[en] This report presents the work carried out during my internship in the Environment Laboratory of Galicia (LMAG), in the Air Quality and Water Quality departments. In the Air Quality department, I have been able to participate in all the areas of work. Starting from field work, watching how the particulate material is collected, to the laboratory where I collaborated in several analyses (PM10 fraction, PM2.5 fraction, PAHs and metals). I was also able to collaborate in office work at the final stages of the process, performing data processing and some reports required by the European Union (Intercomparation of automatic equipment of PM10 report with gravimetric report, metals and polycyclic aromatic hydrocarbons report). In the Water Quality department, I have collaborated in lab work performing several analyses to measure the required parameters of water (chlorine by a colorimetric method, hardness by a complexometric method with EDTA, nitrites and nitrates by a colorimetric method, cations and anions by ionic chromatography, metals by ICP-MS, rainwater metals by ICP-AES, volatile and semivolatile by GC-MS, mercury by atomic fluorescence spectrometry,…) and field sampling (collecting rainwater). In addition, solid samples (sludge, sediments, soils,…) are occasionally received these usually have a different pre-treatment even though, after preparation, analysis is carried out using the same techniques .as in the water analysis determination. I have been able to work in 29 procedures determining more than 50 parameters. This procedures differ from each other, from simple physicochemical techniques (pH, hardness, chlorine,…) to more complex techniques that require equipment such as HPLC, gas chromatograph or mass spectrometer. I was allowed to work with different matrices (atmospheric particulate, water. soils, sludges,…), learning the specific aspects that differentiate their analysis and the distinctive features that apply when it comes to working with each one of them. Another function learned was to calibrate and verify different equipments and laboratory material as well as various tasks which must be performed in the lab on a daily basis. I have also learnt to solve some problems that can frequently arise in the laboratory.

[gl] Nesta memoria presentase o traballo levado a cabo durante as prácticas realizadas no Laboratorio de Medio Ambiente de Galicia (LMAG), nos departamentos de Calidade do aire e Calidade do auga. No departamento de calidade do aire, puiden participar en tódolos ámbitos de traballo. Dende os traballos de campo, observando como realizar as recollidas do material particulado, pasando polo laboratorio onde participei na realización dos diferentes análises (fracción PM10, fracción PM2.5, HAPs e metais), e a etapa final de traballo de oficina, co tratamento de datos e a realización de diferentes informes que esixe a unión europea (Informe de intercomparación do equipo automático de PM10 co método gravimétrico, informe de metais e informe de hidrocarburos aromáticos policíclicos). No departamento de calidade da auga, colaborei no traballo de laboratorio realizando os diferentes análise necesarios en augas (Cloro por un método colorimétrico, dureza por un método complexométrico con AEDT, nitritos e nitratos por un método colorimétrico, catións e anións por cromatografía iónica, metais por ICP-MS, metais en augas de chuvia por ICP-AES, volátiles e semivolátiles por CG-MS, mercurio por espectrometría de fluorescencia atómica,…), e saídas de mostraxe (recollida de auga de chuvia). Ademais en algunhas ocasións reciben mostras sólidas (lodos, sedimentos, solos,…), estas solen ter un pretratamento diferente a pesar de que una vez acondicionadas o análise realícese utilizando as mesmas técnicas que nas determinacións de análise de augas. Puiden traballar en 29 procedementos diferentes determinando mais de 50 parámetros. Estes procedementos son moi variados entre sí, atopando dende sinxelas técnicas físico-químicas (pH, dureza, cloro,…) ata técnicas mais complexas que inclúen a necesidade de equipos como HPLC, cromatografo de gases ou espectrómetro de masas. Permitíuseme traballar con diferentes matrices (particulado atmosférico, auga, solos, lodos,…), aprendendo os diferentes aspectos que diferencian os seus análises e as diferenzas que existen a hora de traballar con cada unha delas. Outra das función aprendidas foi calibrar e verificar diferentes equipos e material de laboratorio, así como diversas tarefas que deben realizarse no día a día do laboratorio. Aprendín tamén a solucionar algúns problemas que poden xurdir con frecuencia no laboratorio.