Betekenis van:
crucible
crucible
Zelfstandig naamwoord
- plaats waar verschillende zaken tot een homogeen geheel worden verenigd
- a vessel made of material that does not melt easily; used for high temperature chemical reactions
Synoniemen
Hyperoniemen
crucible
Zelfstandig naamwoord
- metalen drinkbeker
- a vessel made of material that does not melt easily; used for high temperature chemical reactions
Synoniemen
Hyperoniemen
Voorbeeldzinnen
- Morganite Crucible Limited (United Kingdom),
- Finally, drain the crucible with suction, dry the crucible and residue, and cool and weigh them.
- Ash the filter and its contents in the original crucible.
- Assemble the heating unit (4.1) and the filter crucible (4.2), then attach the cylinder (4.3) to the crucible.
- Place the crucible in a desiccator, leave to cool and weigh immediately.
- Glass filter crucible with fused sintered glass filter plate pore size 40-90 μm.
- Place the crucible on the hot-plate and heat gradually until the substance carbonises.
- Ash for 3 hours. Place the crucible in a desiccator, leave to cool and weigh immediately.
- Weigh about 2,5 g of the sample to the nearest 1 mg in an ashing crucible.
- Drain the crucible with suction and wash the residue with formic acid reagent, hot water, dilute ammonia solution, and finally cold water, draining the crucible with suction after each addition.
- In the case of oils and fats, weigh accurately a sample of 25 g in a suitably sized crucible.
- Transfer any residual fibres to the crucible by washing out the flask with a little more formic acid reagent.
- Connect the crucible and its contents to the heating unit (4.1) and continue as described under 5.
- Dry the crucible to constant weight in the oven at 130 oC. After each drying cool in the desiccator and weigh rapidly.
- Wash the filter paper containing the insoluble residue twice with boiling water and place it in a quartz or platinum crucible.