Field desorption mass spectrometry of [6,6,7,12,13,13-hexamethyl-1,4,8,11-tetra-azacyclotetradeca- 7,11-diene]-nickel(II) and -copper(II) perchlorates

1982 ◽  
Vol 35 (2) ◽  
pp. 287 ◽  
Author(s):  
SP Roe ◽  
PG Cullis ◽  
PJ Derrick ◽  
JO Hill
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectra ◽  
Cluster Ions ◽  
Field Desorption ◽  
Desorption Mass Spectrometry ◽  
Fragment Ions ◽  
Field Desorption Mass Spectrometry ◽  
Anionic Species ◽  
Hydrogen Bonded

Field desorption mass spectrometry has been used to characterize the title complexes. The mass spectra indicate the presence of 'cluster ions' involving the macrocyclic cation hydrogen-bonded to perchlorate and water, and the absence of fragment ions of both the cationic and anionic species. The unique features of this investigation are the simplicity of the mass spectra and the ease of analysis of perchlorate compounds.

Field Desorption Mass Spectrometry of Mycotoxins and Mycotoxin Mixtures, and Its Application as a Screening Technique for Foodstuffs

1977 ◽  
Vol 60 (1) ◽  
pp. 73-82 ◽  
Author(s):  
James A Sphon ◽  
Peter A Dreifuss ◽  
Hans-Rolf Schulten
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectra ◽  
Molecular Ions ◽  
Field Desorption ◽  
Desorption Mass Spectrometry ◽  
Screening Technique ◽  
Field Desorption Mass Spectrometry

Abstract The field desorption mass spectra of a variety of mycotoxins have been studied. These include the 4 aflatoxins B1, B2, G1; and G2, rubratoxin B, T-2 toxin, and zearalenone, as well as mixtures of these mycotoxins. The spectra of all of the mycotoxins exhibited molecular ions [M]+. Under the conditions employed, only rubratoxin B exhibited major fragmentation. The field desorption technique has been applied to the analysis of both spiked and naturally contaminated extracts of foodstuffs. The potential of the method as an analytical screening technique for the presence of mycotoxins has been evaluated.

Field ionisation/field desorption mass spectrometry of polynuclear metal carbonyls

1980 ◽  
Vol 58 (8) ◽  
pp. 833-838 ◽  
Author(s):  
Dennis G. Tuck ◽  
Gordon W. Wood ◽  
Samuel Zhandhire
Keyword(s):  
Mass Spectrometry ◽  
Relative Abundance ◽  
Mass Spectra ◽  
Field Desorption ◽  
Metal Carbonyls ◽  
Desorption Mass Spectrometry ◽  
Molecular Ion ◽  
Field Desorption Mass Spectrometry

Field ionisation/field desorption mass spectra are reported for Mn2(CO)10, Cd[Co(CO)4]2 and some adducts, In[Co(CO)4]3, bipy•Zn[Co(CO)4]2, and bipy•M[Mn(CO)5]2 (M = Zn, Cd). The spectra are extremely simple, and the small number of easily identified species includes the molecular ion in some cases. The relative abundance of the fragments is discussed in terms of known stabilising factors in such compounds. No spectra could be obtained from Co2(CO)8 or Fe2(CO)9, which may be the result of their carbonyl-bridged structures.

Negative Ion Field Desorption Mass Spectrometry (NFD-MS) of Salts

1981 ◽  
Vol 20 (1) ◽  
pp. 111-112 ◽  
Author(s):  
Karl H. Ott ◽  
Franz W. Röllgen ◽  
Jan J. Zwinselman ◽  
Roel H. Fokkens ◽  
Nico M. M. Nibbering
Keyword(s):  
Mass Spectrometry ◽  
Negative Ion ◽  
Field Desorption ◽  
Desorption Mass Spectrometry ◽  
Field Desorption Mass Spectrometry
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