scholarly journals HPLC-DAD-ESI-MS Analysis for Simultaneous Quantitation of Phenolics in Taiwan Elderberry and Its Anti-Glycation Activity

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3861
Author(s):  
Ho-Shin Huang ◽  
Hsu-Sheng Yu ◽  
Chia-Hung Yen ◽  
Ean-Tun Liaw
Keyword(s):  
High Performance ◽  
Methanol Extract ◽  
Limit Of Detection ◽  
Total Phenolic ◽  
Photodiode Array Detection ◽  
Esi Ms ◽  
Relative Standard ◽  
Photodiode Array ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

Sambucus formosana is most commonly used as a traditional herb medicine in Taiwan. In this study, high performance liquid chromatography equipped with photodiode array detection-mass (HPLC–DAD-ESI-MS) method was developed for the identification and quantification of bioactive phenolics. The developed method was also validated for accuracy, precision, limit of detection, and quantification. In this method, chlorogenic acid, rutin, isoquercetrin, nictoflorin, astragalin, and quercetin were quantified in linearity range of 10–100 (μg/mL) with a correlation coefficient of greater than 0.996. High recovery (86.5–93.1%) and good reproducibility were obtained for six phenolics with the relative standard deviation ranging from 1.7–3.1%. Therefore, the proposed method for simultaneous quantification of six bioactive phenolics in the extract and fractions of S. formosana using HPLC–DAD-ESI-MS detection under the optimized conditions is accurate and validated. Among the results, methanol extract showed the greatest values of total phenolic content (93.1 mg gallic acid equivalent/g). Additionally, the methanol extract revealed best antioxidant capacity based on the DPPH scavenging activity and anti-glycation activity (IC50 was observed at 97.1 and 77.9 μg/mL, respectively).

scholarly journals Antimicrobial, Antioxidant and Cytotoxic Activities of Glochidion multiloculare (Roxb. ex Willd.) Müll. Arg. (Euphorbiaceae)

2013 ◽  
Vol 11 (2) ◽  
pp. 117-120
Author(s):  
ATM Zafrul Azam ◽  
Abdullah Al Hasan ◽  
Md Gias Uddin ◽  
Mohammad Mehedi Masud ◽  
Choudhury Mahmood Hasan
Keyword(s):  
Brine Shrimp ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Cytotoxic Activities ◽  
Ic50 Value ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging ◽  
Liquid Chromatographic

The methanol extract (ME) of the powdered bark of Glochidion multiloculare and its six vacuum liquid chromatographic (VLC) fractions (Fa-f) were investigated for antimicrobial, cytotoxic and antioxidant activities. Only fractions Fc and Fd showed mild antimicrobial activity. Significant free radical (DPPH) scavenging activity was found in Ff (IC50 value = 9.27±0.117 ?g/ml). The total phenolic content was measured involving Folin-Ciocalteu reagent and it was the highest in fraction Fe (187.00±1.74 mg of GAE/gm of sample). Cytotoxicity (LC50) by brine shrimp lethality bioassay was found to be significant for Fb (0.023±0.001 ?g/ml), Fc (0.3±0.01 ?g/ml) and Fd (0.117±0.0015 ?g/ml). DOI: http://dx.doi.org/10.3329/dujps.v11i2.14560 Dhaka Univ. J. Pharm. Sci. 11(2): 117-120, 2012 (December)

Determination of Organic Impurities in Anthraquinone Color Additives D&C Violet No. 2 and D&C Green No. 6 by Ultra-High Performance Liquid Chromatography

2017 ◽  
Vol 100 (1) ◽  
pp. 230-235 ◽  
Author(s):  
H H Wendy Yang
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Correlation Coefficients ◽  
Photodiode Array Detection ◽  
Time Saving ◽  
Organic Impurities ◽  
Relative Standard ◽  
Photodiode Array ◽  
Color Additive

