Strontium

Location:  Group 2, Period 5
Atomic Weight:  87.62
Coordination Number:  6
Chemical Form in Solution:  Sr(H₂O)₆⁺²

^{Intended Use: For the calibration of analytical instruments and validation of analytical methods as appropriate.}

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 and HNO₃. Avoid H₂SO₄, HF and neutral to basic media. Stable with most metals and inorganic anions forming insoluble silicate, carbonate, hydroxide, oxide, fluoride, sulfate, oxalate, chromate, arsenate, and tungestate 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 1-3.5% HNO₃ / LDPE container.

Sr Containing Samples (Preparation & Solution):  Metal (is best dissolved in diluted HNO3);Ores (Carbonate fusion in Pt⁰ followed by HCl dissolution); Organic Matrices (dry ash and dissolution in dilute HCl. Do not heat when dissolving to avoid precipitation of SiO₂).