A. Egizabal, O. Zuloaga. “Comparison of Microwave-Assisted Extraction and Soxhlet Extraction for Phenols in Soil Samples Using Experimental Designs.” Analyst 123, no. 8 (1998): 1679–84. doi:10.1039/a802117a.

A. Sarmiento, M. Maguregui. “Raman Spectroscopy as a Tool to Diagnose the Impacts of Combustion and Greenhouse Acid Gases on Properties of Built Heritage.” Journal of Raman Spectroscopy 39, no. 8 (2008): 1042–49. doi:10.1002/jrs.1937.

Aguirre, Josu, Ekhiñe Bizkarguenaga, Arantza Iparraguirre, Luis Ángel Fernández, Olatz Zuloaga, and Ailette Prieto. “Development of Stir-Bar Sorptive Extraction-Thermal Desorption-Gas Chromatography-Mass Spectrometry for the Analysis of Musks in Vegetables and Amended Soils.” Analytica Chimica Acta, 2014.

Alberto de Diego, Aresatz Usobiaga. “Application of the Electrical Conductivity of Concentrated Electrolyte Solutions to Industrial Process Control and Design: From Experimental Measurement towards Prediction through Modelling.” TrAC Trends in Analytical Chemistry, no. 2 (2001): 65–78. doi:10.1016/S0165-9936(00)00081-9.

Amigo, José Manuel, Gorka Arana, Nestor Etxebarria, and Luis Ángel Fernández. “Emerging Needs for Sustained Production of Laboratory Reference Materials.” TrAC Trends in Analytical Chemistry 23, no. 1 (2004): 80–85.

Aparicio, J, L Fernandez, J Coello, and M Muhammed. “EXTRACTION KINETICS OF ZINC BY TRILAURYLAMM0NIUM CHLORIDE AT DIFFERENT CHLORIDE CONCENTRATIONS.” Solvent Extraction and Ion Exchange 6, no. 1 (1988): 39–60.

Arana, G, JM Amigo, N Etxebarria, LA Fernandez, and JC Raposo. “Preparation and Characterization of ‘exhausted Electrowinning Electrolyte’ Reference Material.” Journal de Physique IV (Proceedings) 107 (2003): 53–56.

Arana, G, N Etxebarria, LA Fernandez, and JM Madariaga. “Hydrolysis of Nb (V) and Ta (V) in Aqueous KCl at 25° C. Part II: Construction of a Thermodynamic Model for Ta (V).” Journal of Solution Chemistry 24, no. 6 (1995): 611–22.

ARANA, GORKA, GREGORIO BORGE, NÉSTOR ETXEBARRIA, and LUIS ANGEL FERNÁNDEZ. “Permeation of Mixtures of Four Phenols through a Supported Liquid Membrane in NaCl 1.0 Mol· Dm- 3 Medium.” Separation Science and Technology 34, no. 4 (1999): 665–81.

Arana, Gorka, Nestor Etxebarria, and Luis A Fernández. “Potentiometric Study of the Distribution Equilibria of Phenols between 1.0 Moldm- 3 NaCl and Organic Solvents at 25° C.” Microchimica Acta 117, no. 1–2 (1994): 31–38.

Arana, Gorka, Nestor Etxebarria, and Luis Angel Fernández. “Potentiometric Determination of the Protonation Constants of Some Phenols in 1.0 mol/L NaCl at 25° C.” Fresenius’ Journal of Analytical Chemistry 349, no. 10–11 (1994): 703–7.

Bartolomé, L, E Cortazar, JC Raposo, A Usobiaga, O Zuloaga, N Etxebarria, and LA Fernández. “Simultaneous Microwave-Assisted Extraction of Polycyclic Aromatic Hydrocarbons, Polychlorinated Biphenyls, Phthalate Esters and Nonylphenols in Sediments.” Journal of Chromatography A 1068, no. 2 (2005): 229–36.

