Author
Walter A. Aue
Other affiliations: University of Missouri
Bio: Walter A. Aue is an academic researcher from Dalhousie University. The author has contributed to research in topics: Gas chromatography & Electron capture detector. The author has an hindex of 23, co-authored 160 publications receiving 2172 citations. Previous affiliations of Walter A. Aue include University of Missouri.
Papers published on a yearly basis
Papers
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TL;DR: Carbowax 20M was coated on Chromosorb W, heat-treated at 280°, and exhaustively extracted as mentioned in this paper, with the remaining support performed chromatographically in a manner similar to highly efficient, well deactivated gas.
169 citations
TL;DR: Silicones can be synthesized from a variety of pure or mixed monomers on and chemically bonded to silicicic surfaces as discussed by the authors, typically to chromatographic supports The resulting materials are non-extractable, thermally stable coatings which perform well in GLC and can be used for some of the more demanding types of analysis
121 citations
TL;DR: In this article, a modified Shimadzu flame photometric detector operating without wavelength discrimination was developed for detecting the presence of organotins in the environment, which is a future public concern and, consequently, pose problems for trace analyst.
56 citations
TL;DR: An epidemic of congenital limb deformities in swine occurred among 79 Duroc sows and gilts on a farm in Howard County, Missouri, during the period September 11, 1967, to March 3, 1968, and nicotine, other alkaloids or components of the tobacco stalks appeared to be the most likely cause.
50 citations
TL;DR: Citric and nitrilotriacetic acids can be determined at the 1–10,000 p.p.b. 1 levels in aqueous systems ranging from tap water to sewage effluents by use of anion-exchange clean-up, derivatization with butanol—HCl and gas chromatography.
47 citations
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TL;DR: The aquatic ecotoxicology of organotins is reviewed based on a multidisciplinary approach involving environmental chemical, toxicological, and ecological aspects, and the influence of speciation for bioavailability, basic modes of toxic action, and aquatic toxicity are discussed.
Abstract: Organotin compounds are ubiquitous contaminants in the environment. The high biological activity of some compounds toward aquatic organisms lead to deleterious impacts in aquatic ecosystems. Here, the aquatic ecotoxicology of organotins is reviewed based on a multidisciplinary approach involving environmental chemical, toxicological, and ecological aspects. Basic results were obtained both with field and laboratory studies, and some of the most important recent results and conclusions are critically reviewed. The contamination of and fate in aquatic systems is reported and linked with effects at different levels of biological organization. Major emphasis is placed on the development of a concept of ecotoxicology that encompasses not only effect assessment alone, but also integrates environmental chemistry with aquatic toxicology. Thereby, the influence of speciation for bioavailability, basic modes of toxic action, and aquatic toxicity are discussed. This case study on organotins allows to a certain extent generalizations to ecotoxicology in general.
955 citations
TL;DR: The study indicated that electrostatic interactions play an important role in the adsorption of dyes onto diatomite and a model of the advertisersorption mechanism of methylene blue onto di Atomite is proposed.
609 citations
01 Sep 2012
TL;DR: A Toxicological Profile for Manganese, Draft for Public Comment was released in September 2008 and supersedes any previously released draft or final profile, and reflects ATSDR's assessment of all relevant toxicologic testing and information that has been peer-reviewed.
Abstract: This public health statement tells you about manganese and the effects of exposure to it.The Environmental Protection Agency (EPA) identifies the most serious hazardous waste sites in the nation. These sites are then placed on the National Priorities List (NPL) and are targeted for long-term federal clean-up activities. Manganese has been found in at least 869 of the 1,699 current or former NPL sites. Although the total number of NPL sites evaluated for this substance is not known, the possibility exists that the number of sites at which manganese is found may increase in the future as more sites are evaluated. This information is important because these sites may be sources of exposure and exposure to this substance may harm you.When a substance is released either from a large area, such as an industrial plant, or from a container, such as a drum or bottle, it enters the environment. Such a release does not always lead to exposure. You can be exposed to a substance only when you come in contact with it. You may be exposed by breathing, eating, or drinking the substance, or by skin contact.If you are exposed to manganese, many factors will determine whether you will be harmed. These factors include the dose (how much), the duration (how long), and how you come in contact with it. You must also consider any other chemicals you are exposed to and your age, sex, diet, family traits, lifestyle, and state of health.
399 citations
TL;DR: The use of ultrasonication to remove dissolved air while pulling a vaccumm on the sample solution prior to hydrolysis assured a good recovery for methionine and cystine as discussed by the authors.
365 citations
TL;DR: In this paper, a review of light-scattering techniques, including their theory, practice and real-world use in determination of nanoparticles in environmental and food applications is presented.
Abstract: Nanoparticles (NPs), due to their unique physical and chemical properties, especially their minute particle size (⩽100 nm), find applications in numerous industrial, commercial and consumer products. After their end-user applications, these NPs find their way into the environment and food products. The NPs so discharged need to be quantified accurately to determine their toxicity and exposure levels. At this time, there is a need to develop a unified method for their determination. There are plenty of techniques available in the market that were initially used for colloidal particles (e.g., microscopy, spectroscopy and the recent addition of magnetic resonance), but each of these techniques has a certain degree of uncertainty. Further, sample homogeneity, sample preparation, instrument-operating procedures, and statistical practices are likely to add to the complexity of the problem. In this context, this review attempts to understand the widely-used light-scattering techniques, including their theory, practice and real-world use in determination of NPs in environmental and food applications.
340 citations