Determination of elemental area concentration in ultrathin specimens by x-ray microanalysis and atomic absorption spectrophotometry

1976 ◽  
Vol 48 (9) ◽  
pp. 1316-1318 ◽  
Author(s):  
J. A. Chandler ◽  
M. S. Morton
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
X Ray ◽  
Absorption Spectrophotometry

Determination of Osmium by Atomic Absorption Spectrophotometry

1968 ◽  
Vol 22 (5) ◽  
pp. 532-535 ◽  
Author(s):  
T. W. Osolinski ◽  
N. H. Knight
Keyword(s):  
Atomic Absorption ◽  
Valence State ◽  
Slight Modification ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
X Ray ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Thiourea Complex

An atomic absorption method for the determination of osmium has been developed. The method is applicable in the concentration range of 1 to 300 ppm of osmium with a relative error of ±4%. It is applicable to both aqueous and nonaqueous osmium solutions and, with slight modification, can be applied to the determination of osmium in its thiourea complex. The results are not affected by the valence state of osmium. A sensitivity of 1 ppm is readily achieved by the atomic absorption method and this is comparable to that obtained by spectrophotometry and x-ray fluorescence. The method is rapid and requires less than 5 min of operator time per sample.

Determination of Minor Nutrients in Fertilizers by Atomic Absorption Spectrophotometry: Second Collaborative Study

1965 ◽  
Vol 48 (6) ◽  
pp. 1100-1103
Author(s):  
C H Mcbride
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Minor Nutrients

Abstract The atomic absorption method studied last year was re-examined and extended to include calcium and sodium. The procedures were submitted to 16 collaborators for determination of Ca, Cu, Fe, Mg, Mn, Na, and Zn. Results for Ca and Na were discouraging; further study is recommended.

Comparison of Methods for Determining Biuret in Urea

1979 ◽  
Vol 62 (1) ◽  
pp. 153-159
Author(s):  
Luis F Corominas ◽  
Victor M Boy ◽  
Manuel Guijosa
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Determination ◽  
Atomic Absorption Spectrophotometry ◽  
International Organization ◽  
Comparison Of Methods ◽  
Definite Advantage ◽  
Absorption Spectrophotometry ◽  
Alternative Procedures ◽  
Aoac Method

Abstract The official first action AOAC method for the spectrophotometric determination of biuret in urea, 2.072—2.074, was compared with official first action AOAC method 2.C01-2.C03 (atomic absorption spectrophotometry), 2 simplified versions of 2.072-2.074, and modified versions of 2 alternative procedures of the International Organization for Standardization. Three synthetic urea samples (0.3, 1.4, and 3.0% biuret) and 1 commercial urea sample (1.0% biuret) were analyzed. The methods proved to be equivalent and none showed a definite advantage over 2.072-2.074. The purification of biuret and the interference by ammonia are also discussed.

Sign in / Sign up

Export Citation Format

Share Document