D. CAVADORE (CEA - Marcoule)

3 urine samples (about 500mL) named A, B and C with mention of the exact volume.
- sample A (concentration < 50 microg.L^-1 and < 1.25 Bq.L^-1)
- sample B (activity < 0.200 Bq.L^-1)
- sample C: blank urine sample

EXPRESSION OF RESULTS
µg.sample^-1 (mass)
Bq.sample^-1 (activity)
Each laboratory will have to measure the exact mass or activity