Abstract A new practical and time-saving ultra-high performance liquid chromatography (UHPLC) method has been developed for determining the organic impurities in the anthraquinone color additives D&C Violet No. 2 and D&C Green No. 6. The impurities determined are p-toluidine, 1-hydroxyanthraquinone, 1,4-dihydroxyanthraquinone, and two subsidiary colors. The newly developed UHPLC method uses a 1.7-μ particle size C-18 column, 0.1 M ammonium acetate and acetonitrile aseluents, and photodiode array detection. For the quantification of the impurities, six-point calibration curves were used with correlation coefficients that ranged from 0.9974 to 0.9998. Recoveries of impurities ranged from 99 to 104%. Relative standard deviations ranged from 0.81 to 4.29%. The limits of detection for the impurities ranged from 0.0067% to0.216%. Samples from sixteen batches of each color additive were analyzed, and the results favorably compared with the results obtained by gravity-elution column chromatography, thin-layer chromatography, and isooctane extraction. Unlike with those other methods, use of the UHPLC method permits all of the impurities to be determined in a single analysis, while also reducing the amount of organic waste and saving timeand labor. The method is expected to be implemented by the U.S. Food and Drug Administration for analysis of color additive samples submitted for batch certification.

scholarly journals Determination of Plant Hormones in Fertilizers by High-Performance Liquid Chromatography with Photodiode Array Detection: Method Development and Single-Laboratory Validation

2008 ◽  
Vol 91 (6) ◽  
pp. 1245-1256 ◽  
Author(s):  
Grazia Laura Gambino ◽  
Pietro Pagano ◽  
Monica Scordino ◽  
Leonardo Sabatino ◽  
Emanuele Scollo ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Butyric Acid ◽  
Plant Hormones ◽  
High Performance ◽  
Photodiode Array Detection ◽  
Relative Standard ◽  
Photodiode Array ◽  
Array Detection ◽  
Concentration Levels

Abstract A simple and reliable high-performance liquid chromatographic method that uses photodiode array detection was developed for the simultaneous determination of 12 native and synthetic plant hormones, i.e., plant growth regulators (PGRs), in fertilizers, such as 1-naphthol, 2,4-dichlorophenoxyacetic acid, 4-(2,4-dichlorophenoxy)butyric acid, 4-chlorophenoxyacetic acid, indole-3-acetic acid, 4-(3-indolyl)butyric acid, dichlorprop, (4-chloro-2-methylphenoxy)acetic acid, -naphthaleneacetic acid, 1-naphthaleneacetamide, -naphthoxyacetic acid, and thidiazuron. The method was experimentally validated for routine regulatory application, and the following analytical parameters were assessed for all PGRs studied: linearity; specificity; precision (relative standard deviation) and accuracy, both measured at 3 concentration levels (0.1, 0.05, and 0.01, w/w); ruggedness; limit of detection; and limit of quantification. Results were satisfactory for all method validation parameters tested and for all PGRs studied, demonstrating the suitability of the method for the determination of PGRs in fertilizers. The uncertainty of measurement was also estimated at 3 concentration levels for all PGRs by using the approach of the International Organization for Standardization, described in its Guide to the Expression of Uncertainty in Measurement. The method was applied to 20 samples of liquid fertilizer with declared biostimulant properties.

Determination of patulin and hydroxymethylfurfural in beverages by UPLC-PDA

2020 ◽  
pp. 1-8
Author(s):  
M. Pernica ◽  
J. Martiník ◽  
R. Boško ◽  
V. Zušťáková ◽  
K. Benešová ◽  
...  
Keyword(s):  
High Performance ◽  
Limit Of Detection ◽  
Penicillium Expansum ◽  
Limit Of Quantification ◽  
Accuracy And Precision ◽  
Relative Standard ◽  
Validation Parameters ◽  
Photodiode Array ◽  
Quantification Accuracy

