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Prototype for trace analysis in the lab
Two-part grinding jar made of martensitic chromium steel as a prototype for sample comminution prior to trace analysis.
- Industry
- Laboratory / analytics
- Scope
- Design, prototype
- Material
- Martensitic chromium steel
- Process
- Comminution 5 min at 30 Hz
- Testing
- Leak test with fluorescent powder
- Parts
- Jar and counterpart, screwed together
Starting point
Before trace analysis, the sample is comminuted. The smallest amounts count: abrasion from the jar distorts the result, and a leaking screw joint leads to sample loss and carry-over between batches.
Solution
Two-part grinding jar, consisting of jar and counterpart, screwed together.
- Process: comminution for 5 min at 30 Hz
- Material: martensitic chromium steel, hardened. High wear resistance with low abrasion, corrosion-resistant.
- Inner contour: rounded, without dead zones and with few transitions. The sample can be removed completely, and the jar is cleaned quickly between batches.
- Connection: positive-locking screw joint, designed for the loads of the grinding process
- Leak-tightness verification: test run with fluorescent powder under process conditions (5 min, 30 Hz). The parting line is then inspected under UV light for escaped powder.
Result
- Leak-tight under process conditions, verified with fluorescent powder
- Low contamination from the jar material into the sample
- Prototype for testing in everyday lab use and basis for the series version
