Author: Yuncong Li
Publisher: CRC Press
ISBN: 1420092677
Category : Science
Languages : en
Pages : 344
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Book Description
As water quality becomes a leading concern for people and ecosystems worldwide, it must be properly assessed in order to protect water resources for current and future generations. Water Quality Concepts, Sampling, and Analyses supplies practical information for planning, conducting, or evaluating water quality monitoring programs. It presents the
Author: Patrick Echlin
Publisher: Springer Science & Business Media
ISBN: 0387857311
Category : Technology & Engineering
Languages : en
Pages : 329
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Book Description
Scanning electr on microscopy (SEM) and x-ray microanalysis can produce magnified images and in situ chemical information from virtually any type of specimen. The two instruments generally operate in a high vacuum and a very dry environment in order to produce the high energy beam of electrons needed for imaging and analysis. With a few notable exceptions, most specimens destined for study in the SEM are poor conductors and composed of beam sensitive light elements containing variable amounts of water. In the SEM, the imaging system depends on the specimen being sufficiently electrically conductive to ensure that the bulk of the incoming electrons go to ground. The formation of the image depends on collecting the different signals that are scattered as a consequence of the high energy beam interacting with the sample. Backscattered electrons and secondary electrons are generated within the primary beam-sample interactive volume and are the two principal signals used to form images. The backscattered electron coefficient ( ? ) increases with increasing atomic number of the specimen, whereas the secondary electron coefficient ( ? ) is relatively insensitive to atomic number. This fundamental diff- ence in the two signals can have an important effect on the way samples may need to be prepared. The analytical system depends on collecting the x-ray photons that are generated within the sample as a consequence of interaction with the same high energy beam of primary electrons used to produce images.
Author: Erico Marlon Moraes Flores
Publisher: Newnes
ISBN: 0444594442
Category : Science
Languages : en
Pages : 415
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Book Description
Microwave-Assisted Sample Preparation for Trace Element Analysis describes the principles, equipment, and applications involved in sample preparation with microwaves for trace element analysis. The book covers well-established applications as well as new trends in this field. Hot topics such as sample preparation for speciation, metabolomics, and halogen determination, as well as the alternatives of sample preparation for special samples (for example, carbon nanotubes, polymers, petroleum products), are also discussed. The use of microwaves in sample preparation has increased in recent decades. Several applications of microwaves for sample preparation can be found in the literature for practically all types of sample matrices, especially for the determination of trace elements by atomic spectrometric techniques, safely and cleanly reducing the time involved in this step. Microwave-assisted sample preparation is not only a tool for research but also for routine analysis laboratories; the state-of-the-art in sample preparation in trace element analysis. This book is the only resource for chemists specifically focused on this topic. - The first book to describe the principles, equipment, and applications in microwave-assisted sample preparation - Written by experts in the field who provide a comprehensive overview of the important concepts - Introduces new alternatives and trends in microwave-assisted techniques
Author: United States. Bureau of Standards
Publisher:
ISBN:
Category : Soda industry
Languages : en
Pages : 8
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Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 970
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Book Description
Author: V.G. Berezkin
Publisher: Elsevier
ISBN: 0080858562
Category : Science
Languages : en
Pages : 225
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Book Description
Air pollution determination is one of the most important fields of gas chromatography application in practice. This book provides a systematic description of the main stages of air pollution determination, ranging from sampling problems to the quantitative estimation of the acquired data. Special attention is paid to the problem of gas, vapor, spray and solid particles extraction from air. The main methods of sampling procedure, namely, container utilization, cryogenic concentration, absorption, adsorption, chemisorption and filter usage, and successive impurities extraction are also handled. Sorption theory and the problems of sorption and desorption efficiency for hazardous impurities being extracted from traps with sorbents are discussed in detail. The practical utilization of different sorbents (silica, activated carbon, polymers etc.) to carry out sampling procedures for 200 main pollutants with known TLV (USSR and USA) is also considered. This highly informative book, reflecting several insufficiently known techniques as well as the experience of both western and Soviet researchers, should be of interest to both beginners and skilled researchers.
Author: Robert N. Carrow
Publisher: CRC Press
ISBN: 1439814759
Category : Science
Languages : en
Pages : 486
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Book Description
The complex issues involved in the management of saline and sodic turfgrass soils are enough to perplex even the most experienced site manager- there is no "silver bullet" amendment, treatment, or grass for salinity management. Best Management Practices for Saline and Sodic Turfgrass Soils: Assessment and Reclamation presents comprehensive scientif
Author: Francis J. Hopcroft
Publisher: CRC Press
ISBN: 1000527115
Category : Technology & Engineering
Languages : en
Pages : 368
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Book Description
Experiment Design for Environmental Engineering provides a wide range of practical environmental engineering laboratory experiments for implementation by students in a university laboratory or by practicing professionals in the field, along with an extensive discussion on how to design an experiment that will provide meaningful and useful data, how to interpret the data generated from an experiment, and how to present those data to an audience of other students or professionals. The example experiments provide a way to evaluate a new design against an existing experiment to determine what information is most appropriate in each section and how to format the data for the most effective outcome. Features Fills in the gap in ABET requirements to teach students how to design experiments and includes key elements for a successful design Covers experiments for a wide range of environmental engineering topics Provides standardized approach that includes a basic background to the concepts and step-by-step procedure for conducting the experiment Explains designs that are suitable for college laboratory and professional applications Shows how to organize experimental data as it is collected to optimize usefulness Provides templates for design of the experiment and for presenting the resulting data to technical and nontechnical audiences or clients
Author:
Publisher:
ISBN:
Category : Perfumes
Languages : en
Pages : 1042
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Book Description
Author:
Publisher:
ISBN:
Category : Petroleum
Languages : en
Pages : 1160
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Book Description