The present study describes using molecularly imprinted polymer (MIP) technology for determination of patulin (PAT) and 5-hydroxymethylfurfural (5-HMF) in beverages by ultra-high performance liquid chromatography coupled to photodiode array (UPLC-PDA). PAT (4-hydroxy-4H-furo[3,2-c]pyran-2(6H)-one) is a mycotoxin produced by Penicillium fungi and Penicillium expansum is probably the most commonly encountered species that infects apples during their growth, harvest, storage or processing. The occurrence of PAT as a natural contaminant of apples is a worldwide problem. 5-HMF (also known as 5-(hydroxymethyl) furan-2-carbaldehyde), is formed in the Maillard reaction as well as during caramelisation. It is a good storage time-temperature marker and flavour indicator, especially in beverages such as wine, beer, but also cider and apple juice which may contain PAT. PAT and 5-HMF were separated within 2 min using a Luna Omega C18 column and the PDA detector wavelength was set to 276 nm. The validation parameters of the analytical method such as linearity, limit of detection, limit of quantification, accuracy and precision were tested. The calibration curves were linear at least in the range 50-1000 ng/ml with a good linearity (R2>0.999) for both analytes, the limit of detection and the limit of quantification for PAT and 5-HMF were in the range 4.9-6.6 and 16.1-21.8 μg/l, respectively. The recoveries of the selected analyte were in the range 61.9-109.0% with a precision of <8.2% (relative standard deviation (RSD)) for PAT and in the range 50.8-98.0% with a precision of <10.0% (RSD) for 5-HMF. The validated procedure was successfully applied for the analysis of PAT and 5-HMF in beverages from retail shops.

scholarly journals GC-MS Based Metabolite Profiling, Antioxidant and Antimicrobial Properties of Different Solvent Extracts of Malaysian Plectranthus amboinicus Leaves

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Mallappa Kumara Swamy ◽  
Greetha Arumugam ◽  
Ravinder Kaur ◽  
Ali Ghasemzadeh ◽  
Mazina Mohd. Yusoff ◽  
...  
Keyword(s):  
Methanol Extract ◽  
Antimicrobial Properties ◽  
Dry Weight ◽  
Acetone Extract ◽  
Total Phenolic ◽  
E Coli ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging ◽  
Plectranthus Amboinicus ◽  
Acetone Extracts

This study evaluates the phytochemistry, antioxidant, and antimicrobial effects of Plectranthus amboinicus leaves extracted in different solvents. The methanol extract contained the highest total phenolic (94.37±1.24 mg GAE/g) and flavonoid contents (26.90±1.35 mg RE/g) and exhibited the highest DPPH scavenging activity (90.13 ± 3.32%) followed by the acetone extract (80.23 ± 3.26%) at 500 μg/mL concentration. Similarly, the highest ferric ion reduction potential (849.63±30.95 μM of Fe (II)/g dry weight) was exhibited by the methanol extract followed by the acetone extract (695.92±25.44 μM of Fe (II)/g dry weight). The methanol extract showed greater antimicrobial activity against all the tested pathogens (Bacillus subtilis, Methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Candida albicans). However, both hexane and acetone extracts failed to inhibit E. coli. S. aureus and C. albicans were more susceptible to all the extracts. Further, GC-MS analysis confirmed the occurrence of a total 46 phytocompounds in different solvent extracts. Some of the major compounds included carvacrol (37.7%), tetracontane (16.6%), squalene (15.6%), tetrapentacontane (13.7%), and Phytol (12.9%). In conclusion, extraction solvents influenced the recovery of phytocompounds and the highest pharmacological activities of the methanol extract could be correlated to the presence of additional bioactive compounds.

scholarly journals Quantitative Analysis of 18 Marker Components in the Traditional Korean Medicine, Cheongsangbangpung-Tang, Using High-Performance Liquid Chromatography Combined with Photodiode Array Detector

2020 ◽  
Vol 11 (1) ◽  
pp. 14
Author(s):  
Chang-Seob Seo ◽  
Hyeun-Kyoo Shin
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Limit Of Detection ◽  
Array Detector ◽  
Photodiode Array Detection ◽  
Limit Of Quantification ◽  
Novel Approach ◽  
The Face ◽  
Photodiode Array

Cheongsangbangpung-tang (CSBPT) is a traditional herbal medicine that has been used in many regions of Asia, including Korea, China, and Japan, for the treatment of purulent inflammation and eczema on the face. In this study, a method for the simultaneous analysis of 18 marker components, geniposide (1), coptisine chloride (2), prim-O-glucosylcimifugin (3), berberine chloride (4), liquiritin apioside (5), liquiritin (6), ferulic acid (7), narirutin (8), 5-O-methylvisammisoide (9), hesperidin (10), arctigenin (11), baicalin (12), oxypeucedanin hydrate (13), wogonoside (14), baicalein (15), arctiin (16), glycyrrhizin (17), and pulegone (18), was developed for quality control of CSBPT. The novel approach, which is based on high-performance liquid chromatography (HPLC) separation coupled with photodiode array detection, was verified by the assessment of linearity, limit of detection, limit of quantification, accuracy, recovery, and precision. Analysis of CSBPT by using the established assay revealed that compounds 1–18 were present in concentrations of 0.27–18.31 mg/g.

