Russian standards PDF
Fertilizers. Determination of the water-soluble potassium content
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Fertilizers. Spectrophotometric determination of biuret in urea
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Ethanol as a petrol component. Determination of inorganic chlorides by potentiometric titration
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Fertilizers. Determination of urease inhibitor N-(n-butyl)thiophosphoric triamide using high-perfomance liquid chromatography
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Fertilizers. Determination of the 3-methylpyrazole by high-performance liquid chromatography method
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Fertilizers. Extraction of soluble phosphorus according to Petermann at 65 °C
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