Advertising Claims Audit System
Every Claim Has an Evidence Boundary.
Third-Party Test Reports Have Limits.
Advertising Claims Must Stay Within Them.
Claim Endpoint - Evidence Endpoint = Evidence Gap
🔥 We Don't Debate Claims. We Examine the Evidence.
VeriLedger™ — A Scientific Method for Evaluating Evidence Behind Product Advertising Claims.
What Is VOC?
Volatile Organic Compounds (VOCs) are airborne chemicals released from everyday materials, including furniture, paints, adhesives, and building products.
Some VOCs pose health risks, making their removal and molecular decomposition important areas of scientific research.
Why VOCs Remain Indoors
Indoor environments are often enclosed, with limited ventilation and recirculating air. VOCs released from building materials, furniture, and household products can remain in the indoor air and lead to repeated exposure.
Unlike particles, VOCs exist as gas-phase molecules and do not simply settle out of the air. Their continued presence may affect indoor air quality over time.
How VOCs Affect the Body
① Respiratory System
Some VOCs are inherently irritating. Long-term exposure may make the respiratory tract more sensitive and worsen allergy or asthma symptoms. It may also lead to chronic coughing, throat dryness, breathing discomfort, and increased sensitivity in enclosed indoor environments.
② Nervous System
Certain solvent-based VOCs may affect central nervous system function under specific concentration and exposure conditions. This may lead to dizziness, reduced concentration, drowsiness, slower responses, and discomfort that becomes more noticeable during prolonged exposure.
③ Metabolic System
Most VOCs are metabolized by the liver and excreted through the kidneys. Long-term exposure to high concentrations may increase the burden on the body’s metabolic system. Some VOCs, such as benzene and formaldehyde, have already been classified as carcinogens by international agencies, and their risks are associated with long-term exposure.
The Nature of the Risk
The health risks of VOCs are not limited to immediate exposure. Prolonged exposure to certain VOCs, even at low concentrations, may contribute to long-term health effects.
Reducing odors alone does not necessarily eliminate VOC pollution. Effective molecular decomposition can help address these pollutants at their source.
Gas-Phase Air Cleaning
Volatile Organic Compounds (VOCs) are gas-phase pollutants, fundamentally different from airborne particles such as dust and PM2.5.
International standards, including ASHRAE 145.1, ASHRAE 145.2, ISO 10121, and ANSI/AHAM AC-4, establish testing frameworks for gas-phase air-cleaning technologies.
However, the presence of catalytic materials or a high pollutant removal rate does not, by itself, prove molecular decomposition.
True VOC decomposition requires scientific evidence that supports the claimed transformation of pollutant molecules—not merely a reduction in their measured concentration.
VOC Control Methods
① Ventilation
Introduces outdoor air to dilute indoor VOC concentration.
② Adsorption
Captures VOCs in adsorptive materials, but does not change their molecular structure.
③ Decomposition
Changes VOC molecules into more stable substances by altering their chemical structure.
PCO Technology
Photocatalytic Oxidation (PCO) uses light energy to activate semiconductor catalysts, such as titanium dioxide (TiO₂), generating reactive species that can break down volatile organic compounds (VOCs) through oxidation.
Unlike physical adsorption, PCO is designed to chemically transform pollutant molecules. Under suitable reaction conditions, VOCs can be progressively decomposed into simpler substances, potentially achieving complete mineralization into carbon dioxide (CO₂) and water (H₂O).
PCO provides a scientific foundation for VOC decomposition. However, the actual performance of any PCO-based product must be established through appropriate scientific testing.
Operational Stability Challenges
The challenge of Photocatalytic Oxidation (PCO) is not simply initiating a chemical reaction, but maintaining stable VOC decomposition performance under continuous operation.
Long-term performance depends on several interconnected factors, including light intensity, catalyst activity, airflow design, and sufficient reaction time.
A reliable PCO system requires a well-designed reaction environment—not merely an effective catalytic material.
VOC Decomposition
Volatile Organic Compounds (VOCs) exist in the air as gas-phase molecules. Unlike physical adsorption, true VOC decomposition involves chemically transforming these molecules rather than simply capturing or storing them.
In a photocatalytic reaction system, VOC molecules passing through the reaction zone can undergo oxidation, breaking down their original molecular structures and potentially converting them into simpler substances, such as carbon dioxide (CO₂) and water (H₂O).
The essential distinction is temporary removal versus actual molecular decomposition. A reduction in VOC concentration alone does not prove decomposition; scientific evidence must establish that chemical transformation has occurred.
VOC Decomposition Criteria
① Gas-Phase Reaction
VOC decomposition must take place during the gas-flow process, rather than remaining only on the surface of a material or within its pores.
If pollutants are merely adsorbed, retained, or temporarily attached while their molecular structure remains unchanged, it cannot be considered true decomposition.
② Operational Stability
VOC decomposition must not occur only for a short period of time. It must remain stable throughout continuous operation.
If reaction efficiency declines rapidly, reaction conditions cannot be maintained, or system performance drops noticeably over time, it cannot be considered truly stable VOC decomposition.
③ Measurable Reduction
VOC concentration must show a stable and verifiable downward trend, with consistent changes observable through instrumentation.
This reduction must not result merely from dilution or ventilation, but from an actual measurable decrease under controlled conditions.