Reference materials for chemical analysis [[electronic resource] ] : certification, availability, and proper usage / / edited by Markus Stoeppler, Wayne R. Wolf, Peter J. Jenks

• Record Nr.: UNINA9910143969503321
• Pubbl/distr/stampa: Weinheim ; ; New York, : Wiley-VCH, c2001
• ISBN: 1-281-76405-1; 9786611764050; 3-527-61304-8; 3-527-61305-6
• Descrizione fisica: 1 online resource (325 p.)
• Altri autori (Persone): StoepplerM <1927-> (Markus); WolfWayne R. <1943->; JenksPeter J
• Disciplina: 016.543; 543/.00218
• Soggetti: Chemistry, Analytic - Quality control; Materials - Standards; Electronic books.
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Reference Materials for Chemical Analysis; Foreword; Contents; Preface; 1 Introduction; 1.1 Historical; 1.1.1 Early Developments; 1.1.2 Growth and Maturity; 1.1.3 Milestones and The Future; 1.2 The Theoretical Basis; 1.3 Technical Requirements; 1.4 References; 2 From Planning to Production; 2.1 Material Collection and Preparation; 2.1.1 Introduction; 2.1.2 General Collection and Preparation Principles; 2.1.3 Specific Examples; 2.1.4 Concluding Remarks and Recommendations; 2.2 Control of Material Properties; 2.2.1 Particle Size and Particle Size Distribution; 2.2.2 Homogeneity/Heterogeneity; 2.2.3 Humidity (Water Content)2.2.4 Degradation Studies/Shelf Life; 2.3 References; 3 Certification; 3.1 Certification Philosophy of RM Producers; 3.1.1 Introduction; 3.1.2 Approaches to the Characterization/Certification of Reference Materials; 3.1.2.1 General Principles of Certification; 3.1.2.2 Classification of ; Characterization/Certification Schemes; 3.1.2.3 Specific Examples; 3.1.3 Conclusions; 3.2 Certification of Elements; 3.2.1 Methods Used for the Certification of RMs for Elements; 3.2.2 Multi-Method Elemental RM Certification; 3.2.2.1 River Sediment; 3.2.2.2 Lichen; 3.2.2.3 Examples of Selected RMs Certified for Elements3.2.3 Certification of Element Contents by Neutron Activation Analysis; 3.2.3.1 General Features; 3.2.3.2 Internal Cross-Checking (Self-Verification) in NAA; 3.2.3.3 Applications in Certification and Analysis; 3.2.3.4 NAA for the Detection of Errors; 3.2.3.5 Summary; 3.3 Certification of Organometallic and Other Species; 3.3.1 Introduction; 3.3.2 Potential Sources of Error in Speciation Analysis; 3.3.3 Restricted List of Chemical Species for Trace Elements and Their Compounds; 3.3.3.1 Aluminum; 3.3.3.2 Antimony; 3.3.3.3 Arsenic; 3.3.3.4 Bromine3.3.3.5 Chromium; 3.3.3.6 Mercury; 3.3.3.7 Lead; 3.3.3.8 Selenium; 3.3.3.9 Tin; 3.3.3.10 Metallothionein; 3.3.4 Fractionation; 3.3.5 Conclusions; 3.4 Certification of Organic Substances; 3.4.1 Introduction; 3.4.2 CRMs Available for Organic Constituents; 3.4.2.1 Pure Substances; 3.4.2.2 Calibration Solution CRMs; 3.4.2.3 Natural Matrix SRMs; 3.4.3 Certification Approach for Organic Constituents; 3.4.3.1 NISTApproach for Certification; 3.4.3.2 NIST Analytical Approach for the Certification of Organic Constituents in Natural Matrix SRMs; 3.4.3.3 BCR Approach to Certification; 3.5 References4 Particular Developments; 4.1 RMs in Quality Control and Quality Assessment; 4.1.1 Introduction; 4.1.2 Proper Usage; 4.1.3 Characterization of Methods; 4.1.4 Internal Quality Control; 4.1.5 External Quality Assurance; 4.1.5.1 State of the Art; 4.1.5.2 Performance of Individual Laboratories; 4.1.5.3 Supplement Internal Quality Control; 4.1.5.4 To Obtain Consensus Values; 4.1.5.5 Investigate Factors Contributing to Performance; 4.1.5.6 To Act as an Educational Stimulus - To License Laboratories?; 4.1.6 Conclusions; 4.2 Fresh Materials; 4.2.1 Introduction; 4.2.2 Packing Materials; 4.2.3 Preparation
• Sommario/riassunto: There are many academic references describing how RMs are made, but few that explain why they are used, how they should be used and what happens when they are not properly used.In order to fill this gap, the editors have taken the contributions of more than thirty RM practitioners to produce a highly readable text organized in nine chapters. Starting with an introduction to historical, theoretical and technical requirements, the book goes on to examine all aspects of RM production from planning, preparation through analysis to certification, reviews recent development areas, RMs for li

Aproximaciones Al Marxismo Latinoamericano : Teoría, Historia y Política

• Record Nr.: UNINA9910493728603321
• Autore: Cabaluz D J. Fabián
• Pubbl/distr/stampa: Santiago, : Ariadna Ediciones, 2021; Santiago : , : Ariadna Ediciones, , 2021; ©2021
• ISBN: 9791036577550
• Descrizione fisica: 1 online resource (201 p.)
• Collana: Historia
• Altri autori (Persone): Torres LópezTomás; LöwyMichael <1938->
• Soggetti: Political Science; Marxism; politic; thought; Latin American; theory; marxismo; política; reflexión; teoría; Latinoamérica
• Lingua di pubblicazione: Spagnolo
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Sommario/riassunto: “Este libro es una excelente contribution al conocimiento del marxismo latinoamericano, como conjunto de reflexiones teoricas compro-metidas con las clases subalternas y las luchas populares. Los autores discutidos por Fabián Cabaluz y Tomas Torres son muy distintos, por su origen nacional, sus enfoques temáticos, sus orientaciones politicas: René Zavaleta Mercado, Alvaro García Linera, Anfbal Quijano y Enrique Dussel. Con todo, como lo demues- tran estos ensayos, son parte de ; un marxismo latinoamericano heterodoxo, herético, anti dogmático, que intenta crear conceptos y herramientas intelectuales nuevas para entender América Latina - en oposición a un otro tipo de marxismo, que solo busca aplicar los modelos teoricos y politicos formulados por el Comintern, o por la URSS estalinista”