![]() ![]() There are two main methods for atomizing a sample: This is done by exposing the sample to high temperatures in the flame. The fuel atomizer separates the particles of the sample into individual molecules and breaks these molecules into atoms. This helps create a fine aerosol spray, which is then mixed with a fuel and introduced to a flame. The nebulizer is used to ‘suck up’ the liquid samples – this must be done at a controlled rate. These cathodes are then sealed in a glass tube which is filled with an inert gas, such as neon or argon. The anode is tungsten and the cathode is hollow and cylindrical in shape. This is usually done through a concentration curve using standards to the known concentration.įor the light source, hollow cathode lamps are the most commonly used. The concentration can then be determined from the amount of absorption. The atoms absorb ultraviolet or visible light and thus transition to higher electronic energy levels. AAS simply quantifies the absorption of ground state atoms in this state. This technique builds on this knowledge and uses free atoms in a gaseous state that are generated in an atomizer. The atoms of each element absorb a specific frequency of radiation, unique to that element. Pharmaceuticals – it is used to find out the amount of catalyst present in the final product on a manufacturing process.Environmental analysis – it can be used to detect the levels of certain elements in rivers, drinking water, air, petrol, and even drinks. ![]() Clinical analysis – it is used to analyse the metal found in biological fluids, such as urine and blood.It is incredibly sensitive and can even detect down to micrograms (μg). The concentration of an element in a sample can be calculated using a calibration curveĪtomic absorption spectroscopy (usually referred to as AAS) is an analytical technique used to measure the concentrations of elements in a sample.It is based on the principle that the atoms of each element absorb a specific and unique frequency of radiation.AAS is used to measure the concentrations of elements in a sample. ![]()
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