Complexation Thermodynamics of Cyclodextrins.

The globalisation of food markets and the relative ease with which food commodities are transported through and between countries and continents, means that consumers are increasingly concerned about the origin of the foods they eat. A growing number of research articles have been published in the last 5 years detailing the use of natural abundance isotope variation and elemental concentrations as geographic ‘tracers’ to determine the provenance of food. These investigations exploit the systematic global variations of stable hydrogen and oxygen isotope ratios in combination with elemental concentrations, including heavy isotope variations (e.g. strontium-87) and other biogeochemical indicators. This article reviews the developments in the application of multi-isotopic and multi-element methods in the emerging field of ‘Food Forensics’.

Tracing the geographical origin of food: The application of multi-element and multi-isotope analysis

https://uhra.herts.ac.uk/bitstream/handle/2299/2030/901263.pdf;sequence=1

Platinum group elements in the environment and their health risk.

How botulinum and tetanus neurotoxins block neurotransmitter release.

Sampling and Data Treatment Methods Sampling Methods in Surface Waters, Munro Mortimer, Jochen F. Muller, and Matthias Liess Methods of Treatment of Data, Riccardo Leardi Radioanalytical Analysis Radioanalytical Methodology for Water Analysis, Jorge S. Alvarado Organoleptical Analysis Organoleptical Methodology, Abdul Moheman, Md. Musawwer Khan, and K. S. Siddiqi Analysis of Biological Parameters Bacteriological Analysis of Water, Paulinus Chigbu and Salina Parveen Marine Toxins Analysis, Luis M. Botana, A. Alfonso, M. R. Vieytes, N. Vilarino, A. M. Botana, C. Louzao, and C. Vale Algal Analysis, Leonardo Rubi Rorig Halogens, N-Compounds, and Phosphates Halogens, Geza Nagy and Livia Nagy Analysis of Sulfur Compounds in Water, Leo M. L. Nollet Determination of Ammonia in Water Samples, Juliana Antunes Galvao, Alexandre Matthiensen, Marilia Oetterer, Y. Moliner-Martinez, R. A. Gonzalez-Fuenzalida, M. Munoz-Ortuno, R. Herraez-Hernandez, J. Verdu-Andres, C. Molins-Legua, and P. Campins Falco Nitrites and Nitrates, Adnan Aydin Phosphates in Aquatic Systems, Alexandre Matthiensen, Juliana Antunes Galvao, and Marilia Oetterer Cyanides, Asbestos, Metals, and Si-Compounds Cyanides, Leo M. L. Nollet Asbestos in Water, James S. Webber Heavy Metals, Major Metals, Trace Elements, Jorge E. Marcovecchio, Sandra E. Botte, Claudia E. Domini, and Ruben H. Freije Determination of Silicon and Silicates, Salah M. Sultan Organic Parameters Main Parameters and Assays Involved with the Organic Pollution of Water, Lorena Vidal, Claudia E. Domini, and Antonio Canals Determination of Organic Nitrogen in the Aquatic Environment, Juliana Antunes Galvao, Alexandre Matthiensen, and Marilia Oetterer Determination of Urea in Aquatic Samples, Juliana Antunes Galvao, Alexandre Matthiensen, and Marilia Oetterer Organic Acids, Mercedes Gallego Fernandez, Evaristo Ballesteros Tribaldo, and Beatriz Jurado Sanchez Determination of Volatile Organic Compounds in Water, Ivan P. Roman Falco and Marta Nogueroles Moya Phenolic and Humic Compounds Determination of Phenolic Compounds in Water, Leo M. L. Nollet Characterization of Humic Matter, Leo M. L. Nollet Residues of Pesticides Determination of Pesticides in Water, Evaristo Ballesteros Tribaldo Analysis of Herbicide and Fungicide Residues in Waters, N. Sridhara Chary, Maria Jose Gomez Ramos, and Amadeo R. Fernandez-Alba Residues of PCBs, PCDDs, PCDFS, and PAHs Analysis of PCBs in Waters, L. Bartolome, O. Zuloaga, and N. Etxebarria PCDDs and PCDFs, Luigi Turrio-Baldassarri, Paola Pettine, and Laura Achene Polynuclear Aromatic Hydrocarbons, Chimezie Anyakora Surfactants and Petroleum Hydrocarbon Analysis Surfactants, Eva Pocurull and Rosa Maria Marce Petroleum Hydrocarbon Analysis, Ivan P. Roman Falco EDCs and Residues of Plastics Endocrine-Disrupting Chemicals, Pharmaceuticals, and Personal Care Products, Dimitra A. Lambropoulou and Eleni Evgenidou Residues of Plastics, Dimitra A. Lambropoulou and Eleni Evgenidou Index