Belaustegi, Y, N Etxebarria, MA Olazabal, LA Fernandez, and JM Madariaga. “Interactions of Metal Extractant Reagents. IX. Aggregation and Mixed Species Equilibria of Tri-N-Dodecylammonium Chloride and Nitrate in Toluene at 40° C.” Journal of Solution Chemistry 25, no. 11 (1996): 1113–24.

Belaustegi, Y, N Etxebarria, MA Olazabal, LA Fernández, and JM Madariaga. “Interactions of Metal Extractant Reagents: VII. Aggregation of Tri-N-Dodecylammonium Chloride and Perchlorate in Toluene at 40° C.” Journal of Solution Chemistry 23, no. 5 (1994): 605–18.

Belaustegi, Y, MA Olazabal, LA Fernández, and JM Madariaga. “Interactions of Metal Extractant Reagents. V: The Aggregation of Tri-N-Dodecylammonium Hydrogenchromate and Hydrogensulphate Dissolved in Toluene at 40° C.” Journal of Solution Chemistry 22, no. 7 (1993): 641–50.

Berrueta, L. A., L. A. Fernández, and F. Vicente. “FLUORIM: A Computer Program for the Automated Data Collection and Treatment Using Commercial Spectrofluorimeters.” Computers & Chemistry 15 (1991): 307–12.

Berrueta, LA, LA Fernandez, and F Vicente. “Fluorescence Study of the Solubilization of Benzo [< I> A</i>] Pyrene: Application to Its Detection in Coal Washing Waters.” Analytica Chimica Acta 243 (1991): 115–19.

Bizkarguenaga, Ekhiñe, Arantza Iparragirre, Itsaso Zabaleta, Asier Vallejo, Luis Angel Fernández, Ailette Prieto, and Olatz Zuloaga. “Focused Ultrasound Assisted Extraction for the Determination of PBDEs in Vegetables and Amended Soil.” Talanta 119 (2014): 53–59.

Castro, K, M Olivares, I Martinez-Arkarazo, LA Fernandez, O Zuloaga, and A Usobiaga. “INFORMATICS FOR CHEMISTS: BASIC INFORMATIC TOOLS AT THE GRADE IN CHEMISTRY.” EDULEARN10 Proceedings, 2010, 5706–13.

Castro, K, M Perez-Alonso, MD Rodriguez-Laso, LA Fernandez, and JM Madariaga. “On-Line FT-Raman and Dispersive Raman Spectra Database of Artists’ Materials (e-VISART Database).” Analytical and Bioanalytical Chemistry 382, no. 2 (2005): 248–58.

Castro, K, M Pérez, M^a D Rodríguez, LA Férnandez, and JM Madariaga. “MIXED OR SUPERIMPOSED PIGMENTS?. AN FT-RAMAN APPROACH,” n.d.

Castro, Kepa, Luis A Fernández, M^a Dolores Rodríguez Laso, and Juan M Madariaga. Análisis de Los Pigmentos Presentes En Una Muestra de Papeles Pintados de Mediados Del S. XIX Mediante FT-Raman. Fotónica y Arte XXI, Barcelona, 2001.

Cazallas, R, LA Fernandez, and A De Diego. “Automated Conductometry: Robotic Station for Analytical Titractions.” Analytica Chimica Acta 317, no. 1 (1995): 127–36.

Cazallas, R., L. A. Fernandez, N. Etxebarria, and Madariaga J. M. “Automated System for Multiple Potentiometric and Spectrophotometric Titrations.” Laboratory Robotics and Automation 5 (1993): 161–69.

Citores, M. J., R. M. Alonso, and L. A. Fernández. “Voltammetric Study of the Oxine-Based Extractant Kelex 100.” Electroanalysis 4 (1992): 733–36.

