12 research outputs found

    Determination of nutrient salts by automatic methods both in seawater and brackish water: the phosphate blank

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    9 páginas, 2 tablas, 2 figurasThe main inconvenience in determining nutrients in seawater by automatic methods is simply solved: the preparation of a suitable blank which corrects the effect of the refractive index change on the recorded signal. Two procedures are proposed, one physical (a simple equation to estimate the effect) and the other chemical (removal of the dissolved phosphorus with ferric hydroxide).Support for this work came from CICYT (MAR88-0245 project) and Conselleria de Pesca de la Xunta de GaliciaPeer reviewe

    Thiophenes in Organotransition Metal Chemistry: Patterns of Reactivity

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    Transition-metal mediated heteroatom removal by reactions of FeL+ [L=O, C4H6, c-C5H6, c-C5H5, C6H6, C5H4(=CH2)] with furan, thiophene, and pyrrole in the gas phase

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