Nitrogen speciation of polar petroleum compounds by compound class separation and on-line liquid chromatography - mass spectrometry (LC-MS)

1994 ◽  
Vol 17 (4) ◽  
pp. 271-276 ◽  
Author(s):  
Chang Samuel Hsu ◽  
Kuangnan Qian ◽  
Winston K. Robbins
1979 ◽  
Vol 51 (14) ◽  
pp. 2324-2328 ◽  
Author(s):  
B. L. Karger ◽  
D. P. Kirby ◽  
Paul. Vouros ◽  
R. L. Foltz ◽  
B. Hidy

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