Details and Standards for Deodorization Efficacy Test (Ammonia Gas Reduction Assay)

The Deodorization Efficacy Test (Ammonia Gas Reduction Assay) is a laboratory service used to measure how effectively a product can reduce or neutralize ammonia gas, which is a common representative of alkaline malodors (such as urine or sweat).

1. Testing Principle and Method

The test typically follows a chemical neutralization or adsorption principle. Ammonia gas is highly basic (alkaline). When it comes into contact with a deodorizing agent (especially those containing acidic components like Lactic Acid or Fermented Filtrates), a chemical reaction occurs, converting the volatile ammonia gas into an odorless salt (e.g., Ammonium Lactate).

General Procedure:

• Preparation: The test sample is placed in a sealed container or chamber of a specific volume.
• Gas Injection: A known concentration of Ammonia gas is injected into the chamber.
• Measurement: The concentration of the gas is measured at specific time intervals (e.g., 0, 30, 60, or 120 minutes) using a gas detector tube or Gas Chromatography (GC).
• Calculation: The reduction rate (%) is calculated by comparing the gas concentration in the sample chamber versus a control chamber (without the sample).

2. Testing Standards

Commonly used standards for this type of assay include:

• JEM 1467: A standard from the Japan Electrical Manufacturers' Association, often adapted for testing the deodorizing performance of materials and air purifiers.
• ISO 17299-2: Specifically for textiles, measuring deodorizing properties using the detector tube method.

3. Application to Tissue Paper

Yes, this test can be performed on tissue paper.
Since the sample requirement is typically small (around 1 gram), tissue paper can be easily tested. The paper can be treated with a deodorizing solution or have the active ingredients embedded in the fibers. The test will measure how well the treated tissue reduces the ammonia concentration in the surrounding air.

Sample Requirement:

• Approximately 1 gram of the sample is required for the assay.