Chemical Details

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

REMARKS - The spectrum shows a carbohydrate fragment pattern of the dextran backbone (e.g. m/z 32, 43, 55, 58, 60, 72, 102, 110, 126) somewhat overshadowed by ion signals derived from the diethylaminoethyl units. The main molecular ions representing the latter group appear at m/z 135 and 137 and presumably represent a (C2H5)2 NC2H4C1 organochlorine compound formed during the pyrolysis process. For a discussion of other organochlorine products formed by pyrolysis of quaternary ammonium compounds in the present of CI" ions see Spectra D.10, D.11 and Part I, Section 3.5. The intense ion signals at m/z 86, 99, 120 appear to represent electron impact fragments of the molecular ion at m/z 135, formed by the loss of 15 (CH3), 36 (HC1) and 49 (CH2C1) daltons, respectively. The high intensity fragment at m/z 86 has proven to be a useful marker for detecting small quantities of DEAE-dextrans in biological samples, e.g. virus preparations (ref. 63).

: DIETHYLAMINOETHYL-DEXTRAN

: glucan with ether-linked -0-CH7-CH„-NH(C7H,-),+Cl" groups; MW = 2 X 106 c 5

: Pharmacia, Sweden

: standard

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