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Description
The Haldenwanger Crucible Medium Form L79MF is a small, thick-walled heating vessel made from high-quality porcelain and engineered specifically to withstand heating at very high temperatures in the laboratory. It plays a central role in classical analytical procedures, particularly gravimetric analysis, sample ashing, and material melting. Inside this crucible, samples are heated, burned, or melted until they reach constant weight, so that measurement results become accurate and fully defensible. As the container that holds the sample throughout the thermal process, the crucible must endure extreme heat, sudden temperature changes, and contact with aggressive chemicals. Because of this, selecting the right crucible determines the reliability of the entire analytical workflow in the laboratory.
The principal advantage of the L79MF crucible lies in its porcelain material, which offers outstanding thermal and chemical resistance. The glazed porcelain surface makes the vessel easy to clean, does not absorb water, and does not react with most reagents commonly used in the laboratory. Its medium form design provides a practical balance between capacity and heating efficiency, allowing uniform heat distribution while keeping the vessel compact and easy to handle on a balance. This combination of durability, chemical inertness, and low maintenance makes the L79MF a dependable, long-lasting choice for both routine and demanding laboratory work.
In Indonesian laboratories, particularly in quality control and research facilities across the food, environmental, and materials testing sectors, the L79MF crucible is a familiar fixture in daily workflows. Analysts rely on it for routine ashing of food and feed samples, determination of ash content, loss-on-ignition testing, and preparation of samples for elemental analysis. Its robust porcelain body stands up to repeated use in muffle furnaces, while its easy-to-clean surface helps laboratories maintain hygiene standards between batches, supporting consistent and reproducible results in both academic and industrial settings.
Laboratory Applications
- Gravimetric analysis: The crucible's constant-weight performance and inert glazed surface allow analysts to dry, ignite, and weigh precipitates repeatedly without contamination or mass drift, ensuring dependable quantitative results.
- Sample ashing: Its thick-walled porcelain body withstands prolonged exposure to high furnace temperatures, making it ideal for burning off organic matter from food, feed, and plant samples before mineral analysis.
- Loss-on-ignition testing: The medium form design promotes even heat distribution while the glazed surface resists thermal shock, enabling accurate weight-loss measurements on cement, soil, and mineral specimens.
- Material fusion and melting: The crucible tolerates aggressive chemicals and extreme heat, allowing fluxes and sample mixtures to be melted completely without the vessel cracking or reacting with its contents.
- Routine heating and drying duties: Its durable construction and easy-to-clean glazed surface make the L79MF a versatile, reusable vessel for everyday heating, drying, and thermal preparation tasks in busy laboratories.
Specifications
- Brand: Haldenwanger
- Category: Crucible
- Model / type: Medium form L79MF
- Material: high-quality glazed porcelain
- CAS number: not provided
- Physical form: small, thick-walled heating vessel in medium form; pack sizes and availability through AMI Scientific
Handling and Storage
Store the L79MF crucible in a clean, dry place, ideally inside a closed cabinet or a drawer lined with soft material to prevent chipping and surface scratches. Keep it away from moisture and corrosive fumes, as prolonged exposure can weaken the porcelain or dull the glazed finish. Before first use, condition the crucible by heating it gradually to the intended working temperature, and always allow it to cool slowly in the furnace or on a heat-resistant surface to avoid thermal shock. Handle it only with clean tongs or heat-resistant gloves, never place a hot crucible directly on cold or wet surfaces, and clean it thoroughly after each use so that residues are removed before the next analytical run.
