Vanadium

Location:  Group 5, Period 4
Atomic Weight:  50.9416
Coordination Number:  6
Chemical Form in Solution:  H₂V₁₀O₂₈^4-

Storage & Handling:  Keep tightly sealed when not in use. Store and use at 20 ± 4°C. Do not pipet from container. Do not return portions removed for pipetting to container.

Chemical Compatibility:  Soluble in HCl, HNO₃, H₂SO₄, HF, H₃PO₄, and strong basic media. Stable with most metals and inorganic anions in acidic media.

Stability:  2-100 ppb levels stable for months in 1% HNO₃ / LDPE container. 1-10,000 ppm solutions chemically stable for years in 1-5% HNO₃ / LDPE container.

V Containing Samples (Preparation & Solution):  Metal (fusion with NaOH or KOH in Ni⁰ or Na₂CO₃ / KNO₃); Oxides (V₂O₃ - use HCl; V₂O₄ - use HCl or HNO₃; V₂O₅ - use conc. acids); Ores (Na₂CO₃ / KNO₃ in Pt⁰ (caution - nitrates attack Pt^o) followed by water extraction of fuseate); Organic Matrices (ash at 450°C followed by dissolving according to V₂O₅ above).