Sample

CHEMICAL DETAILS SAMPLE ORIGIN SAMPLE PREP./SIZE PYROL. CONDITIONS TOTAL ION COUNTS

2-KET0-3-DE0XY0CT0NATE (KDO), NH4+-salt [3-deoxy-manno-octulosonic acid)

see insert in spectrum; CgH^O-,,

MW=222

Sigma Chemical Corp., St. Louis, USA solution in PBS buffer; 10 yg standard 6 X 104

REMARKS - Note the characteristic peak series at m/z 110, 112, 122 and 140 (see also Spectra A.20 and A.20a). The high m/z 17 originates from the ammonium ions.

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