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1

Quality assessment for tramadol in pharmaceutical preparations with thin layer chromatography and densitometry

Jan Krzek, Małgorzata Starek

Journal:

Biomedical Chromatography

Year:

2004

Language:

english

File:

PDF, 356 KB

english, 2004

2

A review of analytical techniques for determination of oxicams, nimesulide and nabumetone

Małgorzata Starek, Jan Krzek

Journal:

Year:

2009

Language:

english

File:

PDF, 465 KB

english, 2009

3

Reversed-phase thin-layer chromatography technique for the comparison of the lipophilicity of selected non-steroidal anti-inflammatory drugs

Starek, Małgorzata, Komsta, Łukasz, Krzek, Jan

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2013

Language:

english

File:

PDF, 221 KB

english, 2013

4

Determination of danofloxacin and its photodegradation products by HPLC-DAD. Kinetic evaluation of the degradation process and identification of photoproducts by mass spectrometry

Hubicka, Urszula, Żuromska-Witek, Barbara, Żmudzki, Paweł, Stanisławski, Michał, Krzek, Jan

Journal:

Analytical Methods

Year:

2014

Language:

english

File:

PDF, 519 KB

english, 2014

5

Direct separation, identification and quantification of epimers 22R and 22S of budesonide by capillary gas chromatography on a short analytical column with Rtx®-5 stationary phase

Jan Krzek, Janusz S. Czekaj, Włodzimierz Rzeszutko, Anna Jończyk

Journal:

Journal of Chromatography B

Year:

2004

Language:

english

File:

PDF, 278 KB

english, 2004

6

Simultaneous identification and quantitative determination of neomycin sulfate, polymixin B sulfate, zinc bacytracin and methyl and propyl hydroxybenzoates in ophthalmic ointment by TLC

Jan Krzek, Małgorzata Starek, Anna Kwiecień, Włodzimierz Rzeszutko

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2001

Language:

english

File:

PDF, 161 KB

english, 2001

7

Densitometric determination of diclofenac, 1-(2,6-dichlorophenyl)indolin-2-one and indolin-2-one in pharmaceutical preparations and model solutions

Jan Krzek, Malgorzała Starek

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2002

Language:

english

File:

PDF, 254 KB

english, 2002

8

The HPLC determination of propane-1,2,3-triyl trinitrite and impurities: (2RS)-3-hydroxypropane-1,2-diyl dinitrate and 2-hydroxypropane-1,3-diyl dinitrate in ointment

Jan Krzek, Maria Moniczewska, Grażyna Zabierowska-Ślusarczyk

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2003

Language:

english

File:

PDF, 216 KB

english, 2003

9

Densitometric determination of impurities in drugs: Part IV. Determination of N-(4-aminobenzoyl)-l-glutamic acid in preparations of folic acid

Jan Krzek, Anna Kwiecień

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

1999

Language:

english

File:

PDF, 114 KB

english, 1999

10

Determination of budesonide R(+) and S(−) isomers in pharmaceuticals by thin-layer chromatography with UV densitometric detection

J. Krzek, U. Hubicka, M. Dabrowska-Tylka, E. Leciejewicz-Ziemecka

Journal:

Chromatographia

Year:

2002

Language:

english

File:

PDF, 339 KB

english, 2002

11

Separation and determination of rofecoxib and its degradation products by TLC chromatography

M. Starek, J. Krzek, J. Dechnik

Journal:

Journal of Analytical Chemistry

Year:

2009

Language:

english

File:

PDF, 165 KB

english, 2009

12

Simultaneous Determination of Cefuroxime Axetil and Cefuroxime in Pharmaceutical Preparations by Thin-Layer Chromatography and Densitometry

J. Krzek, M. Dąbrowska-Tylka

Journal:

Chromatographia

Year:

2003

Language:

english

File:

PDF, 285 KB

english, 2003

13

RP-TLC Determination of S(+) and R(−) Ibuprofen in Drugs With the Application of Chiral Mobile Phase and UV Densitometric Detection

J. Krzek, M. Starek, D. Jelonkiewicz

Journal:

Chromatographia

Year:

2005

Language:

english

File:

PDF, 485 KB

english, 2005

14

Evaluation of a TLC Densitometric Method for Analysis of Azole Antifungal Agents

Radosław J. Ekiert, Jan Krzek, Włodzimierz Rzeszutko

Journal:

Chromatographia

Year:

2008

Language:

english

File:

PDF, 244 KB

english, 2008

15

Determination of Piroxicam and Degradation Products in Drugs by TLC

Małgorzata Starek, Jan Krzek, Monika Tarsa, Marek Żylewski

Journal:

Chromatographia

Year:

2009

Language:

english

File:

PDF, 380 KB

english, 2009

16

Chromatographic and electrophoretic techniques used in the analysis of triazole antifungal agents—a review

R.J. Ekiert, J. Krzek, P. Talik

Journal:

Year:

2010

Language:

english

File:

PDF, 275 KB

english, 2010

17

Simultaneous Determination of Fusidic Acid, m‐ and p‐Hydroxybenzoates and Butylhydroxyanisole by TLC with Densitometric Detection in UV

Krzek, Jan, Hubicka, Urszula, Szczepańczyk, Justyna, Kwiecień, Anna, Rzeszutko, Włodzimierz

Journal:

Journal of Liquid Chromatography & Related Technologies

Year:

2006

Language:

english

File:

PDF, 191 KB

english, 2006

18

Analytical Techniques Used for Determination of Methylxanthines and their Analogues—Recent Advances

Talik, P., Krzek, J., Ekiert, R. J.

Journal:

Separation & Purification Reviews

Year:

2012

Language:

english

File:

PDF, 557 KB

english, 2012

19

Chromatographic and Densitometric Analysis of Hydrochlorothiazide, Walsartan, Kandesartan, and Enalapril in Selected Complex Hypotensive Drugs

Stolarczyk, Mariusz, Anna, Maślanka, Krzek, Jan

Journal:

Journal of Liquid Chromatography & Related Technologies

Year:

2008

Language:

english

File:

PDF, 163 KB

english, 2008

20

Fibrin clot properties in women heterozygous for factor V Leiden mutation: Effects of oral contraceptives

Krzek, Marzena, Ciesla-Dul, Mariola, Zabczyk, Michal, Undas, Anetta

Journal:

Thrombosis Research

Year:

2012

Language:

english

File:

PDF, 154 KB

english, 2012

21

Densitometric quantification of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG) in extracts of fresh samples of Erigeron canadensis collected at different stages of growth

Ellnain, Marek, Hubicka, Urszula, Żuromska, Barbara, Janeczko, Zbigniew, Krzek, Jan

Journal:

JPC - Journal of Planar Chromatography - Modern TLC

Year:

2011

Language:

english

File:

PDF, 69 KB

english, 2011

22

Dependence of the kinetic and thermodynamic parameters on hydrophilic–lipophilic character of alprazolam, clonazepam, diazepam, doxepin and haloperidol in alkaline environment

Maślanka, Anna, Krzek, Jan, Szlósarczyk, Marek, Żmudzki, Paweł, Wach, Katarzyna

Journal:

International Journal of Pharmaceutics

Year:

2013

Language:

english

File:

PDF, 657 KB

english, 2013

23

Determination of sparfloxacin and its photodegradation products by thin-layer chromatography with densitometry detection. Kinetic evaluation of the degradation process and identification of photoproduct by mass spectrometry

Hubicka, Urszula, Żuromska-Witek, Barbara, Żmudzki, Paweł, Maślanka, Anna, Kwapińska, Natalia, Krzek, Jan

Journal:

Analytical Methods

Year:

2013

Language:

english

File:

PDF, 414 KB

english, 2013

24

Determination of nitrites and nitrates in drinking water using capillary electrophoresis

Martínková, Eva, Křžek, Tomáš, Coufal, Pavel

Journal:

Chemical Papers

Year:

2014

Language:

english

File:

PDF, 257 KB

english, 2014

25

Photodegradation assessment of ciprofloxacin, moxifloxacin, norfloxacin and ofloxacin in the presence of excipients from tablets by UPLC-MS/MS and DSC

Hubicka, Urszula, Żmudzki, Paweł, Talik, Przemysław, Żuromska-Witek, Barbara, Krzek, Jan

Journal:

Chemistry Central Journal

Year:

2013

Language:

english

File:

PDF, 493 KB

english, 2013

26

Separation and characterization of ciprofloxacin, difloxacin, lomefloxacin, norfloxacin, and ofloxacin oxidation products under potassium permanganate treatment in acidic medium by UPLC-MS/MS

Hubicka, Urszula, Żmudzki, Paweł, Żuromska-Witek, Barbara, Zajdel, Paweł, Pawłowski, Maciej, Krzek, Jan

Journal:

Year:

2013

Language:

english

File:

PDF, 929 KB

english, 2013

27

Analysis of lignans in Schisandra chinensis fruits, leaves, biomasses from in vitro cultures and food supplements

Ekiert, Radosław J., Szopa, Agnieszka, Ekiert, Halina, Krzek, Jan, Dzik, Ewa

Journal:

Journal of Functional Foods

Year:

2013

Language:

english

File:

PDF, 552 KB

english, 2013

28

Stability of Atenolol, Acebutolol and Propranolol in Acidic Environment Depending on its Diversified Polarity

Krzek, Jan, Kwiecień, Anna, Żylewski, Marek

Journal:

Pharmaceutical Development and Technology

Year:

2006

Language:

english

File:

PDF, 202 KB

english, 2006

29

Voltammetric Determination of Zinc, Copper, and Selenium in Selected Raw Plant Material

Szlósarczyk, Marek, Piech, Robert, Paśko, Paweł, Opoka, Włodzimierz, Krzek, Jan

Journal:

Analytical Letters

Year:

2011

Language:

english

File:

PDF, 329 KB

english, 2011

30

DETERMINATION OF DANOFLOXACIN AND ITS PHOTODEGRADATION PRODUCTS BY THIN-LAYER CHROMATOGRAPHY: KINETIC EVALUATION OF DEGRADATION PROCESS

Hubicka, Urszula, Żuromska-Witek, Barbara, Knapczyk, Danuta, Krzek, Jan

Journal:

Journal of Liquid Chromatography & Related Technologies

Year:

2014

Language:

english

File:

PDF, 375 KB

english, 2014

31

A degradation study of cefepime hydrochloride in solutions under various stress conditions by TLC-densitometry

Dąbrowska, Monika, Starek, Małgorzata, Krzek, Jan, Papp, Elżbieta, Król, Piotr

Journal:

Biomedical Chromatography

Year:

2015

Language:

english

File:

PDF, 500 KB

english, 2015

32

Determination of Gentamicin Sulphate in Injection Solutions by Derivative Spectrophotometry

Krzek, J., Woltyńska, H., Hubicka, U.

Journal:

Analytical Letters

Year:

2009

Language:

english

File:

PDF, 238 KB

english, 2009

33

Roxithromycin degradation by acidic hydrolysis and photocatalysis

Kwiecień, Anna, Krzek, Jan, Żmudzki, Paweł, Matoga, Urszula, Długosz, Maciej, Szczubiałka, Krzysztof, Nowakowska, Maria

Journal:

Analytical Methods

Year:

2014

Language:

english

File:

PDF, 487 KB

english, 2014

34

Stability of ciprofloxacin and norfloxacin in the presence and absence of metal ions in acidic solution

Hubicka, Urszula, Krzek, Jan, Walczak, Maria

Journal:

Pharmaceutical Development and Technology

Year:

2010

Language:

english

File:

PDF, 1.55 MB

english, 2010

35

TLC-UV and -VIS Densitometric Detection Method for Determination of Oxyphenonium Bromide and its Degradation Products in Tablets

Hubicka, Urszula, Krzek, Jan, Szczyrbowska, Olga

Journal:

Journal of Liquid Chromatography & Related Technologies

Year:

2009

Language:

english

File:

PDF, 388 KB

english, 2009

36

Application of hanging copper amalgam drop electrode for voltammetric determination of selenium content in fruiting bodies of selected mushrooms

Piech, Robert, Szlósarczyk, Marek, Opoka, Włodzimierz, Paczosa-Bator, Beata, Baś, Bogusław, Krzek, Jan, Muszyńska, Bożena

Journal:

International Journal of Environmental & Analytical Chemistry

Year:

2014

Language:

english

File:

PDF, 252 KB

english, 2014

37

TLC-densitometric determination of sulfasalazine and its possible impurities in pharmaceutical preparations

Kwiecień, A., Piątek, K., Żmudzki, P., Krzek, J.

