Bids are hereby invited for the following: Supply and delivery of proficiency testing samples (ISO/IEC 17043). Scope: The following test methods will be covered by the proficiency testing samples: • Gasoline Range Organics (water and soil); • Diesel Range Organics (water and soil); • Volatile Organic Compounds (water and soil); • Semi-Volatile Organic Compounds (PAH and Acids extractables for water; full suite SVOC for soil). Technical specifications: August 2024 / September 2024: 1. Nitrite; Quantity: 1; 2. Total Phenolics; Quantity: 1; 3. Simple Nutrients (NOx = Nitrite + Nitrate; NH3, O-PO4); Quantity: 1; 4. Trace Metals (Ag, Tl, Zn, Cu, Co, Ni, Cd, Be, Ba, Al, Mn, Mo, B, Pb, Sr, V, Fe); Quantity: 1; 5. Oil and Grease; Quantity: 1. January 2025 / February 2025: 6. Nitrite; Quantity: 1; 7. Total Phenolics; Quantity: 1; 8. Simple Nutrients (NOx = Nitrite + Nitrate; NH3, O-PO4); Quantity: 1; 9. Trace Metals (Ag, Tl, Zn, Cu, Co, Ni, Cd, Be, Ba, Al, Mn, Mo, B, Pb, Sr, V, Fe); Quantity: 1; 10. Oil and Grease; Quantity: 1; 11. On-line site for the capturing of laboratory results / data. (Тендер №108135928ru)