ASTM D 8661 : 2026

1.1This test method covers a procedure specified for the analysis of new enamel paint samples for the determination of lead (Pb) in the concentration range of 50 ppm to 300 ppm using the sandardization of an X-ray fluorescence (XRF) analyzer against inductively coupled plasma-optical emission spectroscopy (ICP-OES). This test method does not address the use and performance of ICP-OES for the analysis of Pb in paint, nor does it cover the generation of the ICP-OES versus XRF correlation.

1.2This test method should be used by analysts experienced in the use of XRF, the interpretation of spectral and matrix interferences, and procedures for their correction.

1.3In this test method, specific methods are cited for preparing test solutions of dried, homogenized new enamel paint samples for analysis.

1.4It is the user’s responsibility to ensure the validity of this test method for sampling materials of untested matrices.

1.5No detailed operating instructions are provided because of differences among various makes and models of suitable XRF analyzers. Instead, the analyst shall follow the instructions provided by the manufacturer of the particular instrument.

1.6In this test method, comparative accuracy of different devices or the precision between instruments of the same make and model are not addressed.

1.7In this test method, there are notes that are explanatory and are not part of the mandatory requirements of this test method.

1.8The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.9This 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.

1.10This 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.