Isotope Geochemistry Lab

Preparing solution for stage 2 columns (LN Spec resin with “cap” of anion resin to hold LN Spec in place):

1. Take solution from stage 1 (0.05 HNO3) and evaporate to dry.
2. When cool, add 100 μL 6M HCl let sit overnight.
3. Ultrasonic with cap on for a few minutes to get into suspension. If spot remains suck up fluid and blow over spot (do not scrape). Clean pipet for each sample
4. Evaporate slowly to dryness and let cool.
5. Add 20 uL 0.50 M HCl, and let sit overnight.
6. Check for dissolution. If spot remains, ultrasonic and blow fluid over spot until gone (do not scrape).
7. Add 35 uL MQ water to make ~0.18M HCl, which is what goes on the stage 2 columns

Print and continue on LN Spec data sheet.

Beakers:

M: Sarah M
T: Katie M
W: Daven
R:Katie M/Kelsey
F: Arden/Katie H

Zircon lab beakers: Miquela

Filaments:
Miquela/Kelsey
Sean
Katie M-backup

Swiffering:
M/T: Sean
R/F: Sarah M

317/Ordering/Waste disposal: Courtney
312: Josh
Rock crushing lab: Sean

• Disassemble turret:  Screws, springs, ballbearings, retaining ring and screw, and turret handle are not cleaned (store in small beaker).
• Turret blocks go into 2000 mL Pyrex beaker and turret goes into 4000 mL Pyrex beaker.
• Add reagent grade 3.5M HNO₃ to both beakers.
• Boil for an hour on hotplate in the clean lab hood.
• Cool and discard nitric acid into used nitric acid container.
• Rinse 5 times with MQH₂O and discard into used nitric acid container.
• Add ACS-grade hydrogen peroxide (H₂O₂) to both beakers.
• Boil for an hour on hotplate in the clean lab hood.
• Cool and discard hydrogen peroxide into used hydrogen peroxide container.
• Rinse 5 times with MQH₂O and discard into used hydrogen peroxide container.
• Rinse 1 time with methanol and discard methanol into used methanol container.
• Dry in the 70°C oven in the mass spec lab.
• When dry, return to loading bench.