Calcium/Copper alginate framework doped with CuO nano-particles as a novel adsorbent for micro-extraction of benzodiazepines from human serum

2020 ◽  
Vol 16 ◽  
Author(s):  
Nadereh Rahbar ◽  
Fatemeh Ahmadi ◽  
Zahra Ramezani ◽  
Masoumeh Nourani
Keyword(s):  
Human Serum ◽  
High Performance ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Nano Particles ◽  
Limit Of Quantification ◽  
Analytical Methodology ◽  
Fiber Fabrication ◽  
Relative Standard ◽  
Green Procedure

Background: Sample preparation is one of the most challenging phases in pharmaceutical analysis, especially in biological matrices, affecting the whole analytical methodology. Objective: In this study, a new Ca(II)/Cu(II)/alginate/CuO nanoparticles hydrogel fiber (CCACHF) was synthesized through a simple, green procedure and applied for fiber micro solid phase extraction (FMSPE) of diazepam (DIZ) and oxazepam (OXZ) as model drugs prior to high-performance liquid chromatography-UV detection (HPLC-UV). Methods: Composition and morphology of the prepared fiber were characterized and the effect of main parameters on the fiber fabrication and extraction efficiency have been studied and optimized. Results: In optimal conditions, calibration curves were linear ranging between 0.1–500 µg L−1 with regression coefficients of 0.9938 and 0.9968. Limit of detection (LOD) (S/N=3) and limit of quantification (LOQ) (S/N=10) of the technique for DIZ and OXZ were 0.03 to 0.1 µg L−1. Within-day and between-day relative standard deviations (RSDs) for DIZ and OXZ were 6.0–12.5% and 3.3–9.4%, respectively. Conclusion: The fabricated adsorbent has been substantially employed to extraction of selected benzo-diazepines (BZDs) from human serum real specimens and the obtained recoveries were also satisfactory (82.1-109.7%).

scholarly journals A highly sensitive octopus-like azobenzene fluorescent probe for determination of abamectin B1 in apples

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhenlong Guo ◽  
YiFei Su ◽  
Kexin Li ◽  
MengYi Tang ◽  
Qiang Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Limit Of Detection ◽  
Quantitative Detection ◽  
Fluorescence Signal ◽  
Ionization Mass ◽  
Limit Of Quantification ◽  
Visible Absorption ◽  
Esi Ms ◽  
Relative Standard ◽  
Ft Ir

AbstractThe development of detecting residual level of abamectin B1 in apples is of great importance to public health. Herein, we synthesized a octopus-like azobenzene fluorescent probe 1,3,5-tris (5′-[(E)-(p-phenoxyazo) diazenyl)] benzene-1,3-dicarboxylic acid) benzene (TPB) for preliminary detection of abamectin B1 in apples. The TPB molecule has been characterized by ultraviolet–visible absorption spectrometry, 1H-nuclear magnetic resonance, fourier-transform infrared (FT-IR), electrospray ionization mass spectroscopy (ESI-MS) and fluorescent spectra. A proper determination condition was optimized, with limit of detection and limit of quantification of 1.3 µg L−1 and 4.4 μg L−1, respectively. The mechanism of this probe to identify abamectin B1 was illustrated in terms of undergoing aromatic nucleophilic substitution, by comparing fluorescence changes, FT-IR and ESI-MS. Furthermore, a facile quantitative detection of the residual abamectin B1 in apples was achieved. Good reproducibility was present based on relative standard deviation of 2.2%. Six carboxyl recognition sites, three azo groups and unique fluorescence signal towards abamectin B1 of this fluorescent probe demonstrated reasonable sensitivity, specificity and selectivity. The results indicate that the octopus-like azobenzene fluorescent probe can be expected to be reliable for evaluating abamectin B1 in agricultural foods.

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