J assoc off anal chem

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Cardone, F. Reig and P. To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given.

J assoc off anal chem

For qualitative results objective reliability checks are often not present at all or applicable. Interlaboratory ring testing of methods, as sometimes required, showed often not to be applicable simply because enough adequate laboratories are not available. For instance this situation applied to the large number of methods of unclear reliability status, to be used for residue monitoring of hormonal growth promotors anabolic agents , which are completely banned within the European Communities since January This impasse was circumvented in with the formulation by an international group of analytical experts of a set of quality criteria for common analytical techniques like TLC, GC and HPLC separation , UV, MS and IR spectrometry detection and immunoassays separation and detection. These criteria, now published, are overviewed, as well as the availability of the control and reference materials belonging to them for actual analytical quality control and for validation of laboratories. Although developed for anabolic agents this new approach is applicable in practice for nearly all organic analytes and since very recently also for heavy metals. This approach has clear consequences for the mandatory quality of legislative residue analyses of food stuffs. As based on, amongst others, the combined experience of regulatory residue chemists within the EC, a collection of experimental selectivity indices is presented to rank the required specificity of regulatory residue methods ranging from within laboratory orientation to international forensic purposes in an objective way. Finally an estimate is summarized of the financial consequences of the applicable analytical techniques. This is a preview of subscription content, log in via an institution to check access. Rent this article via DeepDyve. Institutional subscriptions. Google Scholar.

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The acceptance of microwave digestion technique is based on procedures successfully carried out for most different kinds of samples. It is not only the knowledge of the mechanisms how microwaves interact with the material scientists deal with but more the experimental procedures for the most efficiently reagents attack. The goals of this paper are to gather all informations concerning applications of microwave digestion methods for elemental analysis and to review the results obtained by selecting several groups of materials digested. This is a preview of subscription content, log in via an institution to check access. Rent this article via DeepDyve.

Journal of Analytical Chemistry is a peer-reviewed publication focusing on the identification and quantification of chemical substances and the determination of their composition in various samples. Covers new achievements in analytical methods, instruments, and reagents. Reviews advances in sample preparation, separation methods, and sensor development. Reports on progress in nanoanalytics, chemometrics, and analytical data processing. Significant attention is given to issues arising in the analysis of environmental samples and bio-medical species. Welcomes submissions in English from all countries.

J assoc off anal chem

A rapid procedure for determining cellwall constituents of plants consists of the determination of the fiber insoluble in neutral detergent and is applicable to all feedstuffs. The standardization of the method is based on a nutritional concept which defines fiber as insoluble vegetable matter which is indigestible by proteolytic and diastatic enzymes and which cannot be utilized except by microbial fermentation in the digestive tracts of animals. Access to content on Oxford Academic is often provided through institutional subscriptions and purchases. If you are a member of an institution with an active account, you may be able to access content in one of the following ways:. Typically, access is provided across an institutional network to a range of IP addresses. This authentication occurs automatically, and it is not possible to sign out of an IP authenticated account. Choose this option to get remote access when outside your institution. Enter your library card number to sign in.

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Walz, I. Powley, C. Kovalczuk, T. A , 37— Compliance monitoring the Netherlands. Technomic Publishing Company Inc. Anyone you share the following link with will be able to read this content:. Patil, S. Access this article Log in via an institution. Rent this article via DeepDyve. Sorry, a shareable link is not currently available for this article. Read more about how to correctly acknowledge RSC content. Sample preparation. The first page of this article is displayed as the abstract.

Anionic, cationic, and nonionic detergents in different buffering media were examined for their capacity to dissolve nitrogenous constituents in forage dry matter, in the interest of preparing fiber of a low nitrogen content. Of the combinations examined, cetyl trimethyl ammonium bromide in strongly acid solution and sodium lauryl sulfate in slightly alkaline solutions appeared most effective.

Email alerts Article activity alert. Show more details. Pocklington and R. Reprints and permissions. A , 37— Received : 17 July If you cannot sign in, please contact your librarian. You can also search for this author in PubMed Google Scholar. Mezcua, M. If you are a member of an institution with an active account, you may be able to access content in one of the following ways:.