1. Scope

Keywords

Rationale

Cadmium and lead are extracted from the food-contact surface of test vessels by filling with 4% acetic acid to within 6-7 mm of overflowing and leaching for 24 hours at 22 ± 2 °C (same extraction procedure , and EAM Method 4.1). Portions of resulting analytical solutions are used to prepare test solutions for analysis. Cadmium and lead concentrations in test solutions are determined by inductively coupled plasma-optical emission spectrometry using a standard curve and linear least squares regression. Background correction is used to compensate for variable background emission contribution to analyte signal. Quality control procedures are incorporated for monitoring laboratory contamination and interference effects to ensure data quality.