By John Kenkel
Surpassing its bestselling predecessors, this completely up-to-date 3rd version is designed to be a strong education instrument for entry-level chemistry technicians. Analytical Chemistry for Technicians, 3rd variation explains analytical chemistry and instrumental research ideas and the way to use them within the genuine international. a special characteristic of this version is that it brings the place of work of the chemical technician into the school room. With over 50 office scene sidebars, it deals tales and pictures of technicians and chemists operating with the apparatus or acting the suggestions mentioned within the textual content. It contains a supplemental CD that reinforces education actions. the writer contains wisdom won from a few American Chemical Society and PITTCON brief classes and from own visits to numerous laboratories at significant chemical vegetation, the place he decided firsthand what's very important within the sleek analytical laboratory. The ebook comprises greater than sixty experiments particularly proper to the laboratory technician, besides a Questions and difficulties part in every one bankruptcy. Analytical Chemistry for Technicians, 3rd version maintains to provide the nuts and bolts of analytical chemistry whereas concentrating on the sensible points of educating.
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Additional info for Analytical Chemistry for Technicians, Third Edition (Analytical Chemistry for Technicians)
If you repeat a given measurement over and over and these measurements deviate only slightly from one another, within the limits of the number of significant figures obtainable, then we say that the data are precise, or that the results exhibit a high degree of precision. The mean of such data may or may not represent the real value of that parameter. In other words, it may not be accurate. Accuracy refers to the correctness of a measurement, or how close it comes to the correct value of a parameter.
0% HCl (about 12 M). Hydrochloric acid solutions are used especially for dissolving metals, metal oxides, and carbonates not ordinarily dissolved by water. Examples are iron and zinc metals, iron oxide ore, and the metal carbonates of which the scales in boilers and humidifiers are composed. Being a strong acid, it is very toxic and must be handled with care. It is stored in a blue color-coded container. Sulfuric acid. An acid that is considered a stronger acid than HCl in many respects is sulfuric acid, H2SO4.
If variances in the sampling and lab work are both insignificant, these results may be valid. However, due to possible large variances in both the sampling and the lab work, such a result cannot be considered reliable. In Chapter 1, we indicated that the correct procedure is to perform the analysis many times and deal with the variances with statistics. fm Page 20 Monday, November 3, 2003 11:29 AM 20 Analytical Chemistry for Technicians The fact that sampling introduces a second statistics problem means that we must consider taking a large number of samples and deal with the results with statistics just as we perform a laboratory analysis several times and deal with those results with statistics.
Analytical Chemistry for Technicians, Third Edition (Analytical Chemistry for Technicians) by John Kenkel