Temperature rise time and true pyrolysis temperature in pulse mode pyrolysis gas chromatography

1972 ◽  
Vol 44 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Ram L. Levy ◽  
Dale L. Fanter ◽  
Clarence J. Wolf
Keyword(s):  
Gas Chromatography ◽  
Temperature Rise ◽  
Rise Time ◽  
Pyrolysis Temperature ◽  
Pulse Mode ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography

scholarly journals Bioaccumulation study of acrylates in algae (Chlorella kessleri) by Py-GC and Py-GC/MS

2005 ◽  
Vol 3 (3) ◽  
pp. 570-582 ◽  
Author(s):  
Ladislav Halás ◽  
Andrej Oriňák ◽  
Abubaker Sharif ◽  
Monika Ádámová ◽  
Juraj Ladomerský
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pyrolysis Temperature ◽  
Aquatic Organism ◽  
Pyrolysis Gas ◽  
Chlorella Kessleri ◽  
Pyrolysis Gas Chromatography ◽  
Acrylate Monomers ◽  
Maximum Content

AbstractAcrylate monomers methylmethacrylate (MMA) and cyclohexylmethacrylate (CHMA) bioaccumulation has been determined in aquatic organism, algae (Chlorella kessleri). Algae were collected in amount of 0.4 mg and directly injected to the pyrolytical cell. In algae bodies accumulated monomers were analysed by pyrolysis gas chromatography (Py-GC) and pyrolysis gas chromatography coupled with mass spectrometry (Py-GC/MS). Traces of the accumulated monomers in algae body can be determined after 1-, 2-, 3-weeks of incubation. Maximum content of MMA was determined after 3-week of experiment, contrariwise in the case of CHMA after 2-week exposition. Relationship with pyrolysis temperature has also been studied.

Pyrolysis Gas Chromatography of Natural Rubber and Synthetic Polyisoprene

1968 ◽  
Vol 41 (2) ◽  
pp. 411-417 ◽  
Author(s):  
M. Jernejčič ◽  
L. Premru
Keyword(s):  
Gas Chromatography ◽  
Natural Rubber ◽  
Pyrolysis Temperature ◽  
Volatile Components ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Temperature Range

Abstract Pyrolysis gas Chromatographic isothermal and temperature programed separation of volatile components of unvulcanized natural rubber and synthetic polyisoprene was made on P-E columns Q and U. Besides identifications, relative quantitative differences between pyrolysis degradations of natural rubber and synthetic polyisoprene in pyrolysis temperature range 550°–750° C were established. It was found that the method was not suitable for an analogous study of vulcanized samples.

Study on Pyrolysis Behavior of Polybenzoxazine by PyGC-MS

2015 ◽  
Vol 1088 ◽  
pp. 318-321
Author(s):  
Dan Li Lin
Keyword(s):  
Gas Chromatography ◽  
Pyrolysis Temperature ◽  
Pyrolysis Gas ◽  
Pyrolysis Mechanism ◽  
Pyrolysis Gas Chromatography ◽  
Pyrolysis Behavior ◽  
Degradation Reactions ◽  
Different Temperatures ◽  
Gas Chromatography Mass Spectroscopy ◽  
Aldehyde Groups

Pyrolysis behavior of a new kind of polybenzoxazine with aldehyde groups was investigated by pyrolysis gas chromatography-mass spectroscopy (PyGC-MS) at the temperatures ranging from 450°C to 750°C. It was found from the pyrolysis chromatograms that the type and amount of its pyrolysates obviously change with pyrolysis temperature due to various pyrolysis behaviors at different temperatures. From the structures and relative contents of the pyrolysates, the pyrolysis mechanism of the polybenzoxazine was described as follows: the initial degradation reactions occurred mainly at the Cmethylene-N bond, followed by the Cphenyl-C methylene bonds.

CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Markus Heryanto Langsa
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pinus Radiate

<p>Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (<em>wandoo eucalyptus </em>and <em>pinus radiate, conifer</em>) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).</p><p>Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV<sub>254</sub> disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.</p>

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