Citores, MJ, RM Alonso, and LA Fernandez. “A Program for the Graphical Evaluation of P< I> K</i>< Sub> A</sub> Values from Spectrophotometric Data.” TrAC Trends in Analytical Chemistry 11, no. 9 (1992): 310–14.

———. “A Study of the Purification and Acid-Base Behavior of the Commercial Extractants KELEX 100 and LIX 26.” Separation Science and Technology 29, no. 11 (1994): 1441–59.

Cortazar, E, L Bartolomé, A Delgado, N Etxebarria, LA Fernández, A Usobiaga, and O Zuloaga. “Optimisation of Microwave-Assisted Extraction for the Determination of Nonylphenols and Phthalate Esters in Sediment Samples and Comparison with Pressurised Solvent Extraction.” Analytica Chimica Acta 534, no. 2 (2005): 247–54.

Cortazar, E, A Usobiaga, Luis A Fernández, A De Diego, and Juan M Madariaga. “Automation of a Procedure to Find the Polynomial Which Best Fits (< I> κ</i>,< I> C</i>< Sub> 1</sub>,< I> C</i>< Sub> 2</sub>,< I> T</i>) Data of Electrolyte Solutions by Non-Linear Regression Analysis Using Mathematica® Software.” Computers & Chemistry 26, no. 3 (2002): 253–64.

Cortazar, E, O Zuloaga, J Sanz, JC Raposo, N Etxebarria, and LA Fernandez. “MultiSimplex Optimisation of the Solid-Phase Microextraction–gas Chromatographic–mass Spectrometric Determination of Polycyclic Aromatic Hydrocarbons, Polychlorinated Biphenyls and Phthalates from Water Samples.” Journal of Chromatography A 978, no. 1 (2002): 165–75.

de Diego, A, R Cazallas, N Etxebarria, JM Madariaga, and LA Fernández. “‘ Elektrodorik Gabeko Eroankortasuna’: Polarizazio-Prozesuak Galarazten Dituen Teknika,” n.d.

Diego, A. De, R. Cazallas, N. Etxebarria, and L. A. Fernández J. M. Madariaga. “Automatic System Based on ‘Electrodeless Conductivity’ Technique.” Química Analítica, n.d., 36–41.

Elizalde, MP, JM Castresana, LA Fernandez, and ME Astigarraga. “On the Extraction with Long-Chain amines—XXXVII. The Extraction of Lead (II) by Trilaurylamine and Trilaurylammonium, Tri-< I> N</i>-Octylammonium and Tri-< I> N</i>-Hexylammonium Chlorides Dissolved in Benzene.” Polyhedron 6, no. 3 (1987): 563–69.

Errekatxo, A, A Prieto, O Zuloaga, A Usobiaga, N Etxebarria, and LA Fernández. “Simultaneous Extraction of Several Persistent Organic Pollutants in Sediment Using Focused Ultrasonic Solid-Liquid Extraction.” Analytical and Bioanalytical Chemistry 392, no. 7–8 (2008): 1471–78.

Etxebarria, N, and LA Fernández. “CROMATOGRAFÍA DE GASES,” 2006.

———. “CROMATOGRAFÍA LÍQUIDA,” 2006.

———. “ESTANDARIZACIÓN Y CALIBRACIÓN ANALÍTICAS,” 2006.

Etxebarria, N, P Navarro, A Prieto, M Olivares, A Usobiaga, LA Fernández, and Olatz Zuloaga. “Extraction Procedures for Organic Pollutants Determination in Water.” In Environmental Chemistry for a Sustainable World, 171–235. Springer, 2012.

Etxebarria, N, MJ Zapatero, JM Castresana, LA Fernández, MA Olazabal, and JM Madariaga. “Determination of the Protonation Constant and Partition Coefficient of 4-Methylpyridine in KNO3-Toluene at 25° C.” Journal of Solution Chemistry 20, no. 12 (1991): 1213–25.

