scholarly journals Chemical Feedstock Recovery via the Pyrolysis of Electronically Heated Tobacco Wastes

2021 ◽  
Vol 13 (22) ◽  
pp. 12856
Author(s):  
Yejin Choi ◽  
Sangjae Jeong ◽  
Young-Kwon Park ◽  
Huijeong Kim ◽  
Se-Jeong Lim ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Cellulose Acetate ◽  
Gas Chromatography Mass Spectrometry ◽  
Poly Lactic Acid ◽  
Tobacco Leaves ◽  
Ms Analysis ◽  
Apparent Activation Energies

The pyrolysis of waste electronically heated tobacco (EHT), consisting of tobacco leaves (TL), a poly-lactic acid (PLA) filter, and a cellulose acetate (CA) filter, was investigated using thermogravimetric (TG) and pyrolyzer–gas chromatography/mass spectrometry (Py-GC/MS) analysis. The pyrolytic properties of waste EHT obtained after smoking were comparable to those of fresh EHT. Although the maximum decomposition temperatures (TmaxS) of waste TL and CA were similar to those of fresh EHT components, the Tmax of waste PLA was slightly higher than that of fresh PLA due to smoldering. The Tmaxs of PLA and CA were lowered when they were co-pyrolyzed with TL due to interactions between pyrolysis intermediates. The apparent activation energies for the non-isothermal pyrolysis of waste EHT components were higher than those of fresh EHT components. Py-GC/MS analysis results indicated that considerable amounts of chemical feedstocks, such as nicotine and limonene from TL, caprolactone and lactide from PLA, and acetic acid and triacetin from CA, can be recovered by simple pyrolysis of EHT. Co-pyrolysis of TL, PLA, and CA revealed that the experimental amount of lactide was much larger than the calculated value, suggesting its synergistic formation.

Novel Applications for Biomaterials: The Case of Remediation of Wine Taints Using Poly-Lactic Acid Polymer

2015 ◽  
Vol 749 ◽  
pp. 70-73 ◽  
Author(s):  
Andreea Botezatu ◽  
Gary James Pickering
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Lactic Acid ◽  
Solid Phase ◽  
Alcoholic Beverage ◽  
Film Surface ◽  
Gas Chromatography Mass Spectrometry ◽  
Poly Lactic Acid ◽  
Chromatography Mass Spectrometry ◽  
Before And After

Wine is the world’s oldest alcoholic beverage and the most consumed in at least 20 countries. However, taints detract from its quality and acceptance, significantly reducing the value of wine. In this study we investigated the capacity of a poly-lactic acid (PLA) biopolymer to reduce concentrations of four odorants responsible for tainting many red wines: isopropyl-methoxypyrazine (IPMP), isobutyl–methoxypyrazine (IBMP), 4-ethylphenol (4-EP) and 4-ethylguaiacol (4-EG). Red wine was spiked with either IPMP [20 ng/L] and IBMP [20 ng/L] (Study 1) or 4-EP [200 ug/L] and 4-EG [200 ug/L] (Study 2) and then treated with a PLA film [surface area 350 cm2/L]. Solid Phase Micro-Extraction Multi-Dimensional Gas Chromatography–Mass Spectrometry and Gas Chromatography-Mass Spectrometry were used to measure the methoxypyrazines and ethylphenols, respectively, both before and after treatment with PLA. Results showed significant reductions in all of the target odorants after 8hrs treatment: IPMP (51%), IBMP (26%), 4-EP (21%) and 4-EG (20%). Taken overall, the data suggest potential for the use of PLA in treating common wine faults, particularly ‘ladybug taint’, which is caused by elevated levels of IPMP.

scholarly journals The Analysis of Bayer Liquor by SPME-GC-MS of Derivatized Organic Poisons

Proceedings ◽  
2021 ◽  
Vol 57 (1) ◽  
pp. 101
Author(s):  
Virgil Badescu ◽  
Raluca Senin
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Bayer Liquor ◽  
Chromatography Mass Spectrometry ◽  
Ms Analysis ◽  
Silylating Agent

