Summary
Type: SPE
Application #: 305680
Catalog#: 730033 - SPE Cartridges, Chromabond, NH2, 3ml, PP, 500mg, 50/pk
Detection:
Conditions: Column conditioning: 2 x 3 mL 1 mol/L nitric acid (Suprapur), then 2 x 3 mL ultra pure laboratory water; pH of washing water was controlled
Sample aspiration: The pretreated and filtered (0.45 µm) samples were passed through the column by vacuum.
- samples from May: 50 mL of surface water; 30 mL of soil water
- samples from August: 10 mL of surface water; 10 mL of soil water
- standards: 10 mL of working solutions (20, 40, 60 µg/L)
- spiked samples: 10 mL of aqueous soil extract
Filtrates with Cr(III) were collected in glass tubes with caps. 25 µL nitric acid was added.
Elution: Cr(VI) was eluted with 2 mol/L nitric acid and collected in glass tubes with caps.
- samples from May: 2–3 x 6 mL
- samples from August: 10 mL
- standards: 10 mL
- spiked samples: 10 mL
Authors: Koivuhuhta, A. et al.
Source: Bulletin Geol. Soc. Finland, Vol. 80, 2008, 125–13