SCF7@manvax.bitnet ("MYRNA E. WATANABE") (07/12/90)
Is there anybody out there who does or has done AA for lead in tissue samples who can send us a tried and true recipe for digestion of small quantities of samples -- 10-200 mg -- for AA using the graphite furnace method? We have been using a standard matrix of 70% perchloric acid, both concentrated and cut 1:10, but we are still too concentrated and are burning up the graphite tubes. We tried neutralizing with NaOH, but the sodium ions create interference. Any assistance would be appreciated. Please reply to: Myrna E. Watanabe Biology Dept. Manhattan College Bronx, NY 10471 USA Tel.: 212-920-0266 FAX: 914-376-7487 bitnet: scf7@manvax