Sample pretreatment and microwave digestion from EXPEC
Before ICP-OES, ICP-MS or AAS, solid samples must become clear solutions. EXPEC microwave digestion does this under controlled temperature and pressure, with less acid and less contamination than open-vessel methods. This subcategory holds the EXPEC 790S.
What decides the choice
- Sample type and mass — metals, ores, soils, food and plant material differ in reactivity and the pressure they build.
- Samples per run — racks from 6 to 24 positions set the daily capacity.
- Pressure and safety — 4–10 MPa pre-pressurisation in a single reaction chamber with duplex-steel construction and real-time pressure and temperature display.
- Acids — nitric, hydrochloric and hydrofluoric acid mixtures, matched to the vessel material and the ICP sample introduction.
- Cycle time — rapid chamber cooling shortens the time until the next run.
Why a single reaction chamber
In the 790S all vessels sit in one pressurised chamber, so every sample sees the same conditions. This gives uniform digestion across the rack and simple, safe handling, which is what a busy ICP laboratory needs.
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Sample Pretreatment
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