rsc publishing jan 2003 (9 risultati)

Taschenbuch. Condizione: Neu. Neuware - This guide explains the best methods for undertaking the measurementof mass, one of the most frequent operations in the analyticallaboratory. It is a technique required when obtaining a knownquantity of a sample for analysis; for preparation of analyticalreagents; and for preparation of calibration standards, etc.After an initial discussion of the units of mass and otherterminology, the guide goes on to look at the types of balance andtheir features, followed by coverage of location, calibrationaccuracy and use of the balance. Practical exercises are thenprovided.'Measurement of Mass' is one of the 'Practical Laboratory SkillsTraining Guides', a series that aims to make achieving best practiceeasy. These invaluable manuals will enable both experienced andinexperienced staff to get the essential basics of any experimentright simply by following the clear and easy to use instructionsprovided. The guides are written by experienced scientists andinclude minimal theory, plenty of practical exercises in order toassess competence, and trouble shooting information. TOC:Introduction / Mass and Weight / Units of Mass Measurement /Terminology and Concepts Used in Mass Measurement / Types of BalanceUsed in Analytical Laboratories / Location of Balance / BalanceCalibration / Checking the Accuracy of the Balance / Use of theBalance / Uncertainty of Measured Mass Values / Effect of Buoyancy onWeighing / Practical Exercises.

Taschenbuch. Condizione: Neu. Neuware - Whether pH is being used to test a sample against a legal requirementor specification; as part of an analytical method; for monitoring andcontrolling a reaction; as a process control in the chemical industry;or for the environmental monitoring of waste and effluents, it isimportant that all pH measurements are carried out in a logical andconsistent manner, paying careful attention to experimentalprocedures, in order to obtain reliable results. This guide providesscientists with the knowledge of how to do just that, first byoutlining the principles of pH measurement and buffer solutions. pHmeters and electrodes are then discussed, including selection criteriaand the care of electrodes. Finally, sections on making pHmeasurements and uncertainty are followed by a set of practicalexercises.'Measurement of pH' is one of the 'Practical Laboratory SkillsTraining Guides', a series that aims to make achieving best practiceeasy. These invaluable manuals will enable both experienced andinexperienced staff to get the essential basics of any experimentright simply by following the clear and easy to use instructionsprovided. The guides are written by experienced scientists andinclude minimal theory, plenty of practical exercises in order toassess competence, and trouble shooting information. TOC:What is pH / Why is pH measured / Principles Underlying theMeasurement of pH / Buffer Materials with Reference pH Values / pHMeters / pH Electrodes / Care of pH Electrodes / Selection of a pHElectrode for a Particular Application / Making pH Measurements /Uncertainty of pH Measurements Using a Glass Electrode / The Use ofIndicator Papers to Measure pH / Practical Exercises.

Taschenbuch. Condizione: Neu. Neuware - For those new to this technique, this guide provides basic tips, key skills, awareness and guidance on good practice of High Performance Liquid Chromatography (HPLC). It will help build understanding of the important issues to consider during analysis and how to develop further skills. HPLC is one of the most widely used techniques in industry to separate and analyse compounds through the mass transfer of analytes between stationary and mobile phases. This guide will prove an invaluable introduction to the technique. Starting with a look at the basic theory, the guide goes on to describe HPLC components, system parameters, suitability checks and testing. Later sections cover calibration, problem solving and data handling. High Performance Liquid Chromatography is one of the Practical Laboratory Skills Training Guides, a series that aims to make achieving best practice easy. These invaluable manuals will enable both experienced and inexperienced staff to get the essential basics of any experiment right simply by following the clear and easy to use instructions provided. The guides are written by experienced scientists and include minimal theory, plenty of practical exercises in order to assess competence, and trouble shooting information.

Taschenbuch. Condizione: Neu. Neuware - Gas chromatography has been the most widely used technique in analytical chemistry for over three decades. It offers unchallenged resolving power for closely related volatile compounds and high sensitivity and selectivity with many of the detector systems. This technique is very accurate and precise when used in the laboratory. This guide begins by looking at the basic theory behind gas chromatography, then goes on to examine injection and sampling methods and the chromatographic column. Sections on detection, data handling, calibration and standards are followed by problem-solving and practical exercises. Gas Chromatography is one of the Practical Laboratory Skills Training Guides, a series that aims to make achieving best practice easy. These invaluable manuals will enable both experienced and inexperienced staff to get the essential basics of any experiment right simply by following the clear and easy to use instructions provided. The guides are written by experienced scientists and include minimal theory, plenty of practical exercises in order to assess competence, and trouble shooting information. Other titles are: Measurement of Mass; Measurement of Volume; Measurement of pH; and High Performance Liquid Chromatography.

