In analytical chemistry, sample preparation refers to the ways in which a sample is treated prior to its analysis. Preparation is a very important step in most analytical techniques, because the techniques are often not responsive to the analyte in its in-situ form, or the results are distorted by interfering species. Sample preparation may involve dissolution, reaction with some chemical species, pulverizing, treatment with a chelating agent (e.g. EDTA), masking, filtering, dilution, sub-sampling or many other techniques. Just as for any other analytical technique, good sample preparation is essential for performing high-quality chemical analysis using X-ray fluorescence (XRF). Whichever samples are being assessed – loose or pressed powders, fused beads, solid samples or liquids – finding the right approach to sample preparation is the first, and one of the most important, steps in achieving accurate and reproducible results. Unlike other analytical techniques, XRF analysis does not require extensive sample preparation work, and the required methods are normally inexpensive, straightforward and easy to learn. Even taking the need for sample preparation into account, XRF spectrometry is still easier and quicker than most other chemical analysis techniques. The book covers theoretical and objects analysed applied aspects of analytical chemistry; it informs the reader of new achievements in analytical methods, and analysts; new instruments; and reagents. It is intended for scientists and specialists at research institutes, universities, and other educational establishments; for students at institutions of higher education; and for analysts working in industry, agriculture, medicine, and environmental services. Devoted entirely to teaching and reinforcing these necessary pretreatment steps, Sample Preparation Techniques in Analytical Chemistry addresses diverse aspects of this important measurement step.
AUTOR: Shankar, Ram
EDITORA: Auris Reference
DISPONIBILIDADE DO PRODUTO: Sob Encomenda - Até 40 dias ( Importação )