Annals of Advances in Chemistry
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Published By Heighten Science Publications Corporation

2576-3768
Updated Friday, 22 October 2021

2021 ◽  
Vol 5 (1) ◽  
pp. 013-018
Author(s):  
Verushkin Aleksey G ◽  
Kulikov Artem Yu ◽  
Kutsanyan Andranik A

A micellar thin-layer chromatography method for the quantitative determination and validation of coumarin in Meliloti herba and its ethanolic extracts was developed and validated. For achieving good determination, the mobile phase of 5 x 10-4 mol/L Tween-80 in a mixture propanol-2 – water (5:95 v/v) was used. Densitometric determination was carried out at 275 nm. The calibration curve was linear in the range of 0.1-2.5 μg per band. The proposed method is simple, rapid, precise and accurate; replacing hazardous solvents by greener ones correspond to the modern requirements in “Green chemistry” concepts. The obtained data can be used for the routine analysis of coumarin in medical plant and extracts.


2021 ◽  
Vol 5 (1) ◽  
pp. 004-012
Author(s):  
E Ibrahim Adel ◽  
Elhenawee Magda ◽  
Saleh Hanaa ◽  
M Sebaiy Mahmoud

This literature review is concerning with liquid chromatography specifically high performance liquid chromatography (HPLC), Ultra high performance liquid chromatography (UHPLC), chromatography theory, chromatographic parameters, monolithic columns, principles of green chemistry and its application ingreen chromatography.


2021 ◽  
Vol 5 (1) ◽  
pp. 001-003
Author(s):  
Kaminsky Walter

In recent years polyolefin nanocomposites are of great interest because of their high potential as materials with novel properties [1,2].


2020 ◽  
Vol 4 (1) ◽  
pp. 001-002
Author(s):  
Rani Jhansi

A balance response is the point at which a corrosive and a base respond to shape water and a salt and includes the mix of H+ particles and OH-particles to produce water. The balance of a solid corrosive and solid base has a pH equivalent to 7.


2019 ◽  
pp. 001-006
Author(s):  
Anna M Michałowska-Kaczmarczyk ◽  
Tadeusz Michałowski*

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