scholarly journals A Comparison of the Composition of Selected Commercial Sandalwood Oils with the International Standard

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2249
Author(s):  
Malgorzata Kucharska ◽  
Barbara Frydrych ◽  
Wiktor Wesolowski ◽  
Jadwiga A. Szymanska ◽  
Anna Kilanowicz
Keyword(s):  
Mass Spectrometry Analysis ◽  
Santalum Album ◽  
Benzyl Benzoate ◽  
Spectrometry Analysis ◽  
Correct Information ◽  
Three Samples ◽  
Two Samples ◽  
High Street ◽  
Chromatographic Profile ◽  
Sandalwood Oil

Sandalwood oils are highly desired but expensive, and hence many counterfeit oils are sold in high street shops. The study aimed to determine the content of oils sold under the name sandalwood oil and then compare their chromatographic profile and α- and β santalol content with the requirements of ISO 3518:2002. Gas chromatography with mass spectrometry analysis found that none of the six tested “sandalwood” oils met the ISO standard, especially in terms of α-santalol content. Only one sample was found to contain both α- and β-santalol, characteristic of Santalum album. In three samples, valerianol, elemol, eudesmol isomers, and caryophyllene dominated, indicating the presence of Amyris balsamifera oil. Another two oil samples were found to be synthetic mixtures: benzyl benzoate predominating in one, and synthetic alcohols, such as javanol, polysantol and ebanol, in the other. The product label only gave correct information in three cases: one sample containing Santalum album oil and two samples containing Amyris balsamifera oil. The synthetic samples described as 100% natural essential oil from sandalwood are particularly dangerous and misleading to the consumer. Moreover, the toxicological properties of javanol, polysantol and ebanol, for example, are unknown.

scholarly journals Liquid chromatography–mass spectrometry analysis of cationic aniline dyes from the Technical University of Dresden Historical Collection of Dyes

2020 ◽  
Vol 44 (5-6) ◽  
pp. 326-335
Author(s):  
Michael John Plater ◽  
Andrea Raab ◽  
Horst Hartmann
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Complex Mixture ◽  
Mass Spectrometry Analysis ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Left Hand ◽  
Chromatography Mass Spectrometry ◽  
Two Samples ◽  
Aniline Dyes

Liquid chromatography–mass spectrometry has been used to analyse a range of cationic aniline dyes from the 19th century. Mauveine from the Chandler museum is used as a standard for comparison. This consists of a typical W. H. Perkin mixture of mauveine A and B. Mauveine from a historic collection in Dresden is different and consists of mainly mauveine A and a monomethyl mauveine chromophore. Possible synthetic routes and its significance are discussed. Three samples of phenylated rosanilines have been analysed, and a list of 19 possible components compiled. An analysis by liquid chromatography–mass spectrometry works well on this complex mixture giving clear information on retention times and accurate mass molecular weights. Mono-, di- and triphenylrosanilines are present in two samples, and a third sample has mainly monophenylrosaniline. In each sample, a small amount of higher molecular weight homologues appear. The thin-layer chromatography plate, from left to right, has fuchsin or rosaniline then mono-, di- and triphenylrosaniline. The two spots on the right-hand side are blue, and the two spots on the left-hand side are red.

Evaluation of Secondary Cathodes for Glow Discharge Mass Spectrometry Analysis of Different Nonconducting Sample Types

1995 ◽  
Vol 49 (7) ◽  
pp. 939-944 ◽  
Author(s):  
Wim Schelles ◽  
Stefan De Gendt ◽  
Victor Muller ◽  
René Van Grieken
Keyword(s):  
Mass Spectrometry ◽  
Glow Discharge ◽  
Iron Ore ◽  
Glow Discharge Mass Spectrometry ◽  
Mass Spectrometry Analysis ◽  
Electrical Characteristics ◽  
Spectrometry Analysis ◽  
Iron Ore Sinter ◽  
Two Samples ◽  
Solid Glass

The use of different secondary cathodes is evaluated for the analysis of solid, nonconducting samples by means of dc glow discharge mass spectrometry. Optimum discharge conditions and analytical characteristics are reported for the analysis of a compacted iron ore sinter and a solid glass sample, both with known composition. These conditions seem to differ significantly for the two samples under consideration. This difference is assumed to be caused mainly by the electrical characteristics of the sample. The electrical resistivity of the sample is indeed found to be an important factor, determining the capabilities of the technique, especially with respect to the detection power.

