Glass Matrix Test Methods Evaluation for Toxics in Packaging Report
Brooks Rand Labs (BRL) participated in a recently-published intercomparison study for the determination of total cadmium (Cd) and lead (Pb) in glass packaging materials. For this study, sponsored by the California Department of Toxic Substances Control and administered by the Toxics in Packaging Clearinghouse, ten labs were sent twelve glass samples, including nine glass bottles and three glass reference materials. The results indicated that digestion methods utilizing hydrofluoric acid (HF), such as EPA Method 3052, were effective at liberating the Cd and Pb from the glass matrix, while methods that did not use HF were inadequate (e.g., EPA Method 3050B recovered only 0-1% of the Cd and Pb).
The full study report can be viewed here. In this study BRL was identified as Lab #8. For quantitative and accurate results, it is critical to work with a lab, such as BRL, that has the necessary experience working with low-level metals and HF digestions. Our Pb results for 12 NIS (NIST 615 Reference Material) in Tables 6 and A11 clearly demonstrate BRL’s proficiency with these types of analyses.
BRL routinely performs various metals analysis using HF for complete dissolution digestions. Contact us today to discuss how our methodologies may be of use for your next project!