家庭用エアゾル製品中のメタノール分析における妨害物質とヘッドスペースガスクロマトグラフィー法の検討

抄録

When the content of methanol in certain types of waterproofing aerosol products was determined according to the official method for household products containing harmful substances, the existence of an interfering substance in the products was found. The interfering substance was identified to be tert-butanol by GC-MS. In order to avoid this interference, we developed a simple headspace (HS)-gas chromatographic (GC) method. For this method, one gram of the sample sprayed into a 200 ml flask under ice cooling was weighed into a centrifugal tube. Each 10 ml of water and chloroform was added to the centrifugal tube. After shaking vigorously and centrifuging (3500 rpm, 5 min), 0.5 g of the aqueous layer was weighed into a 24 ml bottle. The bottle was incubated for 30 minutes at 25°C and then 50μl of the HS gas was injected into a GC with a fused silica capillary column coated with methyl phenyl cyanopropyl silicone. The proposed method was successfully applied to the screening analysis of methanol in 70 kinds of commercial household aerosol products.