scholarly journals Simultaneous Organic and Inorganic Analysis of Colored Oriental Lacquerware by Pyrolysis-Gas Chromatography/Mass Spectrometry

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Yoshimi Kamiya ◽  
Takayuki Honda ◽  
Atsushi Ohbuchi ◽  
Tetsuo Miyakoshi
Keyword(s):  
Molecular Level ◽  
Xrd Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Inorganic Analysis ◽  
Organic Analysis ◽  
Pyrolysis Gas ◽  
X Ray ◽  
Pyrolysis Gas Chromatography ◽  
Level Information ◽  
Physical Principles

Organic analysis and inorganic analysis are generally based on different physical principles, and for this reason it is difficult to analyze resins and pigments simultaneously. For these reasons, we have performed Py-GC/MS measurements of red-, yellow-, and green-colored lacquer films applied to lacquerware items to assess the feasibility of simultaneously detecting resin ingredients together with certain pigments. We have also compared our findings to the results of SEM-EDS, X-ray fluorescence spectrometry (XRF), and X-ray diffractometry (XRD) measurements. XRD analysis yielded molecular-level information (information on binding states) regarding mercury (Hg) and iron (Fe); however, the information obtained for arsenic (As) and sulfur (S) was insufficient. In contrast, Py-GC/MS analyses simultaneously yielded molecular-level information on arsenic (As) and sulfur (S) together with detection of the primary ingredients of the lacquer. For this reason, it shows that several pieces of information is provided easily and quickly when the colored lacquer cultural heritage is measured using the Py-GC/MS method.

Nitrogen Configuration of Polybenzoxazine Carbide

2015 ◽  
Vol 34 (3) ◽  
Author(s):  
Huachuan Zhang ◽  
Wu Gu ◽  
Rongqi Zhu ◽  
Qichao Ran ◽  
Yi Gu
Keyword(s):  
Mass Spectrometry ◽  
Photoelectron Spectroscopy ◽  
Carbon Materials ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Amine Nitrogen ◽  
X Ray ◽  
Pyrolysis Gas Chromatography ◽  
First Time ◽  
Pyridinic Nitrogen

AbstractCarbon materials should have specific centers for its functionalities. In this study, the specific centers of polybenzoxazine carbides were studied for the first time. Three classical benzoxazine monomers were chose as the object. The transformation of nitrogen configuration of polybenzoxazines carbides was characterized via pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) and X-ray photoelectron spectroscopy (XPS). The results showed that the tertiary amine nitrogen converted to pyridinic nitrogen and pyrrolic nitrogen incorporated in graphene residuals during the carbonization, which were the specific centers for the functionality.

The Characterization of Motor Vehicle Body Fillers

1980 ◽  
Vol 20 (3) ◽  
pp. 163-174 ◽  
Author(s):  
Janet M. Home ◽  
J. D. Twibell ◽  
K. W. Smalldon
Keyword(s):  
Gas Chromatography ◽  
Motor Vehicle ◽  
Fluorescence Spectrometry ◽  
Vehicle Body ◽  
Inorganic Analysis ◽  
Pyrolysis Gas ◽  
X Ray ◽  
Pyrolysis Gas Chromatography ◽  
Three Samples ◽  
Using Data

The compositions of typical British motor vehicle body fillers are reviewed and a systematic scheme is presented for their characterization, which routinely employs sample colour and analysis by pyrolysis gas chromatography and occasionally employs X-ray fluorescence spectrometry in addition. Eighteen samples obtained from manufacturers were all distinguishable and, from the examination of 121 casework samples, the discriminating power of colour and pyrolysis gas chromatography was estimated to be at least 0·92. Twenty-three samples in the casework collection were all similar in colour and produced similar pyrograms. A brief examination of this large group of samples, by X-ray fluorescence spectrometry, indicated that inorganic analysis provided a useful increase in discrimination. The pyrolysis products of polythene were used to calibrate the retention scale of the gas chromatograms (in methylene units) and peak heights were recorded relative to the height of the largest peak (usually styrene). Using data recorded in this manner a computer based system was developed for the comparison of pyrograms and for establishing the evidential value of a particular analysis. It is suggested that a similar approach could be used for the interpretation of pyrograms from a wide variety of other materials.

scholarly journals Analysis of paint traces to determine the ship responsible for a collision

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Lee ◽  
D. Lee ◽  
J. M. Seo
Keyword(s):  
Electron Microscopy ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
X Ray ◽  
Pyrolysis Gas Chromatography ◽  
Ship Collision ◽  
Derivative Thermogravimetry ◽  
Scanning Electron

AbstractAlthough there have been many instances of ship collision at sea in recent times, not much research has been conducted on the topic. In this study, paint from an actual site of ship collision was collected and analyzed as evidence. The amount of evidence collected from the ships involved in the collision is either small or has inconsistent morphology. In addition, the contaminants and samples are often mixed in this evidence, making its analysis difficult. Paint traces of the damaged ship and the ship suspected to be responsible for the collision were compared through scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM–EDS), attenuated total reflection–Fourier transform infrared spectroscopy (ATR–FTIR), thermogravimetry (TG) and derivative thermogravimetry (DTG), and pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS) analyses. The ship responsible for the collision could be identified by characterization and by performing a comparative analysis of the extracted paint. Among the methods used in this study, Py–GC/MS can sensitively analyze even similar paints, and identified styrene and phthalic anhydride as the most prominent components of the paint used as evidence. The results obtained can be used to investigate the evidence collected from collision sites and to determine the ship responsible for the collision.

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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