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4 Acta Chromatographica

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Comparative analysis of six different brands of date fruits

100%

Kursinszki L. , Kalász H. , Szőke É. , Adeghate E. , Hassan M. Y. , Adem A.

Acta Chromatographica

2011

tom Vol. 23, no. 4

603--610

Flavonoid composition of six different brands of Phoenix dactylifera L. date fruit (Lulu, Khalas, Khenaiz, Al-Medina, Razaiz, and Fardh) was identified, determined, and compared. The separation was done on a Zorbax Eclipse XDB-C18 (150 × 4.6 mm ID) reversed-phase column using gradient elution of 1% aqueous formic acid (A) and acetonitrile (B). Gradient conditions were 00.00 min, 13% B; 20.00 min, 34% B; 25.00 min, 64% B; 29 min, 64% B; 35 min, 13% B; 39 min, 13% B. Monitoring was done using ultraviolet absorbance and MS/MS.

HPLC analysis in drug level monitoring of K027

84%

Nurulain S. M. , Kalász H. , Szegi P. , Kuca K. , Adem A. , Hasan M. Y. B. , Hashemi F. , Tekes K.

Acta Chromatographica

2013

tom Vol. 25, no. 4

703--710

HPLC monitoring of pharmacokinetics was done in two body compartments of rats following intramuscular treatments with three different doses of K027, a bispyridinium mono-aldoxime type of antidotes to organoposphate intoxicated subjects. Reversed-phase HPLC separation with electrochemical detections was done to monitor the onset, the maximum level, and offset in K027 concentration. Serum level of K027 showed a fast onset, independently from the doses of K027. Drug level in brain was showing an essentially delayed kinetics.

HPLC analysis and detection of l-deprenyl

84%

Csomor V. , Laufer R. , Pöstényi Z. , Kalász H. , Adeghate E. , Nurulain S. M. , Tekes K. , Adem A.

Acta Chromatographica

2014

tom Vol. 26, no. 4

649--656

l-Deprenyl and its major metabolites were subjected to reversed-phase high-performance liquid chromatography (HPLC). The separation was monitored using both ultraviolet (UV) and electrochemical detectors. Ultraviolet absorbance detected l-deprenyl, l-nordeprenyl, l-methamphetamine, and l-amphetamine. Amperometric detection was specific and sensitive to the parent compound (l-deprenyl, a tertiary amine) only. Peaks of the major L-deprenyl metabolites did not give any comparable signal using amperometric monitoring.

HPLC determination of K027 in the body of pregnant mice

84%

Nurulain S. M. , Ojha S. , Dhanasekaran S. , Kuča K. , Nalini N. , Sharma C. , Adem A. , Kalász H.

Acta Chromatographica

2017

tom Vol. 29, no. 1

85--93

Distribution of K027, a hydrophilic, positively charged compound is monitored in the body of pregnant mice using high-performance liquid chromatography (HPLC). Intraperitoneal injection was done on the 18th day of pregnancy; the plasma and brains of the mother mice, placentae and the fetuses’ brains were dissected following 5, 15, 30, 60, and 120 min of treatment. Significant incorporation of K027 was found in the placentae and in fetuses’ brains relative to its levels in the mothers’ plasma and brains. This incorporation warns of a possible adjustment of dose of pyridinium aldoxime antidotes in case of pregnancy. Further studies with different gestational periods and animal models are warranted.