Journal:

Acta Chromatographica

Year:

2015

Language:

english

File:

PDF, 100 KB

english, 2015

38

Oxidative stress as an etiological factor and a potential treatment target of psychiatric disorders. Part 1. Chemical aspects and biological sources of oxidative stress in the brain

Moniczewski, Andrzej, Gawlik, Maciej, Smaga, Irena, Niedzielska, Ewa, Krzek, Jan, Przegaliński, Edmund, Pera, Joanna, Filip, Małgorzata

Journal:

Pharmacological Reports

Year:

2015

Language:

english

File:

PDF, 733 KB

english, 2015

39

TLC-densitometric determination of tenoxicam and its degradation products in pharmaceutical preparations and after hydrolysis in solutions

Starek, Małgorzata, Krzek, Jan, Tarsa, Monika

Journal:

JPC - Journal of Planar Chromatography - Modern TLC

Year:

2011

Language:

english

File:

PDF, 202 KB

english, 2011

40

Assay of β-Carotene in Dietary Supplements and Fruit Juices by TLC-Densitometry

Starek, Małgorzata, Guja, Anna, Dąbrowska, Monika, Krzek, Jan

Journal:

Food Analytical Methods

Year:

2015

Language:

english

File:

PDF, 511 KB

english, 2015

41

Oxidative stress as an etiological factor and a potential treatment target of psychiatric disorders. Part 2. Depression, anxiety, schizophrenia and autism

Smaga, Irena, Niedzielska, Ewa, Gawlik, Maciej, Moniczewski, Andrzej, Krzek, Jan, Przegaliński, Edmund, Pera, Joanna, Filip, Małgorzata

Journal:

Pharmacological Reports

Year:

2015

Language:

english

File:

PDF, 563 KB

english, 2015

42

High-density cholesterol and apolipoprotein AI as modifiers of plasma fibrin clot properties in apparently healthy individuals

Ząbczyk, Michał, Hońdo, Łukasz, Krzek, Marzena, Undas, Anetta

Journal:

Blood Coagulation & Fibrinolysis

Year:

2013

Language:

english

File:

PDF, 250 KB

english, 2013

43

A hybrid adsorbent/visible light photocatalyst for the abatement of microcystin-LR in water

Długosz, M., Kwiecień, A., Żmudzki, P., Bober, B., Krzek, J., Bialczyk, J., Nowakowska, M., Szczubiałka, K.

Journal:

Chemical Communications

Year:

2015

Language:

english

File:

PDF, 2.08 MB

english, 2015

44

Lipophilicity study of fifteen fluoroquinolones by reversed-phase thin-layer chromatography

Hubicka, Urszula, Żuromska-Witek, Barbara, Komsta, Łukasz, Krzek, Jan

Journal:

Analytical Methods

Year:

2015

Language:

english

File:

PDF, 2.14 MB

english, 2015

45

Chromatographic-Densitometric Analysis of Chosen Fluoroquinolones on TLC Plates Using Mobile Phases with Different Viscosity

Krzek, Jan, Żuromska-Witek, Barbara, Hubicka, Urszula, Kaczmarska, Marta

Journal:

Journal of Liquid Chromatography & Related Technologies

Year:

2015

Language:

english

File:

PDF, 846 KB

english, 2015

46

Derivative spectrophotometric method for simultaneous determination of zofenopril and fluvastatin in mixtures and pharmaceutical dosage forms

Stolarczyk, Mariusz, Maślanka, Anna, Apola, Anna, Rybak, Wojciech, Krzek, Jan

Journal:

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Year:

2015

Language:

english

File:

PDF, 640 KB

english, 2015

47

TLC determination of piroxicam, tenoxicam, celecoxib and rofecoxib in biological material

Starek, M., Krzek, J., Rotkegel, P.

Journal:

Journal of Analytical Chemistry

Year:

2015

Language:

english

File:

PDF, 306 KB

english, 2015

48

Pharmacological and therapeutic properties of new derivatives of renin inhibitors and endothelin receptor antagonists, and the methods of their determination

Stolarczyk, Mariusz, Apola, Anna, Maślanka, Anna, Krzek, Jan

Journal:

Analytical Methods

Year:

2015

Language:

english

File:

PDF, 3.14 MB

english, 2015

49

TLC Chromatographic-Densitometric Assay of Ibuprofen and Its Impurities

Starek, M., Krzek, J.

Journal:

Journal of Chromatographic Science

Year:

2010

Language:

english

File:

PDF, 711 KB

english, 2010

50

Photocatalytic degradation of sulfamethoxazole in aqueous solution using a floating TiO2-expanded perlite photocatalyst

Długosz, Maciej, Żmudzki, Paweł, Kwiecień, Anna, Szczubiałka, Krzysztof, Krzek, Jan, Nowakowska, Maria

Journal:

Journal of Hazardous Materials

Year:

2015

Language:

english

File:

PDF, 672 KB

english, 2015