Etxebarria, Nestor, Luis A Fernández, and Juan M Madariaga. “On the Hydrolysis of Niobium (V) and Tantalum (V) in 3 Mol dm–3 KCl at 25° C. Part 1. Construction of a Thermodynamic Model for NbV.” Journal of the Chemical Society, Dalton Transactions, no. 20 (1994): 3055–59.

Fernandez, L, J Aparicio, and M Muhammed. “Coupled Transport of Zinc Using Solid Supported Membranes.” ISEC’86–International Solvent Extraction Conference. Preprints. 1 (1986): 611–18.

———. “Coupled Zinc Transport through a Bis (2-Ethylhexyl) Phosphoric Acid Solid-Supported Liquid Membrane from Aqueous Perchlorate Media.” Journal of Membrane Science 27, no. 1 (1986): 77–91.

Fernandez, L., J. Aparicio, and M. Muhammed. “The Role of Feed Metal Concentration in the Coupled Transport of Zinc through a Bis-(2-Ethylhexyl)phosphoric Acid Solid Supported Liquid Membrane from Aqueous Perchlorate Media.” Separation Science and Technology 22, no. 6 (1987): 1577–95. doi:10.1080/01496398708058419.

Fernandez, Luis Angel. “Studies on the Coupled Transport of Ions across Solid Supported Liquid Membranes.” RIT, Department of Inorganic Chemistry, 1986.

Fernández, Benito, Ma Jesus Arenaza, Luis Angel Fernández, and Ma Angeles Olazabal. “Potentiometric Study of the Acid-Base Equilibrium of Loprazolam at 25° C in 0.1 M NaCl Medium.” Microchimica Acta 122, no. 1–2 (1996): 133–41.

Fernández, L. A., J. Marinsky, and M. Muhammed. Swelling of Ion Exchange Resisns. Stockholm, 1983.

Fernández, LA, MP Elizalde, and JL Aparicio. “Hydrochloric Acid Transport through a Trilaurylamine-Supported Liquid Membrane from Aqueous Lithium Chloride Media.” Journal of Membrane Science 44, no. 2 (1989): 213–32.

G Borge, G. Arana. “Determination of Ion Exchange Equilibrium Constants of Strongly Acidic Resins with Alkaline-Earth Metals by Means of the Potentiometric Titrations Technique.” Talanta 48, no. 1 (1999): 91–102. doi:10.1016/S0039-9140(98)00219-7.

García, Carlos, Gorka Arana, Nestor Etxebarria, and Luis A Fernández. “On-Line Multicomponent Determination of the Flux of Mixtures of Phenols through a Liquid Membrane in Real Time.” Microchimica Acta 136, no. 1–2 (2001): 15–21.

Goienaga, N, JA Carrero, I Arrizabalaga, J Bustamante, LA Fernández, and JM Madariaga. “Analysis of Health and Environmental Risk Assessment of an Abandoned Zn-Pb Mine Through the Weathering Processes of the Local Minerals.” LPI Contributions 1616 (2011): 35.

Gregorio Borge, Nestor Etxebarria. “Development of a Modified Bromley&#39;s Methodology (MBM) for the Estimation of Ionic Media Effects on Solution Equilibria. Part 2. Correlation of the Molar and Molal Interaction Parameters with the Charge and Crystal Radii of the Ions.” Fluid Phase Equilibria 121, no. 1 (1996): 99–109. doi:10.1016/0378-3812(96)03023-3.

I. Martínez-Arkarazo, A. Sarmiento. “Thermodynamic and Raman Spectroscopic Study to Define the Chemical Form of a Slow Release Basic Ion Exchanger.” Solvent Extraction and Ion Exchange 26 (2008): 208–16. doi:10.1080/07366290802053595.

