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- W1987029494 abstract "Unhydrogenated or hydrogenated phosphatidylsulfocholine (2 μg) of the non-photosynthetic diatom Nitzschia alba was analyzed by ammonia desorption chemical ionization mass spectrometry (NH3-DCIMS) using a flash heating method. Each molecular species was recognized by its quasi-molecular [M + 18]+ ion peak and by a substitution ion which corresponds to the replacement of -(CH3)2 by -H3. With unhydrogenated or hydrogenated mixtures (3 μg) of Nitzschia alba phosphatidylsulfocholine and egg yolk phosphatidylcholine, in weight proportions 1:1, 1:2 and 1:5, respectively, the phosphatidylsulfocholine diagnostic [M + 18]+ ions appeared ahead of the phosphatidylcholine diagnostic [M + 1]+ ions, thus allowing analysis of phosphatidylsulfocholine separately from phosphatidylcholine. These results show that NH3-DCIMS with fast heating is a suitable technique to study complex phosphatidylsulfocholine-phosphatidylcholine mixtures. This technique should be directly applicable to the detection of phosphatidylsulfocholine in natural phosphatidylsulfocholine-phosphatidylcholine mixtures as well as to the identification of their main molecular species." @default.
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- W1987029494 date "1985-03-01" @default.
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- W1987029494 title "Ammonia desorption chemical ionization mass spectrometry of phosphatidylsulfocholine-phosphatidylcholine mixtures" @default.
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- W1987029494 doi "https://doi.org/10.1016/0009-3084(85)90038-6" @default.
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