Mutsuga Motoh, Yamaguchi Miku, Ohno Hiroyuki, Kawamura Yoko
National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, Japan.
Shokuhin Eiseigaku Zasshi. 2010;51(5):228-36. doi: 10.3358/shokueishi.51.228.
Migration of 2 kinds of monomer and 21 kinds of primary aromatic amines (PAAs) from 21 kinds of nylon products such as turners, ladles and wrap film were determined. Samples were classified as regards materials by mean of pyrolysis-GC/MS. One sample was classified as nylon 6, 15 samples as nylon 66 and three samples as nylon 6/66 copolymers, while two samples were laminate of nylon 6 with polyethylene or polypropylene. All of the nylon 66 samples contained a small amount of ε-caprolactam (CPL), which is the nylon 6 monomer. Migration levels of monomers and PAAs at 60°C for 30 min into 20% ethanol were measured by LC/MS/MS. CPL was detected at the level of 0.015-38 µg/mL from all samples, excluding one wrap film sample, and 1,6-hexamethylenediamine was detected at the level of 0.002-0.013 µg/mL from all nylon 66 samples and one nylon 6/66 sample. In addition, 0.006-4.3 µg/mL of 4,4'-diaminodiphenylmethane from three samples, 0.032-0.23 µg/mL of aniline from four samples, 0.001 µg/mL of 4-chloroaniline from two samples, and 0.002 µg/mL of 2-toluidine and 0.066 mg/mL of 1-naphthylamine from one sample each were detected. The migration levels at 95 or 121°C were about 3 and 10 times the 60°C levels, respectively.
测定了21种尼龙制品（如搅拌器、长柄勺和保鲜膜）中2种单体和21种伯芳香胺（PAA）的迁移量。通过热解气相色谱/质谱联用仪对样品进行材料分类。一个样品被归类为尼龙6，15个样品为尼龙66，3个样品为尼龙6/66共聚物，另外两个样品是尼龙6与聚乙烯或聚丙烯的层压材料。所有尼龙66样品都含有少量的ε-己内酰胺（CPL），它是尼龙6的单体。通过液相色谱/串联质谱法测定了60℃下30分钟内单体和PAA向20%乙醇中的迁移量。除一个保鲜膜样品外，所有样品中CPL的检测水平为0.015 - 38μg/mL，所有尼龙66样品和一个尼龙6/66样品中1,6 - 己二胺的检测水平为0.002 - 0.013μg/mL。此外，在三个样品中检测到4,4'-二氨基二苯甲烷的含量为0.006 - 4.3μg/mL，在四个样品中检测到苯胺的含量为0.032 - 0.23μg/mL，在两个样品中检测到4 - 氯苯胺的含量为0.001μg/mL，在一个样品中分别检测到2 - 甲苯胺的含量为0.002μg/mL和1 - 萘胺的含量为0.066mg/mL。95℃或121℃下的迁移量分别约为60℃时的3倍和10倍。
