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Ash volatile crucibles, typically made of porcelain or corundum, are high-temperature resistant containers used for determining the ash content and volatile matter in materials like coal, polymers, and food. They are essential for ashing organic samples in muffle furnaces at high temperatures (
), ensuring precise mass measurement for analytical chemistry, as noted in the POBEL guide.
Key Uses and Procedures
- Ash Content Determination: Samples are heated to burn off organic material, leaving only inorganic residue, explained in this wikidoc article.
- Volatile Matter Testing: Crucial for determining volatile matter in coal by measuring weight loss upon heating.
- Calcination and Incineration: Used in lab procedures to remove volatile components via, as shown in this POBEL guide.
- Material Analysis: Frequently used in ASTM tests for coal, petroleum coke, and polymers, according to this Amazon listing.
Best Practices for Use
- Pre-ignite: Before use, the crucible should be pre-ignited, cooled, and weighed (often with a lid) to ensure a constant mass.
- Controlled Heating: Avoid, as described in this XRF Scientific guide , rapid temperature changes (thermal shock) to prevent cracking.
- Desiccator Use: Always cool the crucible in a desiccator to avoid moisture absorption, according to this GGS Ceramic guide.
- Handling: Use high-temperature tongs to handle the crucible, as detailed in this GGS Ceramic guide.
Common Material Types
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Web results
How to Use and Maintain Laboratory Crucibles
XRF | Technology
https://www.xrfscientific.com › use-maintain-laboratory-...
XRF | Technology
https://www.xrfscientific.com › use-maintain-laboratory-...
A laboratory crucible is a container that can endure extremely high temperatures, is used to stop metals, glass, and pigment from melting in a furnace.Read more
Using Laboratory Crucibles Effectively
AZoM
https://www.azom.com › article
AZoM
https://www.azom.com › article
Nov 15, 2023 — A laboratory crucible is a high-temperature-resistant container designed to facilitate the melting of metals, glass, and pigments in a furnace.Read more
1pcs Corundum Crucible for Ash Volatile Analysis
Amazon.com
https://www.amazon.com › 1pcs-Corundum-Crucible-V...
Amazon.com
https://www.amazon.com › 1pcs-Corundum-Crucible-V...
Durable construction withstands high temperatures, making it ideal for various laboratory experiments and analyses. Perfect for use in laboratories, ...Read more
Laboratory Crucible: What It Is and What It's Used For in ...
POBEL
https://pobel.com › Home › Blog › Guides
POBEL
https://pobel.com › Home › Blog › Guides
Jul 22, 2025 — Other uses include bead preparation, ash analysis, and metal smelting. Handling and Safety Precautions When Using a Laboratory Crucible.Read more
How to Properly Use A Crucible In Laboratory: Your Essential ...
ggsceramic.com
https://ggsceramic.com › News
ggsceramic.com
https://ggsceramic.com › News
Jun 23, 2025 — A: Crucibles are used in the laboratory for heating substances, ashing organic materials and melting metals. Q: What is the correct use of a ...Read more
Characteristics and Applications of Porcelain Crucibles
Hawach Scientific
https://www.hawach.com › News
Hawach Scientific
https://www.hawach.com › News
Nov 26, 2025 — They are commonly used in gravimetric analysis to measure the mass of substances after high-temperature treatment, and in calcination or ...Read more
Crucible
chemeurope.com
https://www.chemeurope.com › encyclopedia › Crucible
chemeurope.com
https://www.chemeurope.com › encyclopedia › Crucible
A crucible can be similarly used to determine the percentage of ash contained in an otherwise burnable sample of material such as coal, wood, or oil. A crucible ...Read more
How to Select your prepASH™ Crucible - Precisa
precisa.com
https://www.precisa.com › Blog Posts
precisa.com
https://www.precisa.com › Blog Posts
The prepASH uses porcelain glazed crucibles to hold samples during analysis. These crucibles are placed onto a sample plate holder, which rotates the crucibles ...Read more
Precision Porcelain Labware丨Porcelain Lab Equipment
CS Ceramic Co.,Ltd
https://www.csceramic.com › laboratory-porcelain-labwa...
CS Ceramic Co.,Ltd
https://www.csceramic.com › laboratory-porcelain-labwa...
Alumina crucible and boat are wildly used in laboratory and industrial analysis as well as metal and nonmetal material sample melting.Available in various sizes ...Read more