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51

On-line micro-volume introduction system developed for lower density than water extraction solvent and dispersive liquid–liquid microextraction coupled with flame atomic absorption spectrometry

Aristidis N. Anthemidis, Constantina Mitani, Paschalia Balkatzopoulou, Paraskevas D. Tzanavaras

Journal:

Analytica Chimica Acta

Year:

2012

Language:

english

File:

PDF, 208 KB

english, 2012

52

Highly selective flow injection spectrophotometric determination of gold based on its catalytic effect on the oxidation of variamine blue by potassium iodate in aqueous N,N-dimethylformamide medium

Demetrius G. Themelis, Anastasios V. Trellopoulos, Paraskevas D. Tzanavaras, Michael Sofoniou

Journal:

Year:

2007

Language:

english

File:

PDF, 125 KB

english, 2007

53

Amperometric determination of cyanides at the low ppb level by automated preconcentration based on gas diffusion coupled to sequential injection analysis

Constantinos K. Zacharis, Paraskevas D. Tzanavaras, Anastasios N. Voulgaropoulos, Bo Karlberg

Journal:

Year:

2009

Language:

english

File:

PDF, 369 KB

english, 2009

54

Hybrid sequential injection–flow injection manifold for the spectrophotometric determination of total sulfite in wines using o-phthalaldehyde and gas-diffusion

Paraskevas D. Tzanavaras, Eleni Thiakouli, Demetrius G. Themelis

Journal:

Year:

2009

Language:

english

File:

PDF, 247 KB

english, 2009

55

Rapid determination of methylxanthines in real samples by high-performance liquid chromatography using the new FastGradient® narrow-bore monolithic column

Paraskevas D. Tzanavaras, Constantinos K. Zacharis, Demetrius G. Themelis

Journal:

Year:

2010

Language:

english

File:

PDF, 439 KB

english, 2010

56

Development and validation of a rapid HPLC method for the determination of five banned fat-soluble colorants in spices using a narrow-bore monolithic column

Constantinos K. Zacharis, Fotini S. Kika, Paraskevas D. Tzanavaras, Pantelis Rigas, Efstratios R. Kyranas

Journal:

Year:

2011

Language:

english

File:

PDF, 227 KB

english, 2011

57

On-line cleavage of disulfide bonds by soluble and immobilized tris-(2-carboxyethyl)phosphine using sequential injection analysis

Paraskevas D. Tzanavaras, Constantina Mitani, Aristidis Anthemidis, Demetrius G. Themelis

Journal:

Year:

2012

Language:

english

File:

PDF, 453 KB

english, 2012

58

Automated determination of total captopril in urine by liquid chromatography with post-column derivatization coupled to on-line solid phase extraction in a sequential injection manifold

Theano D. Karakosta, Paraskevas D. Tzanavaras, Demetrius G. Themelis

Journal:

Year:

2012

Language:

english

File:

PDF, 289 KB

english, 2012

59

Reversed flow-injection manifold for the spectrophotometric determination of captopril based on its inhibitory effect on the Co(II)–2,2′-dipyridyl-2-pyridylhydrazone complex formation

Paraskevas D. Tzanavaras, Demetrius G. Themelis, Anastasios Economou, Georgios Theodoridis

Journal:

Year:

2002

Language:

english

File:

PDF, 111 KB

english, 2002

60

Flow injection spectrophotometric determination of fosfestrol, following on-line thermal induced digestion and using an orthophosphate calibration graph

Paraskevas D. Tzanavaras, Demetrius G. Themelis

Journal:

Year:

2003

Language:

english

File:

PDF, 135 KB

english, 2003

61

On-line dilution flow injection manifold for the selective spectrophotometric determination of ascorbic acid based on the Fe(II)-2,2′-dipyridyl-2-pyridylhydrazone complex formation

Demetrius G. Themelis, Paraskevas D. Tzanavaras, Fotini S. Kika

Journal:

Year:

2001

Language:

english

File:

PDF, 146 KB

english, 2001

62

Flow injection manifold for the direct spectrophotometric determination of bismuth in pharmaceutical products using Methylthymol Blue as a chromogenic reagent

Themelis, Demetrius G., Tzanavaras, Paraskevas D., Papadimitriou, John K.