Iparraguirre, Arantza, Patricia Navarro, Ailette Prieto, Rosario Rodil, Maitane Olivares, Luis-Ángel Fernández, and Olatz Zuloaga. “Membrane-Assisted Solvent Extraction Coupled to Large Volume Injection–gas Chromatography–mass Spectrometry for the Determination of a Variety of Endocrine Disrupting Compounds in Environmental Water Samples.” Analytical and Bioanalytical Chemistry 402, no. 9 (2012): 2897–2907.

Iparraguirre, Arantza, Ailette Prieto, Patricia Navarro, Maitane Olivares, Luis-Ángel Fernández, and Olatz Zuloaga. “Optimisation of Stir Bar Sorptive Extraction and in-Tube Derivatisation–thermal Desorption–gas Chromatography–mass Spectrometry for the Determination of Several Endocrine Disruptor Compounds in Environmental Water Samples.” Analytical and Bioanalytical Chemistry 401, no. 1 (2011): 339–52.

K. Castro, M. D. Rodríguez-Laso. “Fourier Transform Raman Spectroscopic Study of Pigments Present in Decorative Wallpapers of the Middle Nineteenth Century from the Santa Isabel Factory (Vitoria, Basque Country, Spain).” Journal of Raman Spectroscopy 33, no. 1 (2001): 17–25. doi:10.1002/jrs.807.

Kepa Castro, Alfredo Sarmiento. “Green Copper Pigments Biodegradation in Cultural Heritage: From Malachite to Moolooite, Thermodynamic Modeling, X-Ray Fluorescence, and Raman Evidence.” Analytical Chemistry 80, no. 11 (2008): 4103–10. doi:10.1021/ac800255w.

Kortazar, L, J Sáez, E Astigarraga, N Goienaga, and L Fernández. “Chemometrics for the Classification and Calibration of Seawater Using the H< Sup>+</sup> Affinity Spectrum.” Talanta 116 (2013): 108–14.

Kortazar, Leire, Janire Saez, Josu Agirre, Jon Kepa Izaguirre, and Luis A Fernandez. “Application of Multivariate Analysis to the Turbidimetric Determination of Sulphate in Seawater.” Analytical Methods, 2014.

L Bartolomé, I. Tueros. “Distribution of Trace Organic Contaminants and Total Mercury in Sediments from the Bilbao and Urdaibai Estuaries (Bay of Biscay).” Marine Pollution Bulletin 52, no. 9 (2006): 1111–17. doi:10.1016/j.marpolbul.2006.05.024.

M. A. Olazabal, M. M. Orive. “SELECTIVE EXTRACTION OF VANADIUM (V) FROM SOLUTIONS CONTAINING MOLYBDENUM (VI) BY AMMONIUM SALTS DISSOLVED IN TOLUENE.” SOLVENT EXTRACTION AND ION EXCHANGE 10 (1992): 623–35. doi:10.1080/07366299208918125.

M. A. Olazabal, N. Etxebarria. “Study of the Complexation and Precipitation Equilibria in the System Cr(VI)-Fe(III)-H2O” 23, no. 10 (1994): 1111–23. doi:10.1007/BF00976260.

Maguregui, M, I Martinez-Arkarazo, M Angulo, K Castro, LA Fernández, and JM Madariaga. “Portable Spectroscopic Analysis of Nitrates Affecting to Cultural Heritage Materials.” Lasers in the Conservation of Artworks,(M. Castillejo, P. Moreno, M. Oujja, R. Radvan and J. Ruiz Eds.), 2008, 177–82.

N Goienaga, N. Arrieta. “Micro-Raman Spectroscopic Identification of Natural Mineral Phases and Their Weathering Products inside an Abandoned Zinc/lead Mine.” Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 80, no. 1 (2011): 66–74. doi:10.1016/j.saa.2011.01.032.

Naiara Goienaga, Alfredo Sarmiento. “Emerging Application of a Structural and Chemical Analyzer for the Complete Characterization of Metal-Rich Particulate Matter.” Analytical Chemistry, 2013. doi:10.1021/ac400878y.

