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Stability: 2-100 ppb levels - stability unknown - (alone or mixed with all other metals) as the Si(OH) x(F) y 2. Stable with most inorganic anions with a tendency to hydrolyze forming silicic acid (silicic acid is soluble up to ~ 100 ppm in water) in all dilute acids except HF. do not mix with Alkaline or Rare Earths, or high levels of transition elements unless they are fluorinated). Unstable at ppm levels with metals that would pull F - away (i.e. Do not heat when dissolving to avoid precipitation of SiO 2).Ĭhemical Compatibility: Soluble in HCl, HF, H 3PO 4, H 2SO 4, and HNO 3 as the Si(OH) x(F) y 2. Mg Containing Samples (Preparation & Solution): Metal (best dissolved in diluted HNO 3) Oxide (readily soluble in above compatible aqueous acidic solutions) Ores (carbonate fusion in Pt 0 followed by HCl dissolution) Organic Matrices (sulfuric / peroxide digestion or nitric / sulfuric / perchloric acid decomposition, or dry ash and dissolution in dilute HCl. 1-10,000 ppm solutions chemically stable for years in 1-10% HNO 3 / LDPE container. Stability: 2-100 ppb levels stable for months in 1% HNO 3 / LDPE container. Stable with most metals and inorganic anions forming insoluble silicates, carbonates, hydroxides, oxides, and tungstates in neutral and slightly acidic media. Avoid HF, H 3PO 4, and neutral to basic media. HNO 3 or H 2SO 4) B(OH) 3 (water soluble) Ores (avoid acid digestions and use caustic fusions in Pt 0) Organic Matrices (dry ash mixed with Na 2CO 3 in Pt 0at 450☌ then increase heat to 1000☌ to fuse or perform a Na 2O 2 fusion in a Ni 0 crucible / Parr bomb).Ĭhemical Compatibility: Soluble in HCl, HNO 3 and H 2SO 4. 1000-10,000 ppm stable for years in dilute NH 4OH / LDPE container.ī Containing Samples (Preparation & Solution): Metal (crystalline form is scarcely attacked by acids or alkaline solutions amorphous form is soluble in conc. 1-1,000 ppm solutions chemically stable for years in 1% HNO 3 / LDPE container.

Stable with all metals and inorganic anions at low to moderate ppm levels. Do not return portions removed for pipetting to container.Ĭhemical Compatibility: Moderately soluble in HCl, HNO 3, H 2SO 4 and HF aqueous matrices and very soluble in NH 4OH. Storage & Handling: Keep tightly sealed when not in use.