Identification of Chemical Markers for Microorganisms by Pyrolysis GC-MS.

1996 ◽  
Author(s):  
Stephen L. Morgan
Keyword(s):  
Chemical Markers

Isolation of Chemical Markers from Leaves of Acacia rigidula

Planta Medica ◽  
2011 ◽  
Vol 77 (05) ◽  
Author(s):  
RS Pawar ◽  
E Grundel ◽  
S Lorenz ◽  
E Mazzola ◽  
M Eason ◽  
...  
Keyword(s):  
Chemical Markers ◽  
Acacia Rigidula

Cyanogenic Derivatives as Chemical Markers for the Authentication of Commercial Products of Bamboo Shoots

2021 ◽  
Vol 69 (34) ◽  
pp. 9915-9923
Author(s):  
Guillermo F. Padilla-González ◽  
Nicholas J. Sadgrove ◽  
Abigail Rosselli ◽  
Moses K. Langat ◽  
Rui Fang ◽  
...  
Keyword(s):  
Chemical Markers ◽  
Commercial Products ◽  
Bamboo Shoots

scholarly journals Authentication and Traceability Study on Barbera d’Asti and Nizza DOCG Wines: The Role of Trace- and Ultra-Trace Elements

Beverages ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 63
Author(s):  
Maurizio Aceto ◽  
Federica Gulino ◽  
Elisa Calà ◽  
Elisa Robotti ◽  
Maurizio Petrozziello ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Multivariate Data Analysis ◽  
Market Value ◽  
Elemental Distribution ◽  
Average Price ◽  
Chemical Markers ◽  
Grape Variety ◽  
Inductively Coupled ◽  
Ultra Trace

Barbera d’Asti—including Barbera d’Asti superiore—and Nizza are two DOCG (Denominazione di Origine Controllata e Garantita) wines produced in Piemonte (Italy) from the Barbera grape variety. Differences among them arise in the production specifications in terms of purity, ageing, and zone of production, in particular with concern to Nizza, which follows the most stringent rules, sells at three times the average price, and is considered to have the highest market value. To guarantee producers and consumers, authentication methods must be developed in order to distinguish among the different wines. As the production zones totally overlap, it is important to verify whether the distinction is possible or not according to metals content, or whether chemical markers more linked to winemaking are needed. In this work, Inductively Coupled Plasma (ICP) elemental analysis and multivariate data analysis are used to study the authentication and traceability of samples from the three designations of 2015 vintage. The results show that, as far as elemental distribution in wine is concerned, work in the cellar, rather than geographic provenance, is crucial for the possibility of distinction.

scholarly journals Osmotic induction improves batch marking of larval fish otoliths with enriched stable isotopes

2014 ◽  
Vol 71 (9) ◽  
pp. 2530-2538 ◽  
Author(s):  
Emmanuel de Braux ◽  
Fletcher Warren-Myers ◽  
Tim Dempster ◽  
Per Gunnar Fjelldal ◽  
Tom Hansen ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Salmo Salar ◽  
Larval Fish ◽  
Fish Larvae ◽  
Cost Effective ◽  
Industrial Applications ◽  
Chemical Markers ◽  
Potential Applications ◽  
Recent Method ◽  
Batch Marking

Abstract Otolith marking with enriched stable isotopes via immersion is a recent method of batch marking larval fish for a range of research and industrial applications. However, current immersion times and isotope concentrations required to successfully mark an otolith limit the utility of this technique. Osmotic induction improves incorporation and reduces immersion time for some chemical markers, but its effects on isotope incorporation into otoliths are unknown. Here, we tested the effects of osmotic induction over a range of different isotope concentrations and immersion times on relative mark success and strength for 26Mg:24Mg, 86Sr:88Sr and 137Ba:138Ba on Atlantic salmon (Salmo salar) larvae. 71% and 100% mark success were achieved after 1 h of immersion for 86Sr (75 µg L−1) and 137Ba (30 µg L−1) isotopes, respectively. Compared with conventional immersion, osmotic induction improved overall mark strength for 86Sr and 137Ba isotopes by 26–116%, although this effect was only observed after 12 h of immersion and predominately for 86Sr. The results demonstrate that osmotic induction reduces immersion times and the concentrations of isotope required to achieve successful marks. Osmotically induced isotope labels via larval immersion may prove a rapid and cost-effective way of batch marking fish larvae across a range of potential applications.

scholarly journals Systematic Profiling of the Multicomponents and Authentication of Erzhi Pill by UHPLC/Q-Orbitrap-MS Oriented Rapid Polarity-Switching Data-Dependent Acquisition and Selective Monitoring of the Chemical Markers Deduced from Fingerprint Analysis

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3143 ◽  
Author(s):  
Li Jia ◽  
Lingling Fu ◽  
Xiaoyan Wang ◽  
Wenzhi Yang ◽  
Hongda Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
High Energy ◽  
Composition Analysis ◽  
Chemical Markers ◽  
Polarity Switching ◽  
Selective Ion Monitoring ◽  
Marker Compounds ◽  
Full Scan ◽  
Selective Monitoring ◽  
Orbitrap Ms

The analytical platform UHPLC/Q-Orbitrap-MS offers a solution to quality investigation of TCM with high definiteness. Using Erzhi Pill (EZP) as a case, we developed UHPLC/Q-Orbitrap-MS based approaches to achieve systematic multicomponent identification and rapid authentication. Comprehensive multicomponent characterization of EZP was performed by negative/positive switching data-dependent high-energy collision-induced dissociation-MS2 (HCD-MS2) after 25 min chromatographic separation. By reference compounds comparison, elemental composition analysis, fragmentation pathways interpretation, and retrieval of an in-house library, 366 compounds were separated and detected from EZP, and 96 thereof were structurally characterized. The fingerprints of two component drugs (Ligustri Lucidi Fructus, LLF; Ecliptae Herba, EH) for EZP were analyzed under the same LC-MS condition by full scan in negative mode. In combination with currently available pharmacological reports, eight compounds were deduced as the ‘identity markers’ of EZP. Selective ion monitoring (SIM) of eight marker compounds was conducted to authenticate six batches of EZP samples. Both LLF and EH could be detected from all EZP samples by analyzing the SIM spectra, which could indicate their authenticity. Conclusively, UHPLC/Q-Orbitrap-MS by rapid polarity switching could greatly expand the potency of untargeted profiling with high efficiency, and SIM of multiple chemical markers rendered a practical approach enabling the authentication of TCM formulae.

Gallic acid, sinapic acid and catechin as potential chemical markers of Vitis graft success

2019 ◽  
Vol 246 ◽  
pp. 129-135 ◽  
Author(s):  
Maria Assunção ◽  
Jorge Pinheiro ◽  
Sara Cruz ◽  
João Brazão ◽  
Jorge Queiroz ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Sinapic Acid ◽  
Chemical Markers ◽  
Graft Success
Sign in / Sign up

Export Citation Format

Share Document