O Zuloaga, N. Etxebarria. “Optimization and Comparison of MAE, ASE and Soxhlet Extraction for the Determination of HCH Isomers in Soil Samples.” Fresenius&#39; Journal of Analytical Chemistry 367, no. 8 (2000): 733–37. doi:10.1007/s002160000459.

OIazabal, MA, LA Fernandez, and JM Madariaga. “The Separation of Aluminum from an Alkaline Solution Containing Molybdenum and Vanadium by Extraction with Lix 26 Dissolved in N-Octanol/hexane Mixtures.” Solvent Extraction and Ion Exchange 9, no. 5 (1991): 735–48.

Olatz Zuloaga, Nestor Etxebarria. “MultiSimplex Optimisation and Comparison of Different Purge-and-Trap Extractions of Volatile Organic Compounds in Soil Samples.” Analytica Chimica Acta - ANAL CHIM ACTA 416, no. 1 (2000): 43–53. doi:10.1016/S0003-2670(00)00871-0.

———. “Optimisation and Comparison of Microwave-Assisted Extraction and Soxhlet Extraction for the Determination of Polychlorinated Biphenyls in Soil Samples Using an Experimental Design Approach.” Talanta, no. 2 (1999): 345–57. doi:10.1016/S0039-9140(99)00028-4.

Orive, MM, MA Olazabal, LA Fernandez, and JM Madariaga. “THE RECOVERY OF COBALT AND NICKEL FROM ACIDIC SULPHATE SOLUTIONS IN THE PRESENCE OF ALUMINUM.” Solvent Extraction and Ion Exchange 10, no. 5 (1992): 787–97.

Prieto, A, O Basauri, R Rodil, A Usobiaga, LA Fernández, N Etxebarria, and O Zuloaga. “Stir-Bar Sorptive Extraction: A View on Method Optimisation, Novel Applications, Limitations and Potential Solutions.” Journal of Chromatography A 1217, no. 16 (2010): 2642–66.

Prieto, A, O Telleria, N Etxebarria, LA Fernández, A Usobiaga, and O Zuloaga. “Simultaneous Preconcentration of a Wide Variety of Organic Pollutants in Water Samples: Comparison of Stir Bar Sorptive Extraction and Membrane-Assisted Solvent Extraction.” Journal of Chromatography A 1214, no. 1 (2008): 1–10.

Prieto, A, O Zuloaga, A Usobiaga, L Bartolomé, LA Fernández, N Etxebarria, E Ciprain, and A Alonso. “Levels and Spatial Distribution of Inorganic and Organic Contaminants in Sediments along the Bilbao Estuary.” Marine Pollution Bulletin 56, no. 12 (2008): 2094–99.

Prieto, A, O Zuloaga, A Usobiaga, N Etxebarria, and LA Fernández. “Development of a Stir Bar Sorptive Extraction and Thermal Desorption–gas Chromatography–mass Spectrometry Method for the Simultaneous Determination of Several Persistent Organic Pollutants in Water Samples.” Journal of Chromatography A 1174, no. 1 (2007): 40–49.

———. “Use of Experimental Design in the Optimisation of Stir Bar Sorptive Extraction Followed by Thermal Desorption for the Determination of Brominated Flame Retardants in Water Samples.” Analytical and Bioanalytical Chemistry 390, no. 2 (2008): 739–48.

Prieto, A, O Zuloaga, A Usobiaga, N Etxebarria, LA Fernández, C Marcic, and A De Diego. “Simultaneous Speciation of Methylmercury and Butyltin Species in Environmental Samples by Headspace-Stir Bar Sorptive Extraction–thermal Desorption–gas Chromatography–mass Spectrometry.” Journal of Chromatography A 1185, no. 1 (2008): 130–38.

R Cazallas, M. J. Citores. “SPECA: A Program for the Calculation of Thermodynamic Equilibrium Constants from Spectrophotometric Data.” Talanta 41, no. 10 (1994): 1637–44. doi:10.1016/0039-9140(94)E0089-A.

