Lead

Location:  Group 14, Period 6
Atomic Weight:  207.2
Coordination Number:  6
Chemical Form in Solution:  Pb(H₂O)₆⁺²

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, HF, and HNO₃. Avoid H₂SO₄. Stable with most metals and inorganic anions forming insoluble carbonate, borate, sulfate, sulfite, sulfide, phosphate, oxalate, chromate, tannate, iodate, and cyanide in neutral aqueous media.

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

Pb Containing Samples (Preparation & Solution):  Metal (best dissolved in 1:1 H₂O / HNO₃); Oxides (the many different Pb oxides are soluble in HNO₃, with the exception of PbO₂ which is soluble in HCl or HF); Ores and Alloys (best attacked using 1:1 H₂O / HNO₃); Organic Matrices (dry ash and dissolve in dilute HCl. Do not heat when dissolving to avoid precipitation of SiO₂).