Effect of Heating Rate on Steam Gasification of Biomass. 2. Thermogravimetric-Mass Spectrometric (TG-MS) Analysis of Gas Evolution

2003 ◽  
Vol 42 (17) ◽  
pp. 3929-3936 ◽  
Author(s):  
Chihiro Fushimi ◽  
Kenichi Araki ◽  
Yohsuke Yamaguchi ◽  
Atsushi Tsutsumi
Keyword(s):  
Heating Rate ◽  
Mass Spectrometric ◽  
Steam Gasification ◽  
Gas Evolution ◽  
Ms Analysis

Gas Chromatographic/Mass Spectrometric Confirmation of Leucomalachite Green in Catfish (Ictalurus punctatus) Tissue

1995 ◽  
Vol 78 (4) ◽  
pp. 971-977 ◽  
Author(s):  
Sherri B Turnipseed ◽  
José E Roybal ◽  
Jeffrey A Hurlbut ◽  
Austin R Long
Keyword(s):  
Solid Phase Extraction ◽  
Ictalurus Punctatus ◽  
Solid Phase ◽  
Mass Spectrometric ◽  
Phase Extraction ◽  
Neutral Alumina ◽  
Ms Analysis ◽  
Solid Phase Extraction Cartridge ◽  
Leucomalachite Green ◽  
Chromatographic Mass

Abstract A gas chromatographic/mass spectrometric (GC/MS) method was developed to confirm the presence of leucomalachite green (LMG), a metabolite of the triphenylmethane dye malachite green (MG), in catfish tissue. Residues were isolated according to a previously described liquid chromatographic (LC)A/IS spectrometric analysis of MG and LMG in fish. In our isolation procedure, analytes are extracted from tissue with acetonitrile–buffer, partitioned into CH2CI2, and applied to neutral alumina and propylsulfonic acid solid-phase extraction cartridges. Before GC/MS analysis, extracts prepared for the LC determinative method are eluted from a cyano solid-phase extraction cartridge, extracted into organic solvent, and concentrated for GC/MS analysis. Selected ion monitoring was performed by using 5 diagnostic ions (m/z 330,329,253,210, and 165) of LMG. The method was validated by confirming LMG in tissue fortified with mixtures of MG and LMG (5 and 10 ng/g each) and in tissue from fish that had been exposed to low levels of MG.

scholarly journals Py–FTIR–GC/MS Analysis of Volatile Products of Automobile Shredder Residue Pyrolysis

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2734
Author(s):  
Bin Yang ◽  
Ming Chen
Keyword(s):  
Alternative Energy ◽  
Oil And Gas ◽  
Gaseous Product ◽  
Steam Gasification ◽  
Pyrolysis Oil ◽  
Shredder Residue ◽  
Gaseous Products ◽  
Automobile Shredder Residue ◽  
Ms Analysis ◽  
Volatile Products

Automobile shredder residue (ASR) pyrolysis produces solid, liquid, and gaseous products, particularly pyrolysis oil and gas, which could be used as renewable alternative energy resources. Due to the primary pyrolysis reaction not being complete, the yield of gaseous product is low. The pyrolysis tar comprises chemically unstable volatiles before condensing into liquid. Understanding the characteristics of volatile products will aid the design and improvement of subsequent processes. In order to accurately analyze the chemical characteristics and yields of volatile products of ASR primary pyrolysis, TG–FTIR–GC/MS analysis technology was used. According to the analysis results of the Gram–Schmidt profiles, the 3D stack plots, and GC/MS chromatograms of MixASR, ASR, and its main components, the major pyrolytic products of ASR included alkanes, olefins, and alcohols, and both had dense and indistinguishable weak peaks in the wavenumber range of 1900–1400 cm−1. Many of these products have unstable or weaker chemical bonds, such as =CH–, =CH2, –C=C–, and –C=CH2. Hence, more syngas with higher heating values can be obtained with further catalytic pyrolysis gasification, steam gasification, or higher temperature pyrolysis.

Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometric (GC-MS) analysis of volatile profiles during the stir-frying process of malt

2016 ◽  
Vol 8 (7) ◽  
pp. 1699-1704 ◽  
Author(s):  
Yao Xu ◽  
Xia Zhou ◽  
Dayong Zhang ◽  
Zelun Lan ◽  
Yun Zhang ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Mass Spectrometric ◽  
Volatile Profile ◽  
Headspace Solid Phase Microextraction ◽  
Frying Process ◽  
Ms Analysis ◽  
Volatile Profiles ◽  
The Relationship

The purpose of this study was to analyze the relationship between volatile profile variations of malt and its stir-fried forms, so as to sum up odor changes in the stir-frying process.

Detection of Nutmeg Abuse by Gas Chromatography—Mass Spectrometric Screening of Urine

2019 ◽  
Author(s):  
Merja A Neukamm ◽  
Hannes M Schwelm ◽  
Simon Vieser ◽  
Nadine Schiesel ◽  
Volker Auwärter
Keyword(s):  
Evaluation Model ◽  
Internal Standard ◽  
Black Pepper ◽  
Mass Spectrometric ◽  
Urine Samples ◽  
Low Doses ◽  
Creatinine Concentration ◽  
Ms Analysis ◽  
High Doses ◽  
Analysis Of Urine

Abstract High doses of nutmeg (seeds from Myristica fragrans Houtt.) can be abused as a psychoactive drug due to phenylpropene ingredients. During controlled abstinence, e.g., in forensic psychiatric clinics, nutmeg abuse has to be distinguished from an ingestion of other spices having phenylpropene ingredients (e.g., black pepper or garden lovage) or unintentional low-dose nutmeg intake. The aim of this study was to develop an evaluation model for the estimation of time point and amount of nutmeg abuse and differentiation from ingestion of other spices or low doses of nutmeg based on the gas chromatographic–mass spectrometric (GC–MS) analysis of urine samples. A total of 3 volunteers ingested 1.5 g of freshly ground nutmeg. No symptoms were reported. Urine samples were collected for up to 3 days. In addition, 18 blank samples from volunteers with regular diet and 2 authentic samples from forensic psychiatry patients with supposed nutmeg abuse were analyzed. All samples were analyzed by GC–MS in full scan mode. Metabolites of the nutmeg ingredients safrole, myristicin and elemicin were identified via a library search. For semi-quantitative estimations, the area ratios of the analytes to the internal standard (MDMA-d5) were normalized to the creatinine concentration. Up to 8 different metabolites were detected for at least 18 hours after intake of 1.5 g of nutmeg. In the two authentic samples, the normalized area ratios of those metabolites were 0.5–14 times the maximum reached in the intake study. Two additional metabolites could be detected in authentic samples. Probably due to ingestion of other spices, 5 of the 8 metabolites after intake of 1.5 g of nutmeg were detected in blank urine samples as well. The intake of high doses of nutmeg can be differentiated from the ingestion of other spices or low doses of nutmeg via standard GC–MS analysis of urine and application of the proposed evaluation model.

scholarly journals Effects of Heating Rate and Coal Type on Gas Evolution during Coal Pyrolysis

1996 ◽  
Vol 82 (5) ◽  
pp. 388-392 ◽  
Author(s):  
Takayuki TAKARADA ◽  
Nobuyoshi GOTO ◽  
Kayoko MORISHITA ◽  
Koji HAYASHI ◽  
Hidehiro KATAHIRA ◽  
...  
Keyword(s):  
Heating Rate ◽  
Gas Evolution ◽  
Coal Pyrolysis ◽  
Coal Type
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