300 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS g I ! i • 4 8 12 16 'rIME (minutes) Figure 6. GC-TEA chromatogram of N-nitrosomethyldodecylamine (NDOMA) and N-nitrosomethylte- tradecylamine (NMTDA) in a hair-care product. Column length: 12 ft X 2 mm glass. Column packing: 10% UCW-982 on Gas-Chrom Q 80/100. Oven temperature: 210øC isothermal. (Reprinted with permis- sion from reference 25. Copyright 1982 Pergamon Press.)
ANALYSIS OF NITROSAMINES 301 i i I 4 8 12 16 TIME(minutes) Figure 7. GC-TEA chromatogram of N-nitrosomethyloctadecylamine (NMODA) in a hair-care product. Column length: 12 ft x 2 mm glass. Column packing: 3% Dexsil 300 on Chromosorb W AW 80/100. Oven temperature: 250øC isothermal. (Reprinted with permission from reference 26. Copyright 1983 Pergamon Press.)
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