoV-2 that amplified better in the RT PCR test than SC powder columns, with the initial Ct value of all the SARS-CoV-2 specimens in the range < 20.

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Section: Preparation Of Kaolinite-based Sc and Its Derivatives With C...mentioning

confidence: 99%