ASTM D5997 - 15

    Стандартный метод испытания для непрерывного мониторинга общего содержания углерода, неорганического углерода в воде при помощи ультрафиолетового персульфатного окисления и детекции проводимости мембраны

    Active Standard ASTM D5997 Developed by Subcommittee: D19.03

    Book of Standards Volume: 11.01

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    Significance and Use

    5.1 This test method is useful for detecting and determining organic and inorganic carbon impurities in water from a variety of sources including industrial water, drinking water, and waste water.

    5.2 Measurement of these impurities is of vital importance to the operation of various industries such as power, pharmaceutical, semiconductor, drinking water treatment, and waste treatment. Semiconductor and power applications require measurement of very low organic carbon levels (TOC < 1 μg/L). Applications in pharmaceutical industries range from USP purified water (TOC < 500 μg/L) to cleaning applications (500 μg/L < TOC < 50 000 μg/L). Drinking waters range from <100 μg/L to 25 000 μg/L and higher. Some of these applications may include waters with substantial ionic impurities as well as organic matter.

    5.3 Measurement of inorganic carbon as well as total organic carbon is highly important to some applications, such as in the power industry.

    5.4 Continuous monitoring and observation of trends in these measurements are of interest in indicating the need for equipment adjustment or correction of water purification procedures.

    5.5 Refer to the Bibliography section for additional information regarding the significance of this test method.