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Successfully reported this slideshow. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime. S 4- Class 1-Introduction to analytical chemistry. Upcoming SlideShare. Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Next SlideShares. Download Now Download to read offline and view in fullscreen.
Download Now Download Download to read offline. Sajjad Ullah Follow. Assistant Professor. Gravimetric method of analysis.
Sampling in analytical chemistry sajjad ullah. UV visible spectroscopy principles and instrumentation. Higher Education and Research in Brazil. Mendeley Desktop Reference Manager.
Karl Fischer Titration KF titration. Related Books Free with a 30 day trial from Scribd. Dry: A Memoir Augusten Burroughs. Related Audiobooks Free with a 30 day trial from Scribd. Empath Up! Mahesh Magdum. Gul Dasht. Anchal Tyagi. Ahsan Km. Zeeshan Sarwar. Azhin Salah. Khaleel Pasha. Show More. Views Total views. Actions Shares. An analysis provides chemical or physical information about a sample. The component in the sample of interest to us is called the analyte , and the remainder of the sample is the matrix.
In an analysis we determine the identity, the concentration, or the properties of an analyte. This is the most important stage in qualitative and quantitative analysis, and requires experience and, above all, intuition.
Of vital importance are:. Analytical chemistry falls into the category of scientific methods and so is considered a proper science. This is why is has to satisfy the requirements of reproducibility and universality, making it possible for anyone who wants to check the results to do so.
Precision : the result is repeatable if the experiment is carried out repeatedly. It depends on random errors and is represented by standard deviation.
Accuracy : concordance between the result obtained and the real value. It depends on random error as well as system errors. A high level of accuracy and precision requires large amounts of time and money. This is why the chosen method is often a compromise between accuracy and cost. Analytical Chemistry. The analytical chemistry laboratory. Safety in the laboratory.
Inorganic qualitative analysis. Semiquantitative analysis. Gravimetric analysis. Volumetric analysis. Neutralisation titration. Neutralisation titration - part two. Precipitation titration. Mohr method. Vohlard method. Complexometric titration. Oxidation reduction titration.
Iodometry and Iodimetry. Instrumental Chemical Analysis. Optical methods of analysis. Solid-liquid extraction. Treatment of experimental data. Federica EU. The central role of Analytical Chemistry. These few examples help us realise what a central role Analytical Chemistry plays.
Some of the most frequently-encountered terms in analytical chemistry are: sample : the object of the analytical procedure for example: a blood sample ; analyte : the substance that is of interest in the analysis for example: amount of hemoglobin in blood ; matrix : the constituents, apart from the analyte, of the given sample for example: all the constituents of blood except hemoglobin ; method : the procedure used for the analysis, which may be standard or non-official; qualitative analysis : reveals the presence and chemical identity of the analyte in a sample; quantitative analysis : establishes, in numerical terms, the quantity of one or more analytes in a sample; revealability limit : the minimum quantity of analyte that can be determined through analysis; sensibility : the appreciable variation in quantity of analyte depending on the technique used for analysis.
Analytical chemistry cont. Analytical Chemistry: a practical, laboratory-based course The aim of this course is to help students develop the mindset of the chemiscal analyst and to provide them with the basic knowledge for solving probblems relating to Analytical Chemisty, mainly in the food industry. Analytical chemistry and food technology One of the main aims of food legislation is to make sure human life and health are protected.
The main points of this system are: identifying every hazard and making sure they are prevented, eliminated or reduced to acceptable levels; identifying the chemical control points during the stages where control is essential for preventing or eliminating a risk or for reducing it to acceptable levels; setting critical control points, the critical limits for differentiating between acceptability and inacceptability for the prevention, elimination or reduction of identified risks; application of efficient surveillance procedures at critical control points; choosing and implementing corrective course of action when surveillance reveals that a critical point is out of control.
This is how analytical chemistry fits in to the food industry.
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