[Analysis of primary aromatic amines in paper products].
A highly sensitive analytical method for 25 kinds of primary aromatic amines and azo-dyes in paper products was developed. Free amines and total amines of the samples were analyzed. The amount of each azo-dye was calculated from the amount of total amines by subtracting the amount of free amines. Amines and azo-dyes were migrated into water at 23 degrees C for 24 hours. Free amines were extracted into dichloromethane after alkalization with sodium hydroxide solution. Azo-dyes were reduced to amines with sodium dithionite, alkalized, and then extracted into dichloromethane as total amines. They were determined by GC/MS. The recoveries of 100 microg/kg amines spiked into migration solution were in the range of 69-122%, except for 4,4'-oxydianiline and 4,4'-diaminodiphenylmethane which gave recovery rates of approximately 40%. The determination limits of amines were 4-20 microg/kg in paper. Amines and azo-dyes were surveyed in 17 kinds of base paper and 16 kinds of paper products for food contact use. Aniline was detected at levels of 4-20 microg/kg from most recycled papers, whereas the other amines were not detected in any sample.
Mutsuga
Motoh
M
National Institute of Health Sciences, Tokyo, Japan.
Lee
Youn-Kyu
YK
Kawamura
Yoko
Y
Tanamoto
Kenichi
K
D000588:Amines / Q000032:analysis*; D001391:Azo Compounds / Q000032:analysis*; D004396:Coloring Agents / Q000032:analysis*; D003247:Conservation of Natural Resources; D008401:Gas Chromatography-Mass Spectrometry; D010209:Paper
D000588:Amines; D001391:Azo Compounds; D004396:Coloring Agents