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  • G64 高純試劑、高純物質 標準查詢與下載



    共找到 10 條與 高純試劑、高純物質 相關的標準,共 1

    本標準規定了高純試劑試驗方法中實驗用水與試劑、器具與容器、器具與容器的清洗及保存、試驗環境、樣品溶液及標準溶液的配制和通用方法。本標準適用于高純有機試劑和高純無機試劑(不包括純度大于99.99%的高純無機單質)試驗方法的制(修)定。

    General rule for test methods of highly purified reagents

    ICS
    71.040.30
    CCS
    G64
    發布
    2013-12-31
    實施
    2014-08-01

    本標準規定了高純氫氧化鈉中硫酸鹽的離子色譜檢測方法。 本標準適用于高純氫氧化鈉中硫酸鹽的測定。

    ICS
    71.040.30
    CCS
    G64
    發布
    2015-07-08
    實施
    2016-01-01

    Biomethane

    ICS
    75.060
    CCS
    G64
    發布
    2015-06-30
    實施

    Biomethane

    ICS
    75.060
    CCS
    G64
    發布
    2015-06-30
    實施

    Cation conductivity provides one of the most sensitive and dependable on-line means of detecting anionic contamination in the boiler/steam cycle, such as chlorides, sulfates, nitrates, bicarbonates, and organic acids, such as formic and acetic. High sensitivity is provided by intentionally eliminating the pH adjusting treatment chemical(s), for example, ammonia and amines, from the sample and converting remaining salt contaminants into their acid forms which are approximately three times as conductive. Guidelines on cation conductivity limits for various cycle chemistry and boiler types have been established by EPRI (2-4) and by ASME (5,6). The sample effluent from the cation exchange column also may be used, and in some cases is preferred, for ion chromatography or other anion measurements.1.1 This practice describes continuous sample conditioning by hydrogen ion exchange and measurement by electrolytic conductivity. It is commonly known as cation conductivity measurement in the power industry although it is actually an indication of anion contamination in high purity water samples. Measurements are typically in a range less than 1 x03BC;S/cm. 1.2 The actual conductivity measurements are made using Test Method D5391. 1.3 This practice does not provide for separate determination of dissolved carbon dioxide. Refer to Test Methods D2186 and D4519. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    Standard Practice for On-Line Determination of Cation Conductivity in High Purity Water

    ICS
    13.060.60 (Examination of water for physical prope
    CCS
    G64
    發布
    2011
    實施

    Cation conductivity provides one of the most sensitive and dependable on-line means of detecting anionic contamination in the boiler/steam cycle, such as chlorides, sulfates, nitrates, bicarbonates, and organic acids, such as formic and acetic. High sensitivity is provided by intentionally eliminating the pH adjusting treatment chemical(s), for example, ammonia and amines, from the sample and converting remaining salt contaminants into their acid forms which are approximately three times as conductive. Guidelines on cation conductivity limits for various cycle chemistry and boiler types have been established by EPRI (2-4) and by ASME (5,6). The sample effluent from the cation exchange column also may be used, and in some cases is preferred, for ion chromatography or other anion measurements.1.1 This practice describes continuous sample conditioning by hydrogen ion exchange and measurement by electrolytic conductivity. It is commonly known as cation conductivity measurement in the power industry although it is actually an indication of anion contamination in high purity water samples. Measurements are typically in a range less than 1 S/cm.1.2 The actual conductivity measurements are made using Test Method D 5391.1.3 This practice does not provide for separate determination of dissolved carbon dioxide. Refer to Test Methods D 2186 and D 4519.This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    Standard Practice for On-Line Determination of Cation Conductivity in High Purity Water

    ICS
    13.060.60 (Examination of water for physical prope
    CCS
    G64
    發布
    2007
    實施

    Free halogens will react with any residual moisture in a solvent to form acid. These acids can cause corrosion to process and storage equipment used for halogenated solvents. The presence of free halogens in halogenated solvents is often an indication that the stabilizers in the solvent system are breaking down. This test method provides a means of detecting the presence of free halogens in halogenated solvents and their admixtures. 1.1 This test method covers the evaluation of free halogens in halogenated organic solvents and their admixtures. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    Standard Test Method for Free Halogens in Halogenated Organic Solvents and Their Admixtures

    ICS
    71.080.20 (Halogenated hydrocarbons)
    CCS
    G64
    發布
    1995
    實施

    本標準規定了聚氨酯預聚體或中間產物中異氰酸酯基(NCO)含量的測定方法。 本標準適用予聚氨酯預聚體或中間產物中異氰酸酯基含量的測定。 本標準試樣中二異氰酸酯有一定的毒性(如2,4甲苯二舁氰酸酯的允許濃度TLV為O.02 ppm,為避免吸入其蒸汽,防止皮膚與其直接接觸,分析過程需要在良好的通風下進行。

    ICS
    71.040.30
    CCS
    G64
    發布
    1992-10-22
    實施
    1993-07-01

    この規格は,高純度試薬の試験に関する共通事項について規定する。ただし,この規格と個別規格との間に相違がある場合には,個別規格によるものとする。

    General rule for test methods of highly purified reagents

    ICS
    71.040.30
    CCS
    G64
    發布
    1992-08-01
    實施

    Information processing; Magnetic disk for data storage devices; 160 000 flux transitions per track, 356 mm (14 in) outer diameter

    ICS
    35.220.20
    CCS
    G64
    發布
    1984-12
    實施



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