GB/T 23993-2009 "Determination of formaldehyde content in water-based coatings - Acetylacetone spectrophotometric method" specifies the method for determining the formaldehyde content in water-based coatings and is applicable to various water-based coating products. The principle involves the extraction of formaldehyde from the sample through distillation, followed by its reaction with acetylacetone under acidic conditions to form a yellow compound. The absorbance is measured at a wavelength of 412 nm using a spectrophotometer, and quantification is performed using an external standard method. The detection requires instruments such as a distillation apparatus, spectrophotometer, and constant-temperature water bath, providing technical support for the environmental and safety testing of coatings.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2009-06-02 00:00:00 | Implementation Date | 2010-02-01 00:00:00 |
