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 (TB'T) Committee. Designation: D6886 -24 INTERNATIONAL Standard Test Method for Determination of the Weight Percent Individual Volatile Organic Compounds in Air-Dry Low voC Coatings by Gas Chromatography1 This standard is issued under the fixed designation D6886; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope NoTe 1Data from this test method will not always provide the volatile 1.1 This test method is for the determination of the weight organic compound content of a paint film equivalent to EPAMethod 24 Some compounds and some semi-volatile compounds may be considered percent of individual volatile organic compounds in low voc volatile using the GC conditions specified but will not fully volatilize air-dry coatings (Note 1). during the one hour at 110 °C conditions of EPA Method 24. Some or all 1.2 This test method may be used for t of these materials remain in the paint film and therefore are not considered the analysis of volatile organic compounds according to EPA Method 24.In addition, coatings containing silanes, siloxanes, and silane-siloxane some compounds may decompose at the high inlet temperature of the GC. blends. However, EPA Method 24 has poor precision and accuracy at low levels of volatile organic compounds. To determine whether Test Method D6886 1.3 This test method is not suitable for the analysis of orEPAMethod24 aresuitableforVOCdetermination,lowVOCis coatings that cure by chemical reaction (this includes two- definedasVOCcontentlessthan15Og/L.ForcoatingswithVOCcontent component coatings and coatings which cure when heated) higher than 150 g/L, EPA Method 24 is preferred. For low VOC coatings because the dilution herein required will impede the chemical (below 150 g/L), Test Method D6886 is more suitable. NoTE 2This test method measures volatile organic compound weight reaction required for these types of coatings. of air-dry coatings directlyas opposed to othermethods in Practice D3960 1.4Precisionstatistics forthis test methodhave been which measure the volatile organic compound weight percent indirectly.A determined for waterborne coatings in which the volatile direct measurement of the weight percent particularly in low volatile organic compound weight percent is below 5 percent. The organic compound content waterborne coatings(<150 g/L),generally gives better precision. California Polytechnic State University carried out method has been used successfully with higher organic content an extensive study for the California Air Resources Board comparing the waterborne coatings and with solventborne coatings (Note 2). precision of the direct method with the indirect method (CARB Standard 1.5 This test method may also be used to measure the Agreement No. 04.329) Detailed results of this study may be found in Development of an Improved VOC Analysis Method for Architectural exempt volatile organic compound content (for example, Coatings.2 This study may be used to decide if the present method or other acetone, methyl acetate, t-butyl acetate and methods in Practice D3960 are preferred for a specific coating. p-chlorobenzotrifluoride)of waterborneand solvent-borne 1.8 The values stated in SI units are to be regarded as coatings. Check local regulations for a list of exempt com- standard. No other units of measurement are included in this pounds. The methodology is virtually identical to that used in standard. Test Method D6133 which, as written, is specific