Quantitative determination of hafnium in mixtures of zirconium–hafnium hexachloro alkali compounds by neutron activation analysis and X-ray fluorescence

1983 ◽  
Vol 61 (9) ◽  
pp. 2189-2191 ◽  
Author(s):  
C. A. Pickles ◽  
G. J. Kipouros ◽  
S. N. Flengas ◽  
R. G. V. Hancock
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Quantitative Determination ◽  
Analytical Techniques ◽  
X Ray ◽  
Alkali Compounds

A procedure for the determination of Hf in both mixtures of HfCl4–ZrCl4 and A2HfCl6–A2ZrCl6, where A = Li, Na, K, Rb, or Cs, is described. The method involves conversion of the chlorocompounds into HfO2–ZrO2 mixtures and subsequent analysis by either X-ray fluorescence or neutron activation analysis. The two analytical techniques are compared with regard to accuracy and simplicity.

A Review of Bromine Determination in Foods

1975 ◽  
Vol 58 (4) ◽  
pp. 711-716 ◽  
Author(s):  
Milton E Getzendaner
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Organic Compounds ◽  
Methyl Bromide ◽  
Ethylene Dibromide ◽  
X Ray ◽  
Instrumental Methods ◽  
Bromine Determination

Abstract Organic compounds containing bromine, including methyl bromide, ethylene dibromide, and l,2-dibromo-3-chloropropane, have been used extensively for the fumigation of foods, or soils in which foods grow, making it necessary to determine residues of bromine and bromine-containing organic compounds. A large number of methods for the determination of bromine in foods, as organic, inorganic, and combined total bromide, have been developed. In methods for organic bromide, the bromine is converted to the inorganic form for measurement by titration, photometry, or other means. In recent years, instrumental methods have been developed in which the total bromine in the sample is determined, regardless of the state in which it exists. X-ray fluorescence and neutron activation analysis are the 2 instrumental methods used most widely. Residue data are presented for some typical bromine-containing samples.

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