Выражение встречается в следующем контексте:
the results of the investigation were called into question because the method of analysis, Gas Liquid Chromatography/Thermal Enargy Analysis, because the presence of nitromusks would give positive results for nitrosamine formation. This is in contrast to primary and tertiary alkanolamines/alkyl amines which are much likely to form nitrosamines.

Заранее спасибо