| # | Title | Journal | Year | Citations |
|---|
| 1 | Spectrophotometric Determination of Nitrate with a Single Reagent | Analytical Letters | 2003 | 787 |
| 2 | Fluorescence Quantum Yields of Tryptophan and Tyrosine | Analytical Letters | 1967 | 443 |
| 3 | Two-Point Calibration of Circular Dichrometer with d-10-Camphorsulfonic Acid | Analytical Letters | 1977 | 432 |
| 4 | An Electrochemical Detector for Liquid Chromatography with Picogram Sensitivity | Analytical Letters | 1973 | 368 |
| 5 | Estimation of Performance Characteristics of an Analytical Method Using the Data Set Of The Calibration Experiment | Analytical Letters | 1993 | 247 |
| 6 | ELECTROCHEMICAL BIOSENSORS: RECOMMENDED DEFINITIONS AND CLASSIFICATION* | Analytical Letters | 2001 | 234 |
| 7 | Radioimmunoassay of Plasma Dehydroepiandrosterone Sulfate | Analytical Letters | 1972 | 233 |
| 8 | Fluorescent Labeling of Fatty Acids with 9-Anthryldiazomethane (ADAM) for High Performance Liquid Chromatography | Analytical Letters | 1980 | 233 |
| 9 | Preparation and Use of a Boronic Acid Affinity Support for Separation and Quantitation of Glycosylated Hemoglobins | Analytical Letters | 1981 | 229 |
| 10 | Chromatographic Separation of Steroid Hormones for Use in Radioimmunoassay | Analytical Letters | 1972 | 222 |
| 11 | Some Recent Designs and Developments of Screen‐Printed Carbon Electrochemical Sensors/Biosensors for Biomedical, Environmental, and Industrial Analyses | Analytical Letters | 2004 | 205 |
| 12 | Highly Selective and Sensitive Preconcentration of Mercury Ion and Determination by Cold Vapor Atomic Absorption Spectroscopy | Analytical Letters | 2006 | 200 |
| 13 | Simultaneous Radioimmunoassay of Plasma Testosterone and Dihydrotestosterone | Analytical Letters | 1972 | 190 |
| 14 | Synthesis, Characterization, and Applications of Copper Nanoparticles | Analytical Letters | 2017 | 189 |
| 15 | Application of Improved Azomethine-H Method to the Determination of Boron in Soils and Plants | Analytical Letters | 1975 | 185 |
| 16 | Chemiluminescence - High Performance Liquid Chromatography of Phosphatidylcholine Hydroperoxide | Analytical Letters | 1987 | 180 |
| 17 | Application of Colloidal Gold in Protein Immobilization, Electron Transfer, and Biosensing | Analytical Letters | 2003 | 178 |
| 18 | Prospects of Nanomaterials in Biosensors | Analytical Letters | 2008 | 174 |
| 19 | Highly Selective Potassium Ion Responsive Liquid-Membrane Electrode | Analytical Letters | 1969 | 171 |
| 20 | Radioimmunoassay for Thromboxane B2 | Analytical Letters | 1976 | 169 |
| 21 | A High-Sensitive Glucose Amperometric Biosensor Based on Prussian Blue Modified Electrodes | Analytical Letters | 1994 | 165 |
| 22 | Nanostructured Zinc Oxide Particles in Chemically Modified Electrodes for Biosensor Applications | Analytical Letters | 2008 | 165 |
| 23 | Simultaneous Measurement of Plasma Progesterone, 17-Hydroxyprogesterone and Estradiol-17B by Radioimmunoassay | Analytical Letters | 1971 | 163 |
| 24 | Electroanalytical Application of Carbon Based Electrodes to the Pharmaceuticals | Analytical Letters | 2007 | 159 |
| 25 | Enzyme Electrodes Using Bioelectrocatalytic Reduction of Hydrogen Peroxide | Analytical Letters | 1990 | 152 |
| 26 | Reduction of the Anion Interference in Neutral Carrier Liquid-Membrane Electrodes Responsive to Cations | Analytical Letters | 1974 | 151 |