Rios, Ainoa, Gorka Arana, Nestor Etxebarria, and Luis A Fernández. “Potentiometric Study of the Protonation and Distribution Equilibria of 2-Chlorophenol in NaCl Medium at 25° C. Construction of a Thermodynamic Model.” Talanta 43, no. 1 (1996): 11–20.

Saez, J, L Kortazar, JK Izaguirre, K Castro, I Martinez, and L Fernández. “FROM UNIVARIATE TO MULTIVARIATE CALIBRATION: EXPERIENCES IN THE ANALYTICAL CHEMISTRY LABORATORY COURSES.” INTED2012 Proceedings, 2012, 1546–54.

Sarmiento, A, K Castro, M Angulo, I Martinez-Arkarazo, LA Fernández, JM Madariaga, JM Gonzalez-Cembellín, and M Urrutikoetxea Barrutia. “Characterization and Virtual Reconstruction of Polychromed Alabaster Sculptures.” Lasers in the Conservation of Artworks: Proceedings of the International Conference Lacona VII, Madrid, Spain, 17-21 September 2007, 2008, 441.

Sarmiento, A. “Classification and Identification of Organic Binding Media in Artworks by Means of Fourier Transform Infrared Spectroscopy and Principal Component Analysis.” Analytical and Bioanalytical Chemistry 399, no. 10 (2011): 3601–11. doi:10.1007/s00216-011-4677-0.

Usobiaga, A, JM Madariaga, I Martinez-Arkarazo, MA Olazabal, G Arana, and LA Fernandez. “SELECTION OF CONTROL ITEMS FOR CONTINUOUS ASSESSMENT: VISUALISATION AND RESULT IMPROVEMENT.” INTED2009 Proceedings, 2009, 4177–83.

Vallejo, A, LA Fernández, M Olivares, A Prieto, N Etxebarria, A Usobiaga, and O Zuloaga. “Optimization of Large Volume Injection-Programmable Temperature Vaporization-Gas Chromatography–mass Spectrometry Analysis for the Determination of Estrogenic Compounds in Environmental Samples.” Journal of Chromatography A 1217, no. 52 (2010): 8327–33.

Vallejo, A, M Olivares, LA Fernández, N Etxebarria, S Arrasate, E Anakabe, A Usobiaga, and O Zuloaga. “Optimization of Comprehensive Two Dimensional Gas Chromatography-Flame Ionization Detection–quadrupole Mass Spectrometry for the Separation of Octyl-and Nonylphenol Isomers.” Journal of Chromatography A 1218, no. 20 (2011): 3064–69.

Vallejo, Asier, Aresatz Usobiaga, Irantzu Martinez-Arkarazo, Ailette Prieto, Nestor Etxebarria, Olatz Zuloaga, and Luis A Fernández. “Ultrasonic-Assisted Derivatization of Estrogenic Compounds in a Cup Horn Booster and Determination by GC-MS.” Journal of Separation Science 33, no. 1 (2010): 104–11.

Vallejo, Asier, Aresatz Usobiaga, Maren Ortiz-Zarragoitia, Miren P Cajaraville, Luis A Fernández, and Olatz Zuloaga. “Focused Ultrasound-Assisted Acceleration of Enzymatic Hydrolysis of Alkylphenols and 17β-Oestradiol Glucuronide in Fish Bile.” Analytical and Bioanalytical Chemistry 398, no. 5 (2010): 2307–14.

Villar, A, E Gorritxategi, S Fernandez, D Otaduy, A Arnaiz, JI Ciria, and Luis A Fernandez. “Visible/NIR on-Line Sensor for Marine Engine Oil Condition Monitoring Applying Chemometric Methods.” In SPIE Photonics Europe, 77262F – 77262F. International Society for Optics and Photonics, 2010.