Journal:

The Analyst (Royal Society of Chemistry)

Year:

2001

Language:

english

File:

PDF, 52 KB

english, 2001

63

Selective fluorimetric method for the determination of histamine in seafood samples based on the concept of zone fluidics

Tzanavaras, Paraskevas D., Deda, Olga, Karakosta, Theano D., Themelis, Demetrius G.

Journal:

Analytica Chimica Acta

Year:

2013

Language:

english

File:

PDF, 579 KB

english, 2013

64

Determination of rimantadine in human urine by HPLC using a monolithic stationary phase and on-line post-column derivatization

Zacharis, Constantinos K., Tzanavaras, Paraskevas D., Vlessidis, Athanasios G.

Journal:

Journal of Separation Science

Year:

2013

Language:

english

File:

PDF, 216 KB

english, 2013

65

Direct and Selective Flow-Injection Method for the Simultaneous Spectrophotometric Determination of Calcium and Magnesium in Red and White Wines Using Online Dilution Based on “Zone Sampling”

Themelis, Demetrius G., Tzanavaras, Paraskevas D., Trellopoulos, Anastasios V., Sofoniou, Michael C.

Journal:

Journal of Agricultural and Food Chemistry

Year:

2001

Language:

english

File:

PDF, 74 KB

english, 2001

66

A GREEN HPLC METHOD FOR THE DETERMINATION OF N-ACETYLCYSTEINE USING POST-COLUMN DERIVATIZATION WITH METHYL-PROPIOLATE

Tzanavaras, Paraskevas D.

Journal:

Instrumentation Science & Technology

Year:

2012

Language:

english

File:

PDF, 258 KB

english, 2012

67

Guest Editorial

Tzanavaras, Paraskevas D.

Journal:

Analytical Letters

Year:

2011

Language:

english

File:

PDF, 160 KB

english, 2011

68

Zwitterionic hydrophilic interaction chromatography coupled with post-column derivatization for the analysis of glutathione in wine samples

Zacharis, Constantinos K., Tzanavaras, Paraskevas D., Karakosta, Theano D., Themelis, Demetrius G.

Journal:

Analytica Chimica Acta

Year:

2013

Language:

english

File:

PDF, 782 KB

english, 2013

69

Development and validation of a rapid ultra high pressure liquid chromatographic method for the determination of methylxanthines in herbal infusions

Zacharis, Constantinos K., Kika, Fotini S., Tzanavaras, Paraskevas D., Fytianos, Konstantinos

Journal:

Journal of Chromatography B

Year:

2013

Language:

english

File:

PDF, 581 KB

english, 2013

70

Trends and applications of fast liquid chromatography in bioanalysis

Zacharis, Constantinos K., Tzanavaras, Paraskevas D.

Journal:

Journal of Chromatography B

Year:

2013

Language:

english

File:

PDF, 267 KB

english, 2013

71

Determination of glutathione in baker's yeast by capillary electrophoresis using methyl propiolate as derivatizing reagent

Tsardaka, Eirini-Chrysanthi, Zacharis, Constantinos K., Tzanavaras, Paraskevas D., Zotou, Anastasia

Journal:

Journal of Chromatography A

Year:

2013

Language:

english

File:

PDF, 404 KB

english, 2013

72

Automated derivatization and fluorimetric determination of biogenic amines in milk by zone fluidics coupled to liquid chromatography

Notou, Maria, Zotou, Anastasia, Tzanavaras, Paraskevas D., Themelis, Demetrius G.

Journal:

Journal of Chromatography A

Year:

2014

Language:

english

File:

PDF, 521 KB

english, 2014

73

On-Line Derivatization of N -acetylcysteine Using Ethyl-Propiolate as a Novel Advantageous Reagent and Sequential Injection Analysis

Tzanavaras, Paraskevas D., Zacharis, Constantinos K., Themelis, Demetrius G.

Journal:

Analytical Letters

Year:

2010

Language:

english

File:

PDF, 336 KB

english, 2010

74

Generic Automated Fluorimetric Assay for the Quality Control of Gamma Aminobutyric Acid-Analogue Anti-Epileptic Drugs Using Sequential Injection

Themelis, Demetrius G., Tzanavaras, Paraskevas D., Boulimari, Euridiki A.

