STN - Slovak standards

Pure chemicals and extra pure substances. Determination of small amounts of chemical elements by atomic absorption spectrometry

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Pure chemicals. Method for determination of carbonates impurities content

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Pure chemicals. Paper chromatography. Common instructions for testing

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Pure chemicals. Thin-layer chromatography. Common instructions for testing

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Extra pure substances. Determination of content of substances reducing potassium permanganate

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Extra pure substances. Concentration of impurities by evaporation method

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Extra pure compounds. Determination of content of chemical elements admixture in liquid compounds by the method of atomic emission spectroscopy

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Extra pure substances. Concentration of microadmixtures by extractive method

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Extra pure substances. Concentration of microadmixtures by ion-exchange method

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Extra pure substances. Concentration of microadmixtures by coagulative and coprecipitative methods

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