1. What Is Loss On Ignition?

Loss On Ignition (LOI) is a test used in analytical chemistry and materials science to determine the volatile content or organic matter in a sample by measuring the mass loss after heating at high temperatures.

2. How Does The Calculator Work?

The calculator uses the LOI formula:

Where:

• \( \text{Initial Mass} \) — Mass of sample before ignition (g)
• \( \text{Final Mass} \) — Mass of sample after ignition (g)

Explanation: The formula calculates the percentage of mass lost during the ignition process, representing the volatile content of the material.

3. Importance Of LOI Calculation

Details: LOI is crucial for determining organic matter content, moisture content, and volatile compounds in various materials including soils, sediments, construction materials, and industrial products.

4. Using The Calculator

Tips: Enter initial mass and final mass in grams. Both values must be positive, and final mass should be less than or equal to initial mass for valid results.

5. Frequently Asked Questions (FAQ)

Q1: What temperature is typically used for LOI testing?
A: LOI testing is typically conducted at temperatures between 550°C to 1000°C, depending on the material and specific standards being followed.

Q2: What does a high LOI value indicate?
A: High LOI values indicate high volatile content, which could be organic matter, moisture, carbonates, or other compounds that decompose upon heating.

Q3: How long should samples be ignited?
A: Ignition time varies by material but typically ranges from 2 to 4 hours, or until constant mass is achieved.

Q4: What materials are commonly tested using LOI?
A: Common materials include soils, sediments, cement, limestone, coal, biomass, and various industrial powders and minerals.

Q5: Are there any limitations to LOI testing?
A: LOI may not distinguish between different types of volatile compounds and can be affected by sample preparation, heating rate, and furnace atmosphere.