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Note: LOI determines the amount of alteration of the sample, generally, scientists use this to determine the 'freshness' of the ingenious rock being analyzed. Typically we use unignited powder in the bead preparation as that is what correlate correlates to the certified values. However it is not always the case. Please speak to the geochemists regarding their preference to of ignited or unignited powders in the bead preparation. There are many standards (both unignited and ignited) available for the geochemists to include in their dataset.
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- Compensated Dual Analytical Balance System (Metler Mettler Toledo balances)
- Drying ovens at 110°C and 60°C
- Muffle furnace
- Sonicating bath
Hard Rock
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Processing
- Splitting room saw
- Buehler grinder/polisher with 70 µm grit diamond grinding wheel
- Sonicator (with small water bath)
- X-Press crusher
- Spex Shatterbox with tungsten carbide (WC) grinding vessel
- Spex Mixer Mill with tungsten carbide or alumina canisters
- Retsch MM400 Mixer Mill
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- 0.172 mM LiBr wetting agent (0.15 mg ultrapure LiBr in 10 mL DI water)
- 400mg of drew sighed lithium metabolite flux (weighed on shore)
- 10% nitric acid (143 mL concentrated nitric acid/L of solution). Caution! always add acid to water.
- Isopropyl alcohol, laboratory grade
- DI Deionized water (18.2 M¿ laboratory MΩ/cm2 laboratory water obtained from Chemistry Lab)
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- Beakers
- Glass cleaner
- Tweezers
- Teflon spatula
- X-Press aluminum die
- Core liner pieces
- Delrin plugs1-oz glass bottles
- Sample vials or jars
- Weighing paper, 6 x 6
- Kimwipes
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