HPLC Determination of the Major Active Flavonoids and GC-MS Analysis of Volatile Components ofDysphania graveolens(Amaranthaceae)

2012 ◽  
Vol 24 (3) ◽  
pp. 248-254 ◽  
Author(s):  
Harry Álvarez-Ospina ◽  
Isabel Rivero Cruz ◽  
Georgina Duarte ◽  
Robert Bye ◽  
Rachel Mata
Keyword(s):  
Hplc Determination ◽  
Volatile Components ◽  
Ms Analysis

scholarly journals Determination of Volatile Compounds in Nut-Based Milk Alternative Beverages by HS-SPME Prior to GC-MS Analysis

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3091 ◽  
Author(s):  
Natalia Manousi ◽  
George A. Zachariadis
Keyword(s):  
Volatile Compounds ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Ms Analysis ◽  
Salt Addition ◽  
Compositional Changes ◽  
Optimum Extraction ◽  
Technological Treatment

A reliable Headspace-Solid Phase Microextraction (HS-SPME) method was developed for the determination of polar volatile components of commercial nut-based milk alternative drinks prior to Gas Chromatography–Mass Spectrometry (GC-MS) analysis. Under the optimum extraction conditions, a divinylbenzene (DVB)/Carboxen™ CAR)/polydimethylsiloxane (PDMS) fiber was used and 2 mL of sample was heated at 60 °C for 40 min under stirring, without salt addition. Ten compounds from different chemical classes (heptane, a-pinene, toluene, 2-methylpyrazine, 3-heptanone, heptanal, 2-octanone, 1-heptanol, benzaldehyde and 1-octanol) were chosen as model analytes for quantification. Limits of detection and limits of quantification were found to be 0.33–1.67 ng g−1 and 1–5 ng g−1, accordingly. Good linearity, precision and accuracy were obtained as well as a wide linear range. The proposed method was successfully applied to various beverages including almond milk, walnut milk, peanut milk and almond chocolate milk. More than 70 volatile compounds were detected in the different samples. Most of the detected volatiles were aldehydes, ketones and alcohols. This technique can be used for the determination of volatile compounds in nut-based beverages, to detect compositional changes during storage and technological treatment used for their production.

HPLC determination of iridoids, flavonoids and a phenylpropanoid and GC-MS analysis of the essential oil of Mexican verbenas

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
MI Aguilar ◽  
BE Rivero-Cruz ◽  
AR García ◽  
GR Lara-Issasi
Keyword(s):  
Essential Oil ◽  
Hplc Determination ◽  
Ms Analysis

HPLC Determination of the Alkamide Affinin in Fresh and Dry Roots of Heliopsis longipes (Asteraceae) and HS-SPME-GC-MS-TOF Analysis of Volatile Components

2015 ◽  
Vol 9 (6) ◽  
pp. 1807-1813 ◽  
Author(s):  
María Isabel Aguilar ◽  
Nancy E. Castillo ◽  
Cristian Alvarado-López ◽  
Georgina Duarte-Lisci ◽  
Ramiro Ríos-Gómez ◽  
...  
Keyword(s):  
Hplc Determination ◽  
Volatile Components

Simultaneous HPLC determination of four key metabolites in the metabolic pathway for production of 1,3-propanediol from glycerol

2007 ◽  
Vol 65 (9-10) ◽  
pp. 629-632
Author(s):  
H CHEN ◽  
B FANG ◽  
Z HU
Keyword(s):  
Metabolic Pathway ◽  
Hplc Determination

Development of a New Method for Determination of the Oil Content from Microalgae Lipid Fraction

2017 ◽  
Vol 68 (4) ◽  
pp. 671-674
Author(s):  
Ana Maria Galan ◽  
Ioan Calinescu ◽  
Elena Radu ◽  
Elena Emilia Oprescu ◽  
Gabriel Vasilievici ◽  
...  
Keyword(s):  
Sunflower Oil ◽  
Oil Content ◽  
Lipid Fraction ◽  
New Method ◽  
Ms Analysis ◽  
Qualitative Determination ◽  
Tga Analysis

The purpose of this study was to develop a method for rapid quantitative and qualitative determination of the oil from microalgae lipid fraction obtained from Nannochloris sp biomass. The lipid fraction was first refluxed with 4% KOH in MeOH (60, 90, 120 min), followed by reaction with 20% BF3 in MeOH, using different times of reflux (90,120, 150 min) for each time of reflux with 4% KOH in MeOH. The FAME samples were analyzed by GC-MS analysis. 120 min reflux with 4% KOH in MeOH, 90 min with 20% BF3 in MeOH and a ratio lipid fraction: 4% KOH in MeOH: 20% BF3 in MeOH=1:20:27, were required to obtain the higher percent of oil in the microalgae lipid fraction. The relevance of the method developed was proved by TGA analysis and by transesterification of a sunflower oil sample in the same conditions.

Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

2020 ◽  
Vol 70 (12) ◽  
pp. 4594-4600
Keyword(s):  
Thermogravimetric Analysis ◽  
Food Industry ◽  
Wood Waste ◽  
Biomass Ash ◽  
Minor Elements ◽  
Ms Analysis ◽  
Icp Ms ◽  
Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

Innovative Method for Ultratrace Determination of Formaldehyde in Frozen Fish: SPME Extraction and GC-ITMS/MS Analysis

2005 ◽  
Vol 1 (2) ◽  
pp. 129-134 ◽  
Author(s):  
F. Bianchi ◽  
M. Careri ◽  
C. Corradini ◽  
M. Musci ◽  
A. Mangia
Keyword(s):  
Innovative Method ◽  
Ms Analysis ◽  
Frozen Fish

scholarly journals Determination of the Effect of Co-cultivation on the Production and Root Exudation of Flavonoids in Four Legume Species Using LC–MS/MS Analysis

2021 ◽  
Author(s):  
Federico Leoni ◽  
Hossein Hazrati ◽  
Inge S. Fomsgaard ◽  
Anna-Camilla Moonen ◽  
Per Kudsk
Keyword(s):  
Root Exudation ◽  
Legume Species ◽  
Ms Analysis

scholarly journals Quantitative Determination of the Surface Distribution of Supported Metal Nanoparticles: A Laser Ablation–ICP–MS Based Approach

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 77
Author(s):  
Davide Spanu ◽  
Gilberto Binda ◽  
Marcello Marelli ◽  
Laura Rampazzi ◽  
Sandro Recchia ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Ablation ◽  
Quantitative Determination ◽  
Metal Nanoparticles ◽  
Total Mass ◽  
Functional Materials ◽  
Metal Extraction ◽  
Ms Analysis ◽  
Icp Ms

A laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) based method is proposed for the quantitative determination of the spatial distribution of metal nanoparticles (NPs) supported on planar substrates. The surface is sampled using tailored ablation patterns and the data are used to define three-dimensional functions describing the spatial distribution of NPs. The volume integrals of such interpolated surfaces are calibrated to obtain the mass distribution of Ag NPs by correlation with the total mass of metal as determined by metal extraction and ICP–MS analysis. Once this mass calibration is carried out on a sacrificial sample, quantifications can be performed over multiple samples by a simple micro-destructive LA–ICP–MS analysis without requiring the extraction/dissolution of metal NPs. The proposed approach is here tested using a model sample consisting of a low-density polyethylene (LDPE) disk decorated with silver NPs, achieving high spatial resolution over cm2-sized samples and very high sensitivity. The developed method is accordingly a useful analytical tool for applications requiring both the total mass and the spatial distribution of metal NPs to be determined without damaging the sample surface (e.g., composite functional materials and NPs, decorated catalysts or electrodic materials).

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