» 1980-1990

* Iodimetric determination of Copper (II) in the presence of Polyvinylpirrolidone.
» Analyst, 107, 787-792 (1982).

* Spectrophotometric determination of aluminum with Alizarin Red S sensitized with polyvinylpirrolidone.
» Analytica Chimica Acta, 149, 379-383 (1983).

* Spectrophotometric determination of zirconium with Alizarin Red in the presence of Polyvinylpirrolidone.
» Analytica Chimica Acta, 175, 345-348 (1985).

* Third derivative spectrophotometric determination of molybdenum with Bromopyrogalol Red in the presence of Polyvinylpirrolidone.
» Analyst, 112, 1507-1510 (1987).

* Spectrophotometric determination of Ti(IV) with catechol violet sensitized with polyvinylpirrolidone.
» Microchemical Journal, 35, 288-292 (1987).

* Determination of neodymium with 1-(2-Pyridylazo)-2-naphthol in micelles of Triton X-100 by derivative spectrophotometry.
» Inorganica Chimica Acta, 140, 245-247 (1987).

* Simultaneous spectrophotometric determination of erbium and praseodymium with 1-(2-Pyridylazo)-2-naphthol in the presence of
octylphenol polyetylenglycol ether (TX-100).
» Talanta, 35, 293-296 (1988).

* Determination of neodymium with 1-(2-Pyridylazo)-naphthol by high order derivative spectrophotometry. Application to the determination of neodymium in glasses.
Analyst, 113, 429-431 (1988).

* Organized surfactant assemblies in flow injection analysis.
» Química Analítica, 8,231-240 (1989).

* Micellar systems in flow injection analysis for the determination of neodymium in glasses.
» Analyst, 114, 849-851 (1989).

* Application of a nested-loop system for the simultaneous determination of thorium and uranium by flow injection analysis.
» Analytical Chemistry, 61, 1789-1791 (1989).

* Reversed injector loading technique for simultaneous determinations by flow injection analysis.
» Analytical Chemistry, 62, 2405-2408 (1990).

* Determination of uranium using a flow system with reagent injection. Application to the determination of uranium in ores leachates.
» Analytica Chimica Acta, 230, 217-220 (1990).

* Detection of slightly soluble systems by means of organized media in flow injection analysis.
» Analytica Chimica Acta, 234, 239-245 (1990).