Villar, Alberto, Santiago Fernández, Eneko Gorritxategi, José I Ciria, and Luis A Fernández. “Optimization of the Multivariate Calibration of a Vis–NIR Sensor for the on-Line Monitoring of Marine Diesel Engine Lubricating Oil by Variable Selection Methods.” Chemometrics and Intelligent Laboratory Systems 130 (2014): 68–75.

Villar, Alberto, Eneko Gorritxategi, Estibaliz Aranzabe, Santiago Fernández, Deitze Otaduy, and Luis A Fernández. “Low-Cost Visible–near Infrared Sensor for on-Line Monitoring of Fat and Fatty Acids Content during the Manufacturing Process of the Milk.” Food Chemistry 135, no. 4 (2012): 2756–60.

Villar, Alberto, Eneko Gorritxategi, Deitze Otaduy, Jose I Ciria, and Luis A Fernandez. “Chemometric Methods Applied to the Calibration of a Vis–NIR Sensor for Gas Engine’s Condition Monitoring.” Analytica Chimica Acta 705, no. 1 (2011): 174–81.

Zabaleta, I., E. Bizkarguenaga, A. Iparragirre, P. Navarro, A. Prieto, L. A. Fernández, and O. Zuloaga. “Focused Ultrasound Solid-Liquid Extraction for the Determination of Perfluorinated Compounds in Fish, Vegetables and Amended Soil.” Journal of Chromatography A, 2014.

Zubiaur, J, R Castaño, N Etxebarria, LA Fernandez, and JM Madariaga. “Potentiometric Study of the Protonation and Distribution Equilibria of D-Gluconic-< I> δ</i>-Lactone Acid in Sodium Perchlorate Solutions at 25° C and Construction of a Thermodynamic Model.” Talanta 45, no. 5 (1998): 1007–14.

Zubieta, Olatz Zuloaga, Irantzu Martinez-Arkarazo, Maitane Olivares, Nestor Etxebarria, Gorka Arana, Aresatz Usobiaga, and Luis Angel Fernández. “THE USE OF ‘PERSONAL RESPONSE SYSTEMS’(CLICKERS) FOR TEACHING ANALYTICAL CHEMISTRY.” CIDUI-Llibre D’actes 1, no. 1 (2012).

Zuloaga, O, N Etxebarria, LA Fernandez, and JM Madariaga. “Comparison of Some Different Extraction Techniques for Some Organic Pollutants in Contaminated Soils.” QUIMICA ANALITICA 20, no. 3 (2001): 131–37.

Zuloaga, Olatz, Nestor Etxebarria, Luis A Fernández, and Juan M Madariaga. “Comparison of Accelerated Solvent Extraction with Microwave-Assisted Extraction and Soxhlet for the Extraction of Chlorinated Biphenyls in Soil Samples.” TrAC Trends in Analytical Chemistry 17, no. 10 (1998): 642–47.

———. “Optimization of Focused Microwave-Assisted Extraction of DDT and Derivatives from Soil Samples.” Journal of High Resolution Chromatography 23, no. 12 (2000): 681–87.

Zuloaga, Olatz, Nestor Etxebarria, Luis Angel Fernández, and Juan Manuel Madariaga. “Lurzoruetako Kutsagarri Organikoen Erauzketaren Auzia.” EKAIA Euskal Herriko Unibertsitateko Zientzi Eta Teknologi Aldizkaria, no. 14 (2011).

———. “MultiSimplex Optimisation of Purge-and-Trap Extraction of Phenols in Soil Samples.” Journal of Chromatography A 849, no. 1 (1999): 225–34.

Zuloaga, Olatz, Nestor Etxebarria, Jagoba Zubiaur, Luis Angel Fernández, and Juan Manuel Madariaga. “MultiSimplex Optimisation of Purge-and-Trap Extraction of Volatile Organic Compounds in Soil Samples.” Analyst 125, no. 3 (2000): 477–80.