| Autor: |
J H, Hotchkiss, L M, Libbey, J F, Barbour, R A, Scanlan |
| Rok vydání: |
1980 |
| Předmět: |
|
| Zdroj: |
IARC scientific publications. (31) |
| ISSN: |
0300-5038 |
| Popis: |
An analytical procedure has been outlined in which volatile N-nitrosamines in foods are isolated by vacuum distillation, cleaned up, identified and quantified by GC-TEA and qualitatively confirmed by GC-MS, coupled with a data system. Spectra are presented which demonstrate that this technique is capable of confirming NDMA and NPYR in a variety of foods at levels of 1 to 10 micrograms/kg. Unequivocal confirmation is based on three types of evidence: (1) the compound is TEA positive; (2) the compound has the correct retention time on a packed and on a capillary column; (3) the complete mass spectrum closely matches standard spectra. These procedures have been used to confirm the presence of trace levels of NDMA in domestic beer and in non-fat dry milk. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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