The aim of this article was the gas chromatography–mass spectrometry (GC-MS) analysis oforganic matter from a residual liquor sample (S.C. Alum S.A., Tulcea), extracted by the solid-phasemicroextraction method (SPMA) and derivatized with N-(tert-butyldimethylsilyl)-Nmethyltrifluoroacetamide(MTBSTFA) as the silylating agent. [...]

scholarly journals Development and validation of the method for the detection of glimepiride via derivatization employing N-methyl-N-(trimethylsilyl) trifluoroacetamide using gas chromatography-mass spectrometry

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Priyanka Verma ◽  
Atul Bajaj ◽  
R. M. Tripathi ◽  
Sudhir K. Shukla ◽  
Suman Nagpal
Keyword(s):  
Diabetes Mellitus ◽  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Drug Users ◽  
Coefficient Of Determination ◽  
Gas Chromatography Mass Spectrometry ◽  
Biological Matrices ◽  
Chromatography Mass Spectrometry ◽  
Ms Analysis ◽  
The Stability

Abstract Background Recent advances in the diversified anti-diabetic drugs have appeared in the startling increase in the count of poisoning cases. The epidemics of diabetes mellitus are increasing; hence, the no. of anti-diabetic drug users raised by 42.9%. The use of glimepiride raised to 24%. As the toxicity and drug cases are also escalating with increasing epidemics of diabetes mellitus, a novel gas chromatography-mass spectrometry (GC-MS) method for detecting glimepiride in biological matrices is developed. Results Liquid-liquid extraction method was employed by using 1-butanol: hexane (50:50, v/v) under an alkaline medium, and then back extraction was done via acetic acid. Distinct derivatization techniques were employed for the sample preparation for GC-MS analysis, i.e., silylation and acylation. Derivatization approaches were optimized under different parameters, i.e., reaction temperature and reaction time. N-Methyl-N-(trimethylsilyl) trifluoroacetamide [MSTFA] was found to be the best sound derivatization reagent for the GC-MS analysis of glimepiride. Total ion current (TIC) mode was selected for the monitoring of ions of trimethylsilyl (TMS) derivative of glimepiride with an m/z ratio of 256. Distinct parameters like specificity, carryover, stability, precision, and accuracy were evaluated for validating the identification method. The GC-MS method is found to be linear and illustrated within the range 500 to 2500 ng/ml with the value of R2 (coefficient of determination) at 0.9924. The stability of the extracted and derivatized glimepiride was accessed with regard to processed/extracted sample conditions and autosampler conditions, respectively. Accuracy at each concentration level was within the + 15% of the nominal concentration. Precision (%) for the interday and intraday analysis was found to be in the respectable spectrum. Conclusion Henceforth, the proposed GC-MS method can be employed for the determination of glimepiride in biological matrices.

scholarly journals PHYTOCHEMICAL EVALUATION OF TILIACORA RACEMOSA COLEBR. USING GAS CHROMATOGRAPHY - MASS SPECTROMETRY (GC-MS)

2018 ◽  
Vol 11 (2) ◽  
pp. 350
Author(s):  
Yogeshwari C ◽  
Kumudha P
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Bioactive Compounds ◽  
Quinic Acid ◽  
Physicochemical Analysis ◽  
Drug Formulation ◽  
Gas Chromatography Mass Spectrometry ◽  
Isolation And Characterization ◽  
Chromatography Mass Spectrometry ◽  
Ms Analysis

