Location: Group 4, Period 6
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 concentrated HCl, HF, H2SO4 (very hot), and HNO3. Avoid H3PO4and neutral to basic media. Unstable at ppm levels with metals that would pull F- away (i.e. - do not mix with Alkaline or Rare Earths or high levels of transition elements unless they are fluorinated). Stable with most inorganic anions but precipitation with phosphate, oxalate, and tartrate with a tendency to hydrolyze forming the hydrated oxide in all dilute acids except HF.
Stability: 2-100 ppb levels stable alone or mixed with all other metals that are at comparable levels as the Hf(F)6-2 + Hf(OH)4F2-2 for months in 1% HNO3 / LDPE container. 1-10,000 ppm single element solutions as the Hf(F)6-2 chemically stable for years in 2-5% HNO3 / trace HF in an LDPE container.
Hf Containing Samples (Preparation & Solution): Metal (soluble in H2O / HF / HNO3); Oxide - unlike TiO2 the HfO2 is best fused in one of the following ways (Na2O2 in Ni0, Na2CO3 in Pt0 or Borax in Pt0); Organic Matrices (dry ash at 450°C in Pt0 and dissolve by fusing with Na2CO3 and dissolving in HF / HNO3 / H2O).
|Atomic Spectroscopic Information:|
1000ug/mL HAFNIUM 500mL
tr Nitric Acid /tr Hydrofluoric Acid
Associated Certifications: ISO 17025
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