[7a-A503-1~12] 12.6 Nanobiotechnology

[7a-A503-8] Analysis of Amino Acids with an Aromatic Ring by the Scanning Atom Probe

〇Osamu Nishikawa¹, Masahiro Taniguchi² (1.Kanazawa Ins. Tech. Indus.-Univ. Colla., 2.Kanazawa Ins. Tech. Appl. Chem)

Keywords:amino acid, aromatic ring, scanning atom probe

It has been demonstrated that the atomic level analysis of amino acids such as glycine, methionine, leucine and peptides by the scanning atom probe is highly quantitative and qualitaive. However, these molecules do not contain an aromatic ring. Accordingly, tryptophan, tyrosine and phenylalanine were mass analyzed. Unexpectedly, no benzen and pyrrole rings were detected. However, a large number of ions with mass 29 were found, possibly HCNH₂. The cause of the unusual mass spectra will be discussed.