Formaldehyde Detection in Office Chairs

Formaldehyde detection in office chairs should be carried out in accordance with standard methods, and the determination of whether the formaldehyde level exceeds the limit should be based on the limits and methods specified in the product standards.

I. Common Methods for Formaldehyde Detection

1. Chromatography, Electrochemical Sensor Method, and Spectrophotometry: These are general technical means for formaldehyde detection, suitable for laboratory or professional detection scenarios.
2. Desiccator Method: A common method for detecting formaldehyde emissions from wooden furniture. The test specimen is suspended in a desiccator containing water. After formaldehyde is released and dissolved in the absorption solution, it is subjected to color development and then measured by color comparison using a spectrophotometer, with the results expressed in mg/L.
3. Environmental Chamber Method: This method simulates actual usage conditions and is often used for arbitration testing of panels. The test specimen is placed in an environmental chamber with constant temperature and humidity, and the formaldehyde concentration in the chamber air is measured. The results are expressed in mg/m³, which is closer to the actual environmental emission level.
4. Perforator Extraction Method: This method is mostly used for detecting unfinished base materials. The free formaldehyde inside the panel is extracted using a solvent and then quantified, with the results reflecting the formaldehyde content level of the material itself.

II. Key Points for Determining Detection Results

1. Units Cannot Be Directly Converted: Different detection methods (such as mg/L in the desiccator method and mg/m³ in the environmental chamber method) have different measurement principles and units, so the values cannot be directly compared. The limit values specified in the product standards should be used as the basis.
2. Limitations of Portable Detectors: Portable detectors can be used for on-site preliminary screening, but their data accuracy is low and they are easily affected by the environment. They cannot replace the results of standard detection methods, and the detection reports issued by professional institutions should be used as the basis.

III. Verification of the Authenticity of Detection Reports There have been cases where merchants have tampered with detection report data, such as forging a report marked as "unqualified" on the official website into a "qualified" one. Consumers can verify the reports in the following ways:

• Log in to the official website of the detection institution using the detection report number to query the original report;
• Check whether the detection method, limit standard, and product identification in the report are consistent;
• Give priority to reports issued by third-party detection institutions with CMA/CNAS qualifications.

IV. Suggestions When purchasing office chairs, consumers should request merchants to provide formaldehyde detection reports that comply with product standards and verify the detection methods and limit values. If there are doubts about the results, they can entrust a professional institution to conduct a re-detection to ensure health and safety.