A high correlation indicating for an evaluation of antioxidant activity and total phenolics content of various chilli varieties

Abstract

Use of dimethyl sulfoxide (DMSO) as a suitable extraction solvent under the optimum conditions of microwave assisted extraction (MAE) prior to total phenolics determination and antioxidant activity assay was conducted. The MAE method was done with 0.05 g sample in 10 mL DMSO at 500 W within 5 min. The effects of DMSO on various antioxidant activities using DPPH(·+), DMPD(·+), ABTS(·+) and FRAP, and Folin-Ciocalteu reagent were investigated. From the results, it is clearly demonstrated that the DMSO itself shows no effect on any of those antioxidant assays including total phenolics content. The DMSO extracts of 14 local chilli varieties gave their antioxidant activities in the following ranges: DPPH, 3.07-20.0; DMPD, 1.52-6.61; ABTS, 20.4-56.0; FRAP, 8.98-42.1 mg GA/g DW. Their total phenolics contents were found in the range of 53.7-200 mg GA/g DW. This study demonstrates that DMSO was found as the most suitable extraction solvent for antioxidants and phenolics from chilli. In addition, analysis of the data obtained among four antioxidant activity assays with respect to total phenolics shows a highly significant and positive regression coefficient (r > 0.92), indicating the total phenolics are primarily responsible for their antioxidant activity of the chilli extract.

Synthesis and characterization of a polyurethane carrier used for a prolonged transmembrane transfer of a chili pepper extract

“…Polyurethane carrier used for chili pepper extract solubilized in 10 mL solvent (70% ethanol) and was heated in a microwave-assisted extraction (500 W for 5 minutes) according to a procedure described in the literature. 19,20 The extract was cooled and centrifuged at 4,000 rpm for 10 minutes.…”

New approach applying a pet fish air pump in liquid‐phase microextraction for the determination of Sudan dyes in food samples by HPLC

“…The result of sample preparation is discussed and shown in Supporting Information, Fig. S3, S4, and Table S1 .…”

Variability in the Phytochemical Contents and Free Radical‐Scavenging Capacity of Capsicum annuum var. glabriusculum (Wild Piquin Chili)

“…In addition, these phytochemicals also possess antimicrobial, antiviral, anti‐inflammatory, anticarcinogenic and antidiabetic properties, as well as gastrointestinal benefits . These properties have been applied to the food, pharmaceutical and cosmetic industries; therefore, the demand for chili as a raw material has recently increased by ∼6% …”

“…[6] These properties have been applied to the food, pharmaceutical and cosmetic industries; therefore, the demand for chili as a raw material has recently increased by~6%. [7] Metabolites display accumulation patterns that generally depend on the environment and genotype, generating a wide sensorial variation within the genus. [8] Several studies have shown the pharmaceutical potential of Capsicum, particularly in commercial cultivars of Capsicum annuum L. [9] and in highly pungent genotypes of C. chinense JACQ.…”