Sample

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

SOIL POLYSACCHARIDE (water extractable fraction from Granite Brown Soil; see Spectrum F.l).

see ref. 188; C 37.8%; H 6.8%; N 2.1%; 0 53.3%; ash 22%

Huelva, SW Spain suspension in methanol; approx. 20 yg standard not determined

REMARKS - The spectrum shows a pattern consistent with a relatively pure, but highly complex carbohydrate fraction containing neutral sugar residues as well as N-acetyl aminosugars. The presence of the latter is evidenced by ion series at m/z 17, 67, 81, 109, 125, 137 and 151. High signals at m/z 114 and 128 appear to indicate the presence, of pentose and deoxyhexose residues respectively. Note the relatively low intensity of sulphur-containing ion signals at m/z 34, 48 and 64.

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