【国外标准】 Standard Test Method for Determination of Fluoride and Glycol Degradation Products in Engine Coolants by Ion Chromatography

5.1 This test method is for the quantitative determination of fluoride and glycol degradation products in engine coolants. By this method, analysis can be performed directly without pretreatment, other than dilution, as required by the linear ranges of the equipment. Table 1 indicates applicable analytes and approximate detection limits.(A) Sample diluted 1/10 with reagent water, suppressed conductivity detection, IonPac AS20 column with AG20 guard column. Other systems will require MQL determinations using chosen dilution factors, eluents, columns, and detector.1.1 This test method covers the determination of fluoride in engine coolants by ion chromatography. Several glycol degradation products (different carboxylates including, but not limited to, formate and glycolate) can be determined by this test method.1.2 This test method applies to both new and used engine coolants.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.