scholarly journals Іdentification Of Gasoline In Altered Mixture With Diesel Fuel

2019 ◽  
Vol 14 (2) ◽  
pp. 102-112
Author(s):  
V. Rudniev ◽  
O. Kliuiev ◽  
O. Uhrovetskyi
Keyword(s):  
Gas Chromatography ◽  
Diesel Fuel ◽  
Limit Of Detection ◽  
Polyaromatic Hydrocarbons ◽  
Methodological Approach ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatographic Profile ◽  
Pyrene Derivatives

The methodological approach to identification of gasoline with an admixture of diesel fuel was presented. The approach involves using of gas chromatography–mass-spectrometry analysis of altered mixture. An algorithm of gas chromatography profile treatment includes analysis of extracted ion chromatogram for searching of polyaromatic hydrocarbons with 2 to 4 aromatic ring, mostly naphthalene, anthracene, phenanthrene and pyrene derivatives. The complex of specified components can be used as indicator of gasoline presence in mixture in the case if its chromatographic profile by total ion chromatogram is typical for diesel fuel. Obtained results show in common high similarity of chromatographic profile of altered diesel fuel and gasoline with small admixture (0.25 vol.%) of diesel fuel. A wrong identification results may be obtained without taking into account presence of pointed polyaromatic hydrocarbons. Such complex cannot be found entirely in pure diesel fuel in initial or altered state because its components are below or about of limit of detection. Determined limit of detection for polyaromatic hydrocarbons (naphthalene, phenanthrene, anthracene, pyrene) is 1.8-2.2 μg/ml.

scholarly journals Rapid Evaluation of Spermidine from 12 Bean Cultivars by Direct Real-Time Mass Spectrometry Analysis

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2138
Author(s):  
Tao Wu ◽  
Xiaoyu Wu ◽  
Xv Yuan ◽  
Yi Wang ◽  
Wenhua Zhou ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Real Time ◽  
Chromatographic Separation ◽  
Extraction Procedure ◽  
Direct Analysis ◽  
Mass Spectrometry Analysis ◽  
Spectrometry Analysis ◽  
Three Samples ◽  
Sample Extraction ◽  
Ionization Mode

The routine spermidine (SPD) detection method is time-consuming and laborious due to the lengthy chromatographic separation and/or tedious sample derivatization pretreatment. In this study, direct analysis in real-time ionization mode coupled with mass spectrometry (DART-MS) was developed to rapidly determine the SPD content of 12 bean cultivars. The results were compared in detail with those of the classical UHPLC-ESI-QTOF method. After conducting a series of optimizations, a simple sample extraction procedure employing 80% aqueous methanol, was followed by determination of sample extracts directly without any chromatographic separation or prior derivatization. The validated method showed excellent performance with low limits of detection (LOD of 0.025 mg·kg−1) and good recovery rates (102.79–148.44%). The investigation highlighted that the DART-MS method (~1.3 min per three samples) could be used as a high-throughput alternative to the classic UHPLC-ESI-QTOF method (~15 min per three samples).

scholarly journals Chemometric analysis of volatiles of propolis from different regions using static headspace GC-MS

2014 ◽  
Vol 12 (6) ◽  
pp. 736-746 ◽  
Author(s):  
Vilma Kaškonienė ◽  
Paulius Kaškonas ◽  
Audrius Maruška ◽  
Loreta Kubilienė
Keyword(s):  
Principal Component ◽  
Hierarchical Cluster ◽  
Statistical Investigation ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Static Headspace ◽  
Spectrometry Analysis ◽  
Three Samples ◽  
Brazilian Propolis ◽  
Processing Techniques

