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Determination of methylmercury in marine biota samples with advanced mercury analyzer: Method validation

04-Jan-2015 | Author(s): Sabine Azemard , Emilia Vassileva, Food Chemistry, 2015

Publication date: 1 June 2015 Source:Food Chemistry, Volume 176 Author(s): Sabine Azemard , Emilia Vassileva In this paper, we present a simple, fast and cost-effective method for determination of methyl mercury (MeHg) in marine samples. All important parameters influencing the sample ...

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Enzyme-assisted process for DAG synthesis in edible oils

04-Jan-2015 | Author(s): Daniela von der Haar , Andreas Stäbler , Rolf Wichmann , Ute Schweiggert-Weisz, Food Chemistry, 2015

Publication date: 1 June 2015 Source:Food Chemistry, Volume 176 Author(s): Daniela von der Haar , Andreas Stäbler , Rolf Wichmann , Ute Schweiggert-Weisz This study deals with the enzymatic synthesis of diacylglycerols in rapeseed oil by the esterification of free fatty acids and ...

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Gas chromatography of safranal as preferable method for the commercial grading of saffron (Crocus sativus L.)

04-Jan-2015 | Author(s): Monica Bononi , Paola Milella , Fernando Tateo, Food Chemistry, 2015

Publication date: 1 June 2015 Source:Food Chemistry, Volume 176 Author(s): Monica Bononi , Paola Milella , Fernando Tateo We present a new extraction protocol, using ethyl alcohol as a solvent, to evaluate safranal by gas chromatography (GC). A linear response was obtained with R 2 ...

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Novel nonammonia preservative for concentrated natural rubber latex

30-Dec-2014 | Ting Wang, Hong‐Xing Gui, Wen‐Fei Zhang, Ke‐Xi Zhang, Wei‐Qiang Yu, Yi‐Min Li, Ri‐Zhong Zeng, Mao‐Fang Huang, Journal of Applied Polymer Science, 2014

ABSTRACT A derivative of sym‐triazine (HTT) was chosen as a new nonammonia preservative for concentrated natural rubber latex (CNRL) in place of NH3–TT/zinc oxide (ZnO). The preservation effects of the HTT for CNRL, drying characteristics, mechanical properties, and cytotoxicity of the ...

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Methane calibration burner and C‐factor determination with cone calorimeter – validation of the standardized calibration protocol

29-Dec-2014 | Eric Guillaume, Laurent Saragoza, Fire and Materials, 2014

SUMMARY The cone calorimeter is one of the major fire tests. In its reference standard ISO 5660‐1, the apparatus (and especially a characteristic of its orifice plate mass flow meter, called C‐Factor) is calibrated using a methane burner set at 5 kW. However, measurements performed in end‐use ...

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Enzymatic treatment applied as a final stage in E. globulus kraft pulp bleaching

26-Dec-2014 | Joana I. T. Sousa, Ana I. G. Moura, Dmitry V. Evtuguin, M. Graça V. S. Carvalho, Journal of Chemical Technology & Biotechnology, 2014

Abstract Background Brightness stability of bleached chemical pulps is often associated with the final bleaching stages that should provide the removal of chromogenic species responsible for brightness reversion without compromising the papermaking potential. Aiming at promoting higher ...

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UV Absorption Spectrum and Photodissociation Channels of the Simplest Criegee Intermediate (CH2OO)

24-Dec-2014 | Richard Dawes; Bin Jiang; Hua Guo, Journal of the American Chemical Society, 2014

The lowest-lying singlet states of the simplest Criegee intermediate (CH2OO) have been characterized along the O–O dissociation coordinate using explicitly correlated MRCI-F12 electronic structure theory and large active spaces. It is found that a high-level treatment of dynamic ...

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Measurement uncertainty estimated from accuracy assessment by using an in-house reference material: two case studies for the extraction of total PAH in industrial wastewater sludges

21-Dec-2014 | Author(s): Marcelo T. Pereyra , Beatriz S. Fernández Band , Adriana G. Lista, Microchemical Journal, 2014

Publication date: March 2015 Source:Microchemical Journal, Volume 119 Author(s): Marcelo T. Pereyra , Beatriz S. Fernández Band , Adriana G. Lista Measurement uncertainty is a required parameter to assure the reliability of analytical results because many management decisions ...

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Inorganic salts diluted in water probed by Raman spectrometry: Data processing and performance evaluation

21-Dec-2014 | Author(s): T.H. Kauffmann , M.D. Fontana, Sensors and Actuators B: Chemical, 2014

Publication date: 31 March 2015 Source:Sensors and Actuators B: Chemical, Volume 209 Author(s): T.H. Kauffmann , M.D. Fontana The paper reports on a methodology for the determination, by means of Raman spectrometry, of the concentration of inorganic salts dissolved in aqueous solutions. ...

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Structural transformation and tuning behavior induced by the propylamine concentration in hydrogen clathrate hydrates

09-Dec-2014 | Seongmin Park; Hyery Kang; Kyuchul Shin; Yutaek Seo; Huen Lee, Physical Chemistry Chemical Physics, 2014

The structures and the guest–host distributions of iso-propylamine (i-PA) and n-propylamine (n-PA) hydrates with hydrogen as a secondary guest were identified by powder X-ray diffraction and Raman spectroscopic analysis. The structure of 11.1 mol% i-PA + H2 hydrate was identified to be hexagonal ...

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