Arthur E. Martell

Bio: Arthur E. Martell is an academic researcher from Texas A&M University. The author has contributed to research in topics: Ligand & Stability constants of complexes. The author has an hindex of 68, co-authored 558 publications receiving 31284 citations. Previous affiliations of Arthur E. Martell include Dow Chemical Company & University of California, Berkeley.

Critical Stability Constants

Abstract: Aminocarboxylic Acids.- Iminodiacetic Acid Derivatives.- Peptides.- Anilinecarboxylic Acids.- Pyrrolecarboxylic Acid.- Pyrazlinecarboxylic Acid.- Pyridinecarboxylic Acids.- Aliphatic Amines.- Azoles.- Azines.- Aminophosphonic Acids.- Carboxylic Acids.- Phosphorus Acids.- Phenols.- Carbonyl Ligands.- Alcohols.- Polyethers.- Thioethers.- Thiols.- Phosphines.- Hydroxamic Acids.- Oximes.- Amides.- Inorganic Ligands.- Protonation Values for other Ligands.- Ligands Considered But Not Included.- Erratum to: Aminocarboxylic Acids.- Erratum to: Iminodiacetic Acid Derivatives.- Erratum to: Peptides.- Erratum to: Aliphatic Amines.- Erratum to: Azoles.- Erratum to: Azines.- Erratum to: Carboxylic Acids.- Erratum to: Phosphorus Acids.- Erratum to: Phenols.- Erratum to: Carbonyl Ligands.- Erratum to: Alcohols.- Erratum to: Polyethers.- Erratum to: Thioethers.- Erratum to: Hydroxamic Acids.- Erratum to: Oximes.- Erratum to: Amides.- Erratum to: Inorganic Ligands.- Erratum to: Protonation Values for other Ligands.- Erratum to: Bibliography.

Determination and Use of Stability Constants

Abstract: Part 1 Introduction: stability constants - early work recent developments historical evolution of computational methods purpose of this book. Part 2 Equilibrium constants, protonation constants, formation constants: concentration constants and activity constants conventions employment for expressing equilibrium constants equilibrium constants and stability constants for EDTA species distribution curves. Part 3 Experimental methods for measuring equilibrium constants: methods available potentiometric pH measurements displacement methods pH and p[H]measurement of metal complex equilibria: materials, the reaction mixture calibration of the potentiometric apparatus the experimental runs computation of stability constants.Part 4 Common errors and their elimination or minimization: measurements errors calibration and electrode care reagents equilibrium measurements calculations selection of the model. Part 5 Examples of stability constant determination: iminodiacetic acid (IDA) procedure for IDA C-BISTREN procedure for C-BISTREN. Part 6 Macroscopic and microscopic constants: some definitions and concepts ionization of tyrosine microscopic protonation equilibria of DOPA general comments and conclusions. Determination of stability constants and species concentrations of complex systems: a mixed-ligand binuclear dioxygen system non-aqueous solvents complex multicomponent systems equilibrium with solid phases equilibrium involving hydrolytic species species distributions of hydroxo and fluoro complexes of AI(III). Part 7 Critical stability constants and their selection: general criteria examples of critical data selection need for additional critical constants. Part 8 Development of a complete metal complex data base: introduction linear stability. constant correlations estimation of estability constants not measured experimentally metal speciation in sea water with and without added ligands.

Sequential extraction procedure for the speciation of particulate trace metals

Abstract: An analytical procedure involving sequential chemicai extractions has been developed for the partitioning of particulate trace metals (Cd, Co, Cu, Ni, Pb, Zn, Fe, and Mn) into five fractions: exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter, and residual. Experimental results obtained on replicate samples of fluvial bottom sediments demonstrate that the relative standard deviation of the sequential extraction procedure Is generally better than =10%. The accuracy, evaluated by comparing total trace metal concentrations with the sum of the five Individual fractions, proved to be satisfactory. Complementary measurements were performed on the Individual leachates, and on the residual sediments following each extraction, to evaluate the selectivity of the various reagents toward specific geochemical phases. An application of the proposed method to river sediments is described, and the resulting trace metal speciation is discussed.

Study and Interpretation of the Chemical Characteristics of Natural Water

Abstract: The chemical composition of natural water is derived from many different sources of solutes, including gases and aerosols from the atmosphere, weathering and erosion of rocks and soil, solution or precipitation reactions occurring below the land surface, and cultural effects resulting from human activities. Broad interrelationships among these processes and their effects can be discerned by application of principles of chemical thermodynamics. Some of the processes of solution or precipitation of minerals can be closely evaluated by means of principles of chemical equilibrium, including the law of mass action and the Nernst equation. Other processes are irreversible and require consideration of reaction mechanisms and rates. The chemical composition of the crustal rocks of the Earth and the composition of the ocean and the atmosphere are significant in evaluating sources of solutes in natural freshwater. The ways in which solutes are taken up or precipitated and the amounts present in solution are influenced by many environmental factors, especially climate, structure and position of rock strata, and biochemical effects associated with life cycles of plants and animals, both microscopic and macroscopic. Taken together and in application with the further influence of the general circulation of all water in the hydrologic cycle, the chemical principles and environmental factors form a basis for the developing science of natural-water chemistry. Fundamental data used in the determination of water quality are obtained by the chemical analysis of water samples in the laboratory or onsite sensing of chemical properties in the field. Sampling is complicated by changes in the composition of moving water and by the effects of particulate suspended material. Some constituents are unstable and require onsite determination or sample preservation. Most of the constituents determined are reported in gravimetric units, usually milligrams per liter or milliequivalents