Test sample burnoff, residue, and mineral stability. Review replicate results, limits, and exportable quality records. Make production decisions using clear ignition loss metrics daily.
| Sample ID | Material | Tare Mass (g) | Before Ignition (g) | After Ignition (g) | LOI % |
|---|---|---|---|---|---|
| LOI-101 | Clay Blend | 24.8500 | 27.3500 | 26.9800 | 14.800 |
| LOI-102 | Limestone Powder | 25.1000 | 27.6000 | 26.7000 | 36.000 |
| LOI-103 | Mineral Filler | 25.0000 | 27.2000 | 27.0400 | 7.273 |
Dry Sample Mass = Mass Before Ignition − Empty Crucible Mass
Residue Mass = Mass After Ignition − Empty Crucible Mass
Mass Loss = Mass Before Ignition − Mass After Ignition
LOI % = (Mass Loss ÷ Dry Sample Mass) × 100
Ash % = (Residue Mass ÷ Dry Sample Mass) × 100
Dry Basis LOI % = (LOI % × 100) ÷ (100 − Moisture %)
Average Replicate LOI = Sum of replicate LOI values ÷ Number of replicates
Range = Highest replicate LOI − Lowest replicate LOI
Loss on ignition testing helps manufacturers measure material behavior under high heat. It shows how much weight a sample loses during ignition. The loss can come from moisture, organics, carbonates, or volatile compounds. This value supports better raw material control. It also helps teams detect unstable feedstock before production. Plants use LOI results in ceramics, cement, minerals, refractories, powders, and fillers.
This calculator converts measured masses into useful quality values. It estimates dry sample mass, residue mass, ash percentage, and loss on ignition percentage. It also supports replicate review. That helps technicians compare repeated tests from the same batch. Standard deviation and range reveal testing consistency. A moisture adjustment is included for dry basis analysis. That is useful when the incoming sample contains known moisture.
Production teams compare LOI against product specifications and process limits. A higher value may indicate more organics, more carbonate decomposition, or more volatile material. A lower value may show better calcination or reduced combustible content. These findings affect firing curves, kiln load planning, blending, and final product stability. Consistent LOI values improve batch uniformity. They also reduce waste, rework, and unexpected process drift.
This page is designed for fast plant use. The form is simple. The output appears above the entry fields for easy review. The example table helps with operator training. The formula section shows the exact method used. Export tools help create records for audits, lab logs, and internal reports. With one page, a quality team can analyze ignition loss, document results, and support better manufacturing decisions.
It measures the percentage of sample mass lost after heating. The loss usually comes from moisture, organics, carbonates, or other volatile substances released during ignition.
LOI helps control raw material consistency. It supports stable firing behavior, better blend control, lower waste, and improved final product quality in many production lines.
A negative value means the sample gained mass after heating. That can happen through oxidation or reaction with the furnace atmosphere. The calculator reports that condition.
LOI shows the percentage lost during ignition. Ash percentage shows the residue left after ignition. Together, they explain the sample balance after heating.
Replicate values help check repeatability. Average, range, and standard deviation reveal whether the test is stable or whether sample handling needs review.
Use moisture correction when the material has known moisture and you want a dry basis LOI result. That supports more consistent comparison between batches.
Yes. It is useful for ceramics, cement inputs, minerals, powders, fillers, and other heated materials where ignition loss affects manufacturing performance.
It gives a quick compliance check. Operators can see whether the average replicate result is within the plant limit or above the allowed specification.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.