Journal:

Analytical Letters

Year:

2010

Language:

english

File:

PDF, 328 KB

english, 2010

75

Automated Determination of Hydrogen Peroxide at the Micro-Molar Level in Rainwater and Snow Using a Stopped-Flow Approach in a Hybrid Sequential Injection/Flow Injection Manifold

Tzanavaras, Paraskevas D., Boulimari, Euridiki

Journal:

Analytical Letters

Year:

2012

Language:

english

File:

PDF, 429 KB

english, 2012

76

Rapid flow injection spectrophotometric determination of monofluorophosphates in toothpastes after on-line hydrolysis by alkaline phosphatase immobilized on a cellulose nitrate membrane

Tzanavaras, Paraskevas D., Themelis, Demetrius G.

Journal:

The Analyst (Royal Society of Chemistry)

Year:

2001

Language:

english

File:

PDF, 78 KB

english, 2001

77

Normal and differential demasking flow-injection manifold for the direct spectrophotometric determination of zinc(ii) in biological materials and pharmaceutical formulations

Themelis, Demetrius G., Tzanavaras, Paraskevas D., Liakou, Aspasia A., Tzanavaras, Harrisis D., Papadimitriou, John K.

Journal:

The Analyst (Royal Society of Chemistry)

Year:

2000

Language:

english

File:

PDF, 139 KB

english, 2000

78

Validated Flow Injection Spectrophotometric Assay for the Quality and Stability Control of Gemfibrozil Tablets

Tzanavaras, Paraskevas D., Themelis, Demetrius G.

Journal:

Analytical Letters

Year:

2005

Language:

english

File:

PDF, 139 KB

english, 2005

79

Zone Fluidics Derivatization of Thiols Under Flow Conditions by 2-Chloro-1-methylquinolinium Tetrafluoroborate

Tzanavaras, Paraskevas D., Aristeridou, Magda, Bald, Edward, Głowacki, Rafał

Journal:

Analytical Letters

Year:

2014

Language:

english

File:

PDF, 550 KB

english, 2014

80

NBD-Cl as a Post-Column Reagent for Primary and Secondary Amines after Separation by Ion-Exchange Chromatography

Zacharis, Constantinos K., Tzanavaras, Paraskevas D., Mouroutis, Panagiotis N., Rigas, Pantelis G.

Journal:

Analytical Letters

Year:

2011

Language:

english

File:

PDF, 464 KB

english, 2011

81

Special Issue on Automated Flow Injection Techniques

Tzanavaras, Paraskevas D.

Journal:

Analytical Letters

Year:

2013

Language:

english

File:

PDF, 127 KB

english, 2013

82

High-Throughput Determination of Quinine in Beverages and Soft Drinks Based on Zone-Fluidics Coupled to Monolithic Liquid Chromatography

Tzanavaras, Paraskevas D., Zacharis, Constantinos K., Karakosta, Theano D., Zotou, Anastasia, Themelis, Demetrius G.

Journal:

Analytical Letters

Year:

2013

Language:

english

File:

PDF, 515 KB

english, 2013

83

Automated Derivatization of Pharmaceutically Active Thiols Under Flow Conditions Using an o-Phthalaldehyde/Glycine Fluorogenic System and Sequential Injection Analysis

Karakosta, Theano D., Tzanavaras, Paraskevas D.

Journal:

Analytical Letters

Year:

2011

Language:

english

File:

PDF, 297 KB

english, 2011

84

Recent Advances in the Analysis of Organic Impurities of Active Pharmaceutical Ingredients and Formulations: A Review

D. Tzanavaras, Paraskevas

Journal:

Current Organic Chemistry

Year:

2010

Language:

english

File:

PDF, 790 KB

english, 2010

85

High Throughput Automated Determination of Glutathione Based on the Formation of a UV-Absorbing Thioacrylate Derivative

K. Zacharis, Constantinos, D. Tzanavaras, Paraskevas

Journal:

Combinatorial Chemistry & High Throughput Screening

Year:

2010

Language:

english

File:

PDF, 487 KB

english, 2010

86

Use of a Core-Shell Column for the Development of a Green LC Method for Thiol Determination in Fresh Fruits Following Derivatization with Methyl Propiolate

Samara, Alexandra, Zotou, Anastasia, Tzanavaras, Paraskevas

Journal:

Food Analytical Methods

Year:

2016

Language:

english

File:

PDF, 643 KB

english, 2016

87

Development and Validation of a Flow-Injection Assay for Dissolution Studies of the Anti-depressant Drug Venlafaxine

TZANAVARAS, Paraskevas D., VERDOUKAS, Aspasia, THEMELIS, Demetrius G.

