Detection and quantitation of a pheomelanin component in melanin pigments using pyrolysis-gas chromatography/tandem mass spectrometry system with multiple reaction monitoring mode

2012 ◽  
Vol 47 (2) ◽  
pp. 242-245 ◽  
Author(s):  
Anna Dzierżęga-Lęcznar ◽  
Slawomir Kurkiewicz ◽  
Krystyna Stępień
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Multiple Reaction Monitoring ◽  
Tandem Mass ◽  
Reaction Monitoring ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Tandem Mass Spectrometry ◽  
Multiple Reaction Monitoring Mode ◽  
Mass Spectrometry System

Quantification of FAMEs in biodiesel blends of various sources by gas chromatography tandem mass spectrometry

2015 ◽  
Vol 7 (8) ◽  
pp. 3372-3378 ◽  
Author(s):  
Syed Ghulam Musharraf ◽  
Muhammad Arif Ahmed ◽  
Noureen Zehra
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Tandem Mass Spectrometry ◽  
Multiple Reaction Monitoring ◽  
Tandem Mass ◽  
Reaction Monitoring ◽  
Biodiesel Blends ◽  
Quantification Method ◽  
Chromatography Tandem Mass Spectrometry

A quantification method for FAMEs by GC-MS/MS in multiple reaction monitoring (MRM) mode was developed and validated in the various biodiesels and their blends.

CTP synthetase activity assay by liquid chromatography tandem mass spectrometry in the multiple reaction monitoring mode

2019 ◽  
Vol 54 (11) ◽  
pp. 885-893
Author(s):  
Anne-Claire Boschat ◽  
Norbert Minet ◽  
Emmanuel Martin ◽  
Robert Barouki ◽  
Sylvain Latour ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Multiple Reaction Monitoring ◽  
Synthetase Activity ◽  
Tandem Mass ◽  
Reaction Monitoring ◽  
Activity Assay ◽  
Ctp Synthetase ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass ◽  
Multiple Reaction Monitoring Mode

scholarly journals Determination of Six Priority Phthalates and Di(Ethylhexyl) Adipate in Maize Tortilla by Gas Chromatography - Tandem Mass Spectrometry in Multiple Reaction Monitoring Mode

2018 ◽  
Vol 62 (2) ◽  
Author(s):  
Bianey Garcia Lara ◽  
Israel Enciso Donis ◽  
Katarzyna Wrobel ◽  
Kazimierz Wrobel
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Tandem Mass Spectrometry ◽  
Multiple Reaction Monitoring ◽  
Tandem Mass ◽  
Reaction Monitoring ◽  
Reliable Determination ◽  
Chromatography Tandem Mass Spectrometry ◽  
Butyl Phthalate

<p>The term “phthalates” refers to a group of esters of benzene-1,2-dicarboxylic acid, widely used as plasticizers therefore ubiquitous in food and in the environment. Several phthalates have been cataloged as endocrine disruptors and that is why there is a strong demand for their reliable determination, especially in food matrices.  In the present work, gas chromatography - tandem mass spectrometry (GC-MS/MS) procedure is proposed for the determination of six priority phthalates (dimethyl phthalate DMP, diethyl phthalate DEP, di(n-butyl) phthalate DBP, benzyl butyl phthalate BBP, di(2-ethylhexyl) phthalate DEHP, di(n-octyl) phthalate DnOP) and di(2-ethylhexyl) adipate DEHA, in maize tortillas and flour. Fresh tortilla sample was homogenized with acetonitrile/water (1:1) and after salting out (NaCl), hexane extract was obtained and dried by addition of Na<sub>2</sub>SO<sub>4</sub> anhydride. Finally, solvent was evaporated and the residue was reconstituted in isooctane for the injection to GC-MS/MS system; a model SCION GC-TQMS from Bruker Daltonics was used for the analysis. Quantification was carried out by multiple reaction monitoring (MRM) with the following time segments and m/z values of the precursor/product ion transitions: 0-7.90 min, 163/133 DMP; 7.47-8.53min, 149/121 DEP; 8.53-9.93 min, 149/121 DBP; 9.93-12.39 min, 149/93 BBP; 11.40-12.44 min, 129/111 DEHA; 12.20-13.22 min, 149/121 DEHP; 13.13-14.20 min, 149/121 DnOP. The evaluated method detection limits for seven compounds were in the range 0.11-1.84 µg kg<sup>-1</sup> (tortilla dry mass). The results obtained for fifteen tortilla samples purchased in Guanajuato state were as follows: 71.6-420 µg kg<sup>-1</sup> DEHP &gt; not detected (nd)-274 µg kg<sup>-1</sup> DBP &gt; nd-197 µg kg<sup>-1</sup> DEHA &gt; nd-73.2 µg kg<sup>-1</sup> DEP &gt; nd-10.6 µg kg<sup>-1</sup> DnOP. It was observed that prolonged storage and elevated temperature favored the accumulation of phthalates in tortillas.</p>

Highly Selective Determination of Macromolecular Chlorolignosulfonic Acids in River and Drinking Water Using Curie-Point Pyrolysis−Gas Chromatography−Tandem Mass Spectrometry

1997 ◽  
Vol 31 (7) ◽  
pp. 1946-1952 ◽  
Author(s):  
Albert-Jan Bulterman ◽  
Willem M. G. M. van Loon ◽  
Rudi T. Ghijsen ◽  
Udo A. Th. Brinkman ◽  
Ina M. Huitema ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Drinking Water ◽  
Tandem Mass ◽  
Pyrolysis Gas ◽  
Selective Determination ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Tandem Mass Spectrometry ◽  
Curie Point Pyrolysis
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