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The science seeks ever improved means of measuring the chemical composition of
natural and artificial materials by using techniques to identify the substances which may
be present in a material and to determine the exact amounts of the identified substance.Examples are spectrophotometry (ultraviolet, visible, or infrared), fluorimetry, atomic spectroscopy (absorption, emission), mass spectrometry, nuclear magnetic
resonance spectrometry (NMR), X-ray spectroscopy (absorption, fluorescence).This analysis can be divided into three branches:
1- Volumetric analysis (Titrimetric analysis): The analyte reacts with a measured volume
of reagent of known concentration, in a process called titration. 2- Gravimetric analysis: usually involves the selective separation of the analyte by
precipitation, followed by the very non-selective measurement of mass (of the
precipitate).
The science seeks ever improved means of measuring the chemical composition of
natural and artificial materials by using techniques to identify the substances which may
be present in a material and to determine the exact amounts of the identified substance. Analytical chemistry involves the analysis of matter to determine its composition and the
quantity of each kind of matter that is present. Analytical chemists detect traces of toxic chemicals in water and air. They also develop
methods to analyze human body fluids for drugs, poisons, and levels of medication. Analytical chemistry consists of:
(A) Qualitative analysis which deals with the identification of elements, ions, or
compounds present in a sample (tells us what chemicals are present in a sample). (B) Quantitative analysis which is dealing with the determination of how much of one or
more constituents is present (tells how much amounts of chemicals are present in a
sample). This analysis can be divided into three branches:
1- Volumetric analysis (Titrimetric analysis): The analyte reacts with a measured volume
of reagent of known concentration, in a process called titration. 2- Gravimetric analysis: usually involves the selective separation of the analyte by
precipitation, followed by the very non-selective measurement of mass (of the
precipitate). 3- Instrumental analysis: They are based on the measurement of a physical property of
the sample, for example, an electrical property or the absorption of electromagnetic
radiation. Examples are spectrophotometry (ultraviolet, visible, or infrared), fluorimetry, atomic spectroscopy (absorption, emission), mass spectrometry, nuclear magnetic
resonance spectrometry (NMR), X-ray spectroscopy (absorption, fluorescence).
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