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    • Organic nitrogen compounds
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    ISO 2749 : 1973

    UREA FOR INDUSTRIAL USE - MEASUREMENT OF THE PH OF A SOLUTION OF UREA OF CONVENTIONAL CONCENTRATION (100G/L) - POTENTIOMETRIC METHOD

    International Organization for Standardization

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    ISO 2754 : 1973

    UREA FOR INDUSTRIAL USE - DETERMINATION OF BIURET CONTENT - PHOTOMETRIC METHOD

    International Organization for Standardization

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    ASTM D 5297 : 1995 : R2014

    Standard Test Methods for Rubber Chemical Accelerator—Purity by High Performance Liquid Chromatography

    American Society for Testing and Materials

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    ASTM D 4877 : 2014

    Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates

    American Society for Testing and Materials

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    ASTM D 4877 : 2014 : REDLINE

    Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates

    American Society for Testing and Materials

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    ASTM E 258 : 2007 : R2015

    Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method (Withdrawn 2019)

    American Society for Testing and Materials

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    SAC GB/T 23961 : 2009

    DETERMINATION OF LOW CARBON ALIPHATIC AMINES - GAS CHROMATOGRAPHIC METHOD

    Standardization Administration of China

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    ASTM D 2074 : 2007 : R2013

    Standard Test Methods for Total, Primary, Secondary, and Tertiary Amine Values of Fatty Amines by Alternative Indicator Method

    American Society for Testing and Materials

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    ASTM D 5315 : 2004 : R2011

    Standard Test Method for Determination of N-Methyl-Carbamoyloximes and N-Methylcarbamates in Water by Direct Aqueous Injection HPLC with Post-Column Derivatization

    American Society for Testing and Materials

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    ASTM E 579 : 1984 : R1998

    Standard Test Method for Limit of Detection of Fluorescence of Quinine Sulfate

    American Society for Testing and Materials

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