Determination of trace amounts of copper, zinc and magnesium in animal feeds by atomic-absorption spectrophotometry

The Analyst ◽  
1968 ◽  
Vol 93 (1102) ◽  
pp. 42 ◽  
Author(s):  
A. G. Roach ◽  
P. Sanderson ◽  
D. R. Williams
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Animal Feeds ◽  
Absorption Spectrophotometry ◽  
Copper Zinc

Determination of Zinc in Stock and Mixed Feeds by EDTA Extraction and Atomic Absorption Spectrophotometry

1970 ◽  
Vol 53 (6) ◽  
pp. 1190-1192
Author(s):  
Jax Tuŝl
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Animal Feeds ◽  
Absorption Spectrophotometry ◽  
Dry Ashing ◽  
Mixed Feeds ◽  
Edta Extraction

Abstract Zinc was extracted from various stock and mixed feeds by EDTA and then determined by atomic absorption spectrophotometry. The EDTA extraction was found to be almost as effective as the standard HNO3-HCIO4 digestion, but it was easier and more rapid. The method was preferable to dry ashing because considerable losses of zinc often occur in the latter method when animal feeds are analyzed.

Determination of Heavy Metals in Wines by Atomic Absorption Spectrophotometry

1968 ◽  
Vol 51 (4) ◽  
pp. 922-925
Author(s):  
J C Měranger ◽  
E Somers
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Analysis ◽  
Absorption Spectrophotometry ◽  
Nickel Chromium ◽  
Copper Zinc ◽  
Evaporation Stage ◽  
Zinc Nickel

Abstract The effect of alcohol and sugar concentration on the atomic absorption analysis of copper, zinc, nickel, chromium, lead, cadmium, and cobalt has been investigated. Sugar reduced the sensitivity of analysis but could be compensated for by using the method of additions. Interference from alcohol was avoided by introducing an evaporation stage, and the concentration of the above cations was determined by direct aspiration in 24 native and imported wines.

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.

Determination of calcium in natural water by atomic absorption spectrophotometry

1967 ◽  
Vol 1 (9) ◽  
pp. 721-724 ◽  
Author(s):  
Eugene M. Bentley ◽  
George Fred. Lee
Keyword(s):  
Atomic Absorption ◽  
Natural Water ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry
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