| 27 | Comparison of Full Factorial Design, Central Composite Design, and Box-Behnken Design in Chromatographic Method Development for the Determination of Fluconazole and Its Impurities | Analytical Letters | 2014 | 150 |
| 28 | MO-TMS Derivatives of Human Urinary Steroids for GC and GC-MS Studies | Analytical Letters | 1972 | 149 |
| 29 | Review: Recent Developments in Enzyme-Based Biosensors for Biomedical Analysis | Analytical Letters | 2012 | 148 |
| 30 | Detection of Pesticide in Drinking Water Using Real-Time Biospecific Interaction Analysis (BIA) | Analytical Letters | 1993 | 146 |
| 31 | Reconstructed Mass Spectra, A Novel Approach for the Utilization of Gas Chromatograph—Mass Spectrometer Data | Analytical Letters | 1974 | 145 |
| 32 | Improved Calcium Ion-Selective Electrode Based on a Neutral Carrier | Analytical Letters | 1975 | 143 |
| 33 | Radioimmunoassay of Plasma Cortisol | Analytical Letters | 1972 | 142 |
| 34 | A Versatile System for Sugar Analysis via Liquid Chromatography | Analytical Letters | 1975 | 138 |
| 35 | The GLC Separation of Hydroxyl-Substituted Amines of Biological Importance Including the Catecholamines. Preparation of Derivatives for Electron Capture Detection | Analytical Letters | 1968 | 134 |
| 36 | A Study on the In Vitro Antioxidant Activity of Juniper (Juniperus communisL.) Fruit Extracts | Analytical Letters | 2006 | 129 |
| 37 | Chiral Analysis of Ibuprofen Residues in Water and Sediment | Analytical Letters | 2009 | 128 |
| 38 | Nucleic Acid Hybridization Detected by Piezoelectric Resonance | Analytical Letters | 1988 | 126 |
| 39 | Fatty Acid Esterification with N,N-Dimethylformamide Dialkyl Acetals for GC Analysis | Analytical Letters | 1972 | 124 |
| 40 | Applications of Chemically Modified Electrodes to Analysis of Metal Ions | Analytical Letters | 1978 | 122 |
| 41 | Binding Studies on Substrate- and Enantio-Selective Molecularly Imprinted Polymers | Analytical Letters | 1991 | 120 |
| 42 | Chemiluminescence Detection of Amino Acids, Peptides, and Proteins Using Tris-2,2′-Bipyridine Ruthenium (III) | Analytical Letters | 1990 | 119 |
| 43 | Amino Acid N-Dimethylaminomethylene Alkyl Esters. New Derivatives for GC and GC-MS Studies | Analytical Letters | 1972 | 117 |
| 44 | Dynamic Fluorogenic Labelling of Pesticides for High Performance Liquid Chromatography: Detection of N-Methylcarbamates with o-Phthalaldehyde | Analytical Letters | 1977 | 117 |
| 45 | Effect of Ionic Liquids as Mobile Phase Additives on Retention of Catecholamines in Reversed-Phase High-Performance Liquid Chromatography | Analytical Letters | 2003 | 117 |
| 46 | Heavy Metals Pollution Source Identification and Probabilistic Health Risk Assessment of Shallow Groundwater in Onitsha, Nigeria | Analytical Letters | 2020 | 116 |
| 47 | Electrochemical Detection of Protein Using a Double Aptamer Sandwich | Analytical Letters | 2004 | 115 |
| 48 | Phenazines and Polyphenazines in Electrochemical Sensors and Biosensors | Analytical Letters | 2010 | 115 |
| 49 | Analytical Applications of Hollow Fiber Liquid Phase Microextraction (HF-LPME): A Review | Analytical Letters | 2012 | 115 |
| 50 | Preparation of a Chelating Resin by Immobilizing 1-(2-Pyridylazo) 2-Naphtol on Amberlite XAD-16 and Its Application of Solid Phase Extraction of Ni(II), Cd(II), Co(II), Cu(II), Pb(II), and Cr(III) in Natural Water Samples | Analytical Letters | 2003 | 114 |