Taschenbuch. Condizione: Neu. Neuware - In recent years, the use of illegal substances has increasedparticularly 'designer' drugs which have rapidly become part of youthculture. The need for all involved in drug control to have up-to-dateinformation about the subject has never been greater. This book helpsmeet this need by providing a chemical background to the legalcontrols on drugs of abuse. Although focussed on the UK, some of theprovisions of the Misuse of Drugs Act derive from internationaltreaties; the discussion of technical aspects is therefore of widerrelevance. Apart from the Act itself, the book also deals withcertain aspects of the Misuse of Drugs Regulations.There is detailed coverage of 'designer drugs' and the genericlegislation that was introduced to tackle them. The more recentaddition of 35 'Ecstasy'-like substances is covered in depth. Thesignificance to the legislation of terms such as salt, basestereoisomer, ester, ether, derivative, homologue and isotope aredescribed, and the text is supplemented by 23 Tables and over 80chemical structures. There are eleven Appendices covering topics suchas precursor chemicals, related legislation, stated cases, sentencingguidelines and the chemical characteristics of commonly-abused drugs.Up-to-date lists of controlled drugs, with cross references to theirstatus in UN treaties, are provided and a number of pending and otherpossible changes to the Act are included together with a guide tonomenclature and synonyms.Although primarily aimed at forensic scientists, this book willbe of great benefit to all bodies concerned with drug controlincluding the police, customs officers, lawyers and governmentdepartments. TOC:Introduction / Schedule 2 to the Act / Generic Controls /Miscellaneous / Generic Controls: Substance-specific / GenericControls: Group-specific / Nomenclature / 'Designer' Drugs /Miscellaneous Issues / Future Developments / Bibliography / SubjectIndex / Appendices.

Buch. Condizione: Neu. Neuware - Glow discharge optical emission spectroscopy (GDOES) is an essential technique for the direct analysis of bulk solids, for elemental surface analysis and for the depth profiling of thin films and industrial coatings. The technique has shown rapid growth in numbers of instruments, in breadth of applications, in improved quantification in recent years and is now a recognised technique within the ISO, with two international standards. Glow Discharge Optical Emission Spectroscopy: A Practical Guide takes the reader on a journey through instrument operation, sample preparation, analysis, and reporting results. It follows two sets of samples through the whole process of analysis, brass samples for bulk analysis, and zinc-coated steel for depth profiling. Procedures are consistent with ISO standards and each step is loaded with hands-on tips and theoretical insight. The book also includes unique data tables on spectral interferences, molecular bands, self-absorption and relative sputtering rates.This book is designed for those using or managing GDOES instruments and for students interested in learning the technique from a hands-on perspective. It is also an invaluable aid to those considering the purchase of a GDOES instrument, or those using GDOES results, to understand in detail how the technique works and what is involved in maintaining the instrument and achieving high quality results. TOC:Preparation and Maintenance of Instrument; Samples: Selection, Preparation; Optimisation of Source and Analytical Parameters; Calibration; Calibration for Bulk Analysis; Calibration for Compositional Depth Profiling; Drift Correction; Bulk Analysis; Qualitative Depth Profiling; Compositional Depth Profiling; Theory; Line Selection; Trouble Shooting; Subject Index.

Buch. Condizione: Neu. Neuware - Hyphenated Techniques in Speciation Analysis offers a brief but comprehensive overview of hyphenated techniques and their various applications for the determination of chemical forms of trace elements. It brings a succinct presentation of the concept of speciation analysis, gives an overview of techniques based on coupling of chromatography with element and molecule specific detection and summarises their applications in the fields of environmental and industrial chemistry, biochemistry, nutrition, toxicology and medicine.Fully referenced, Hyphenated Techniques in Speciation Analysis is an invaluable introduction to elemental speciation analysis and also provides a practising analyst with a critical overview of research carried out in the field. TOC:PART I. Principles and fundamentals; The concept of speciation analysis and hyphenated techniques; Element specific detection in chromatography; Gas chromatography with ICP MS detection; Liquid chromatography with ICP MS detection; Electrophoretic techniques with element selective detection; Electrospray mass spectrometry in elemental speciation analysis; Quality control and assurance in speciation analysis; PART II. Applications; Multielement analysis for organometallic species in the environment; Speciation of organotin compounds; Speciation of organolead compounds; Speciation of organomercury compounds; Metal speciation in petroleum-related samples; Speciation of redox states; Speciation of organoarsenic compounds in biological materials; Speciation of organoselenium compounds in biological materials; Speciation of metal-complexes in microorganisms, plants and food of plant origin; Speciation of metal complexes with metallothioneins; Speciation of metal-complexes in human body fluids and tissues; Metal speciation in pharmacology: metallodrugs; Subject index.

Taschenbuch. Condizione: Neu. Neuware - Practical Laboratory Skills Training Guides aim to make achieving best practice easy. These invaluable manuals will enable both experienced and inexperienced staff to get the essential basics of any experiment right simply by following the clear and easy to use instructions provided. The guides are written by experienced scientists and include minimal theory, plenty of practical exercises in order to assess competence, and trouble shooting information. Available for purchase separately or as a complete set, Practical Laboratory Skills Training Guides include the following titles: Measurement of Mass; Measurement of Volume; Measurement of pH; High Performance Liquid Chromatography; and Gas Chromatography. The measurement guides look at the principles and terminology of each technique and the choice of equipment. This is followed by a step-by-step guide and some practical exercises. The chromatography guides begin by looking at the basic theory of the technique, then the system and its components. Sections on calibration and problem solving are included. These guides are intended for laboratory technicians in industry, students at university or anyone needing a clear, concise and reliable guide to analytical procedures. A package consisting of the training guides and a CD-ROM, Practical Laboratory Skills, is also available. Contact Sales and Customer Care for details.

Buch. Condizione: Neu. Neuware - This book offers extensive coverage of the most important aspects of UVR effects on all aquatic ecosystems, encompassing UV physics, chemistry, biology and ecology.