Mass spectrometry of metal chelates-III Further studies on metal oxinates.

The mass spectra of the oxmates of gallium, dysprosium, beryllium, samarium, cadmium, neodymium, indium, bismuth, lanthanum, yttrium and gadolinium have been recorded. The results have been correlated with the structures proposed m the literature. The integrated ion current method has been applied to determine submicrogram quantities of some of these compounds. Oxinates insoluble in organic solvents or undergoing reaction on solution were precipitated directly in the evaporation probe. The factors which determine the suitability of metal chelates for the estimation of metals by this method are discussed together with the instrumental factors which determine the ultimate sensitivity.

The mass spectrometry of metal chelates--II. Oxinates of common metals.

The mass spectra of the oxinates of zinc, iron(III), manganese(II), nickel, cobalt, aluminium, copper and magnesium have been measured. Concentrations of several of these chelates have been related to the integrated ion currents recorded at a significant m/e value during evaporation of the sample in the source of an A.E.I. M.S.9 mass spectrometer. The structural significance of some of the mass spectra is discussed.