AbstractSix samples of propolis were analyzed in the paper: a sample from Brazil, Estonia, China and three samples from different locations of Uruguay. Static headspace technique coupled with gas chromatography-mass spectrometry analysis has been applied for the determination of the characteristic volatile profile with the aim to differentiate the propolis from different regions. Monoterpenes (α- and β-pinenes) were predominant in all samples, except the sample from China. This sample separated itself by the alcohols 3-methyl-3-buten-1-ol and 3-methyl-2-buten-1-ol, (40.33% and 11.57%, respectively) and ester 4-penten-1-yl acetate (9.04%). α-Pinene and β-pinene composed 64.59–77.56% of volatiles in Brazilian and Uruguayan propolis, and 29.43% in Estonian propolis. Brazilian propolis was distinguished by a high amount of β-methyl crotonaldehyde (10.11%), one of Uruguayan samples 3- by limonene (15.58%), and the Estonian sample — by eucalyptol (25.95%). Statistical investigation of the samples was made applying principal component, hierarchical cluster and K-Means cluster analyses. Various data pre-processing techniques were proposed and used to study and obtain the important volatile compounds contributed to the differentiation of the propolis samples from different regions to separate clusters.

scholarly journals An Improved LC–MS/MS Method for the Analysis of Thirteen Cytostatics on Workplace Surfaces

2021 ◽  
Vol 14 (8) ◽  
pp. 754
Author(s):  
Maria Francisca Portilha-Cunha ◽  
Sara Ramos ◽  
Adrián M. T. Silva ◽  
Pedro Norton ◽  
Arminda Alves ◽  
...  
Keyword(s):  
Sampling Technique ◽  
Dermal Absorption ◽  
University Hospital ◽  
Mass Spectrometry Analysis ◽  
Spectrometry Analysis ◽  
Wipe Sampling ◽  
Three Samples ◽  
Liquid Chromatography Tandem Mass ◽  
Simple Extraction ◽  
Global Uncertainty

Cytostatics are drugs used in cancer treatment, which pose serious risks to healthcare workers. Dermal absorption via surface contamination is the key exposure route; thus, rapid, reliable, and validated analytical methods for multicomponent detection are crucial to identify the exposure risk. A surface-wipe-sampling technique compatible with hospitals’ safety requirements (gauze, 1 mL isopropanol) and a fast and simple extraction method (1 mL acetonitrile, 20 min ultrasonic bath, evaporation, reconstitution in 200 µL acetonitrile), coupled with liquid chromatography–tandem mass spectrometry analysis, were developed. It allowed identification and quantification of 13 cytostatics on surfaces: cyclophosphamide, doxorubicin, etoposide, ifosfamide, paclitaxel, bicalutamide, capecitabine, cyproterone, flutamide, imatinib, megestrol, mycophenolate mofetil, prednisone. Good linearity, sensitivity, and precision were achieved (R2 > 0.997, IDLs < 4.0 pg/cm2, average CV 16%, respectively). Accuracy for four model surfaces (melamine-coated wood, phenolic compact, steel 304, steel 316) was acceptable (80 ± 12%), except for capecitabine and doxorubicin. Global uncertainty is below 35% for concentrations above 100 pg/cm2 (except for capecitabine and doxorubicin)—a guidance value for relevant contamination. Method application in a Portuguese university hospital (28 samples) identified the presence of seven cytostatics, at concentrations below 100 pg/cm2, except for three samples. The widespread presence of cyclophosphamide evinces the necessity to review implemented procedures.

Spectrophotometry Measurement of Polynuclear Aromatic Hydrocarbons in Hamilton Harbour Sediments

1991 ◽  
Vol 26 (1) ◽  
pp. 1-16 ◽  
Author(s):  
T.P. Murphy ◽  
H. Brouwer ◽  
M.E. Fox ◽  
E. Nagy
Keyword(s):  
Aromatic Hydrocarbons ◽  
Total Concentration ◽  
Coal Tar ◽  
Sediment Cores ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Near Surface ◽  
Spectrometry Analysis ◽  
Hamilton Harbour

Abstract Eighty-one sediment cores were collected to determine the extent of coal tar contamination in a toxic area of Hamilton Harbour. Over 800 samples were analyzed by a UV spectrophotometric technique that was standardized with gas chromatography/mass spectrometry analysis. The coal tar distribution was variable. The highest concentrations were near the Stelco outfalls and the Hamilton-Wentworth combined sewer outfalls. The total concentration of the 16 polynuclear aromatic hydrocarbons (PAHs) in 48,300 m3 of near-surface sediments exceeded 200 µg/g.

Sign in / Sign up

Export Citation Format

Share Document