Handbook of Water Analysis

Using instrumental neutron activation analysis (INAA), graphite furnace atomic absorption spectrometry (GFAAS), flame atomic absorption spectrometry (FAAS) and combustion elemental analysis, green coffees of the Arabica species produced in crop year 1987/88 in Colombia, Costa Rica, Cuba, El Salvador, Mexico, Nicaragua, Panama and Papua New Guinea were analysed for the elements Ba, Br, C, Ca, Co, Cr, Cu, Cs, Fe, H, K, La, Mg, Mn, N, Na, Rb, Sc, Sr and Zn. In accordance with the concentrations determined, the elements could be ranked into five groups: Sc (sub-ppb level); Br, Co, Cr, Cs and La (ppb level); Ba, Cu, Fe, Mn, Na, Rb, Sr and Zn (ppm level); Ca and Mg (%o level); and C, H, K and N (% level). On the basis of the results obtained, an attempt was made to establish the origin of the green coffee via its elemental composition. Among the investigated elements, manganese was found to be best suited as an indicator for this purpose. However, the elements C, Co, Cs, Na and Rb proved to be of interest too.

Multielement analysis of green coffee and its possible use for the determination of origin

An improved graphite furnace electrothermal vaporization device equipped with an autosampler for inductively coupled plasma atomic emission spectrometry is presented. The transport losses of eight selected analytes in the individual segments of the device were determined by means of the radiotracer technique by applying amounts traced comparable to those to be determined in real samples. The results obtained from the radiotracer study were the basis for further improvement of the interface design, leading to considerable increase of the total transport efficiency, which finally was found to be between 26 (for Cr) and 57% (for Ga). The whole system consists of a graphite furnace vaporizer, a power supply, a gas flow box, and an autosampler with incorporated microbalance. The temperature program, gas flows, and autosampler functions are controlled by a data station which also provides the data acquisition and processing of the transient signals. The performance parameters of the developed system were evalua...

A graphite furnace electrothermal vaporization system for inductively coupled plasma atomic emission spectrometry.

A direct method of analysis of powdered silicon carbide for the determination of Al, Cd, Cr, Cu, Fe, Mg, Mn, Ni, Ti, V and Zn based on electrothermal atomic absorption spectrometry (ETAAS) using the slurry sampling technique is described. Possible spectral interferences caused by the refractory matrix components were studied. The technique was optimized with regard to sample preparation, dispensing, thermal pre-treatment and atomization parameters. The accuracy was checked by comparison of the results with those obtained by ETAAS and inductively coupled plasma atomic emission spectrometry involving decomposition of the sample, and by instrumental neutron activation analysis. For most of the elements investigated the achievable limits of detection are at the sub-microgram per gram level.

Direct determination of impurities in powdered silicon carbide by electrothermal atomic absorption spectrometry using the slurry sampling technique

Determination of platinum in enviromental and geological samples by radiochemical neutron activation analysis

The radiotracer technique was used to find out the sources of systematic errors of a hydride generation AAS procedure for the determination of selenium in wastewater and other environmental samples. The investigated procedure involves sample decomposition with a mixture of sulfuric acid and hydrogen peroxide, and reduction of Se(VI) to Se(IV) by boiling with 5 M hydrochloric acid. Satisfactory recoveries are obtained in the decomposition (99.7 +/- 2%), reduction 98 +/- 1%), and hydration (95 +/- 3%) steps. Serious errors can be introduced via the time-dependent back oxidation of Se(IV) to Se(VI) by the residual chlorine produced in the reduction step. Removal of the chlorine from the solution is necessary if the hydration does not follow the reduction step immediately. 10 references, 2 figures, 2 tables.

Radiotracer error-diagnostic investigation of selenium determination by hydride-generation atomic absorption spectrometry involving treatment with hydrogen peroxide and hydrochloric acid

Viliam Krivan

Papers

Multielement analysis of green coffee and its possible use for the determination of origin

A graphite furnace electrothermal vaporization system for inductively coupled plasma atomic emission spectrometry.

Direct determination of impurities in powdered silicon carbide by electrothermal atomic absorption spectrometry using the slurry sampling technique

Determination of platinum in enviromental and geological samples by radiochemical neutron activation analysis

Radiotracer error-diagnostic investigation of selenium determination by hydride-generation atomic absorption spectrometry involving treatment with hydrogen peroxide and hydrochloric acid