Publications by authors named "A Helenkar"

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The role of the acquisition methods in the analysis of natural and synthetic steroids and cholic acids by gas chromatography-mass spectrometry.
N Andrási, A Helenkár, A Vasanits-Zsigrai, Gy Záray, I Molnár-Perl

J Chromatogr A· November 2011

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Derivatization and fragmentation pattern analysis of natural and synthetic steroids, as their trimethylsilyl (oxime) ether derivatives by gas chromatography mass spectrometry: analysis of dissolved steroids in wastewater samples.
N Andrási, A Helenkár, Gy Záray, A Vasanits, I Molnár-Perl

J Chromatogr A· April 2011

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The role of the acquisition methods in the analysis of the non-steroidal anti-inflammatory drugs in Danube River by gas chromatography-mass spectrometry.
A Helenkár, A Sebok, Gy Záray, I Molnár-Perl, A Vasanits-Zsigrai

Talanta· July 2010

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Multiresidue analysis of pollutants as their trimethylsilyl derivatives, by gas chromatography-mass spectrometry.
A Sebok, A Vasanits-Zsigrai, A Helenkár, Gy Záray, I Molnár-Perl

J Chromatogr A· March 2009

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Gas chromatography-mass spectrometry of the trimethylsilyl (oxime) ether/ester derivatives of cholic acids: their presence in the aquatic environment.
A Sebok, K Sezer, A Vasanits-Zsigrai, A Helenkár, Gy Záray

J Chromatogr A· November 2008

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