Journal:

Analytical Sciences

Year:

2005

Language:

english

File:

PDF, 68 KB

english, 2005

88

Automated fluorimetric determination of the genotoxic impurity hydrazine in allopurinol pharmaceuticals using zone fluidics and on-line solid phase extraction

Tzanavaras, Paraskevas D., Themistokleous, Stefanos, Zacharis, Constantinos K.

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2020

Language:

english

File:

PDF, 1.28 MB

english, 2020

89

Trace analysis of rimantadine in human urine after dispersive liquid liquid microextraction followed by liquid chromatography‐post column derivatization

Zacharis, Constantinos K., Tzanavaras, Paraskevas D.

Journal:

Journal of Separation Science

Year:

2019

Language:

english

File:

PDF, 914 KB

english, 2019

90

Micelles Mediated Zone Fluidics Method for Hydrazine Determination in Environmental Samples

Karakosta, Theano D., Christophoridis, Christophoros, Fytianos, Konstantinos, Tzanavaras, Paraskevas D.

Journal:

Year:

2019

File:

PDF, 1.19 MB

2019

91

Solid-Phase Microextraction

Zacharis, Constantinos K., Tzanavaras, Paraskevas D.

Journal:

Year:

2020

Language:

english

File:

PDF, 176 KB

english, 2020

92

Fluorimetric Method for the Determination of Histidine in Random Human Urine Based on Zone Fluidics

Alevridis, Antonios, Tsiasioti, Apostolia, Zacharis, Constantinos K., Tzanavaras, Paraskevas D.

Journal:

Year:

2020

File:

PDF, 995 KB

2020

93

Automated fluorimetric sensor for hydrazine determination in water samples based on the concept of zone fluidics

Tsiasioti, Apostolia, Tzanavaras, Paraskevas D.

Journal:

Environmental Science and Pollution Research

Year:

2020

File:

PDF, 392 KB

2020

94

Study of the Oxidative Forced Degradation of Glutathione in Its Nutraceutical Formulations Using Zone Fluidics and Green Liquid Chromatography

Tsiasioti, Apostolia, Zacharis, Constantinos K., Zotou, Anastasia-Stella, Tzanavaras, Paraskevas D.

Journal:

Year:

2020

File:

PDF, 2.94 MB

2020

95

Bioanalytical HPLC Applications of In-Tube Solid Phase Microextraction: A Two-Decade Overview

Manousi, Natalia, Tzanavaras, Paraskevas D., Zacharis, Constantinos K.

Journal:

Year:

2020

File:

PDF, 3.14 MB

2020

96

UHPLC-fluorescence method for the determination of trace levels of hydrazine in allopurinol and its formulations: Validation using total-error concept

Christofi, Marlen, Markopoulou, Catherine K., Tzanavaras, Paraskevas D., Zacharis, Constantinos K.

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Year:

2020

File:

PDF, 1.80 MB

2020

97

Selective reaction of homocysteine with o âphthalaldehyde under flow conditions in highly alkaline medium: fluorimetric determination using zone fluidics

Tsiasioti, Apostolia, Andreou, Aikaterini, Tzanavaras, Paraskevas D.

Journal:

Year:

2020

File:

PDF, 922 KB

2020

98

Homogeneous liquid liquid extraction using salt as mass separating agent for the ultra high pressure liquid chromatographic determination of doxorubicin in human urine

Stratigou, Ioanna-Chrysoula, Tsiasioti, Apostolia, Tzanavaras, Paraskevas D., Markopoulou, Catherine K., Fytianos, Konstantinos, Zacharis, Constantinos K.

Journal:

Microchemical Journal

Year:

2020

File:

PDF, 1.93 MB

2020

99

Determination of glutathione and glutathione disulfide using zone fluidics and fluorimetric detection

Tsiasioti, Apostolia, Tzanavaras, Paraskevas D.

Journal:

Year:

2021

File:

PDF, 2.96 MB

2021