Phytochemical screening and determination of minerals and heavy metals in the flowers of Nyctanthes arbor-tristis L

Abstract

Dried powder of the flowers of Nyctanthes arbor-tristis L. was analyzed for phytochemical screening, proximate compositions, mineral constituents and heavy metals analysis. The phytochemical screening indicated the presence of carbohydrates, flavonoids, glycosides, cardiac glycosides, reducing sugar, saponins, steroids, tannins and terpenoids. Alkaloids, anthraquinones and phlobatannins were absent. The proximate compositions was found to be high in moisture content (92.27 ± 0.09 %), the ash content was found to be (0.53 ± 0.02 %) while the protein content was 0.97 ± 0.05 % by fresh weight basis. The air dried flowers sample revealed highest in oxygen content (50.16 %) and lowest in sulfur content (0.10%). A total of six anions were analyzed. The sample was found rich in fluoride (94.87 ± 2.501 mg/Kg) and sulfate (165.24 ± 5.14 mg/Kg) content. A total of fifteen metals were analyzed. Heavy metals such as Pb, Cd, Hg, Cr and As were found in trace amounts, which were within the acceptable limits according to WHO and FAO.

Fatty acid analysis, cytotoxicity, antimicrobial and antioxidant activities of different extracts of the flowers of Nyctanthes arbor-tristis L.

“…showed the presence of tannins, flavonoids, carbohydrates, (Haque et al, 2019). So, the present study indicates that the flower of Nyctanthes arbor-tristis L. has the potential to be a good source of natural antioxidants.…”

“…Flowers of Nyctanthes arbor-tristis were collected from BCSIR campus, Dhaka, Bangladesh. The flowers were dried, powdered and extracted successively with n-hexane, dichloromethane, ethyl acetate and methanol at room temperature according to the published procedure (Haque et al, 2019). The resulting extracts were filtered, concentrated, dried and stored in a desiccator for use in subsequent experiments.…”

Phytochemical, Antioxidant and Trace Element Analysis of Hypericum japonicum Thunb.

“…[16] However, there are many studies done by different authors showing very similar results concluding the concentrations of heavy metals with significantly less concentrations in medicinal plants. [11,[52][53][54]…”

Phytochemical Profiling, Biological Activities and In Silico Virtual Screening of Bioactive Compounds ofTrichodesma Indicum(L) R. Br. Extracts

“…A qualitative study of phytochemicals of T. indicum fractions revealed the presence of a good profile of phytoconstituents i.e., flavonoids, phenolics, tannins, carbohydrates, steroids, terpenoids, and glycosides which were confirmed by the following method. [19] The total phenolic level identified in chloroform and ethyl acetate fractions of T. indicum was 499.80 � 5.23 mg gallic acid equivalent g-1 and 744.65 � 4.46 mg gallic acid equivalent g-1. The identified flavonoid contents in the same fractions were 42.48 � 1.99 mg catechin equivalent g-1 and 55.02 � 0.33 mg catechin equivalent g-1 respectively in the dry fractions.…”

“…The preliminary phytochemical analysis of the chloroform and ethyl acetate fractions of T. indicum (L) was performed by following standard protocols described [19,44] …”