The malt alkaloids N-methyltyramine, N,N-dimethyltyramine
(hordenine), N-methyl-3-aminomethylindole and N,N-dimethyl-3-aminomethylindole
(gramine) are known precursors for N-nitrosamines.
Analytical procedures were developed and applied to extract and
quantify these alkaloids from malt, green malt, malt roots, and
raw barley. A ground malt sample under nitrogen atmosphere was
extracted with 5 percent concentrated ammonium...