 Objective:The objective of this study is to characterize the phytoconstituents of Tiliacora racemosa Colebr. using gas chromatography mass spectrometry (GC-MS).Methods: Preliminary phytochemical and physicochemical analysis was carried out using standard procedures. GC-MS analysis of methanolic extract was carried out using Thermo GC-Trace Ultra version: 5.0, Thermo MS DSQ with a DB 35MS capillary standard non-polar column and gas chromatograph interfaced to a mass selective detector (MS DSQ II) with Xcalibur software.Results: Preliminary phytochemical screening revealed the presence of alkaloids, flavonoids, phenols, tannins, triterpenoids, steroids, proteins and amino acids, carbohydrates, saponins and coumarin. Quinones, anthraquinones, glycosides and fixed oil were absent. GC-MS analysis revealed the presence of 28 compounds of which quinic acid (retention times [RT]: 15.65) and inositol, 1-deoxy-(CAS) (RT: 19.24) was observed as abundant compounds.Conclusion: The presence of various bioactive compounds confirms the medicinal importance and it’s application for curing various diseases by traditional practitioners. However, isolation and characterization of potential bioactive compounds would lead to drug formulation.

scholarly journals GAS CHROMATOGRAPHY-MASS SPECTROMETRY ANALYSIS OF AN ENDANGERED MEDICINAL PLANT, SARCOSTEMMA VIMINALE (L.) R.BR. FROM THAR DESERT, RAJASTHAN (INDIA)

2017 ◽  
Vol 10 (9) ◽  
pp. 210 ◽  
Author(s):  
Arora Sunita ◽  
Meena Sonam ◽  
Kumar Ganesh
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Acetic Acid ◽  
Medicinal Plants ◽  
Maximum Amount ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
World Population ◽  
Thar Desert ◽  
Chromatography Mass Spectrometry

  Objective: Sarcostemma viminale (L.) R. Br. is one of the important endangered medicinal plants belonging to the family Asclepiadaceae. The aim of the present investigation was to determine the possible bioactive phytochemicals from stem of S. viminale (L.) R. Br. using methanol, chloroform, and hexane as solvents.Methods: Plant material was collected from typical conditions of Indian Thar Desert in the month of July-September, 2016. This plant always grows in association with the congeneric plant, Euphorbia caducifolia. The phytochemical compounds were investigated using Perkin-Elmer gas chromatography-mass spectrometry, while the mass spectra of the compounds found in the extract were matched with the National Institute of Standards and Technology library.Results: Maximum % area is found for Lup-20-(29)-en-3-yl acetate is present maximum amount (40.85%) with reaction time (RT)=43.787 minutes, followed by 4, 4, 6A, 6B, 8A, 11, 11, 14B-octamethyl-1, 4, 4A, 5, 6, 6A, 6B, 7, 8, 8A, 9, 10, 11, 12, 12A, 14, 14A, 14B-octadecahydro-2H-picen-3- one$$olean-12-en-3-one# (13.74%) with RT=44.420 minutes in the methanolic extract; acetic acid 4, 4, 6A, 8A, 11, 12, 14B-octamethyl-1, 2, 3, 4, 4A, 5, 6, 6A, 6B, 7, 8, 8A, 9, 10, 11, 12, 12A, 14, 14A, 14B-eicosahydro-picen-3-yl ester $$ urs-12-en-3-yl acetate is present maximum amount (44.98%) with RT=48.265 minutes, followed by. beta.-amyrin (18.51%) with RT=40.580 minutes in the chloroform extract; acetic acid 4, 4, 6A, 8A, 11, 12, 14B-octamethyl-1, 2, 3, 4, 4A, 5, 6, 6A, 6B, 7, 8, 8A, 9, 10, 11, 12, 12A, 14, 14A, 14B-eicosahydro-picen-3-yl ester $$ urs-12-en-3-yl acetate is present maximum amount (45.47%) with RT=48.514 minutes, followed by. beta.-amyrin (19.21%) with RT=40.555 minutes in the hexane extract of stem of S. viminale (L.) R. Br.Conclusion: Medicinal plants contain one or more substances that can be used for therapeutic purpose; they are used by the world population for their basic health needs. The importance of the study is to investigate the pinpoint biological activity of some of these compounds so that they can be used by pharma or some other drug designing industry to find a novel drug.

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