Test category: In-situ analysis of Hafnium isotopic composition Test target: zircon, baddeleyite, etc. Test period: 20-30 work days Requirements: 1.thin sections, thick sections, or polished sections, length ≤ 5 cm, width ≤ 3 cm, thickness ≤ 0.8 cm, analysis spot marked on the reflected light images. 2. measurements can be done either by customer or by our technician. 3.Zircon epoxy disc is needed. zircon 176Yb/177Hf should be < 0.15. Please inform us in advance if not. Analytical methods: In situ Hf isotope ratio analysis of zircon by LA-MC-ICP-MS Data quality: The precision (2SE) for 44 μm spot size is 0.000020-0.000040. The precision (2SE) for 32 μm spot size is 0.000030-0.000050. Applied standards: