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See Chinese contents: GB/T 15516-1995 GB/T 15516-1995: Air quality - Determination of formaldehyde - Acetylacetone spectrophotometric method
This Standard specifies the acetylacetone spectrophotometric method to measure formaldehyde in industrial emissions and ambient air. This Standard applies to emissions in those industries such as resin manufacturing, coatings, rayon, plastics, rubber, dye, pharmaceutical, plaint, and tanning. And it also applies to determination of formaldehyde vapor produced when conducting pharmaceutical disinfection, corrosion, and fumigation. When the sampling volume is 0.5~10.0 L, the measuring range is 0.5~800 mg/m3. When formaldehyde concentration is 20 ug/10 ml, coexist 8g of phenol (400 times), 10mg of acetaldehyde (500 times), 600mg of ammonium ion (30000 times) without interference; coexist SO2, less than 20 ug, NO2 is less than 50 ug, the recovery of formaldehyde shall not be less than 95.
