铝、砷、硼、钡、铍、铋、钙、镉、钴、铬、铯、铜、铁、汞、钾、锂、镁、锰、钠、镍、铅、铷、硒、锌、钒,100μg/ml ,介质,5% HNO3, tr. HCl (5%硝酸，微量盐酸)