Determination of microquantities of Fe, Mg, Ca, Cu, and Pb in lanthanoid minerals by atomic absorption spectrophotometry

1980 ◽  
Vol 45 (3) ◽  
pp. 715-719
Author(s):  
Anna Sopková ◽  
Katarína Radváková
Keyword(s):  
Atomic Absorption ◽  
Anion Exchanger ◽  
Atomic Absorption Spectrophotometry ◽  
Minor Elements ◽  
Absorption Spectrophotometry ◽  
Model Solutions ◽  
Accuracy And Precision ◽  
Calcium And Magnesium ◽  
Copper Lead

The decomposition of two lanthanoid minerals, viz fluorocarbonate bastnasite and phosphate monazite, is described. Iron present in the solution obtained is removed on anion exchanger. Atomic absorption spectrophotometry was applied to the determination of the minor elements present in the mineral, viz. copper, lead, calcium and magnesium. The measurement conditions for the determination of these elements in microquantities were established by using model solutions, and the accuracy and precision of determination were evaluated.

The determination of chromic oxide in faeces samples by atomic absorption spectrophotometry

1962 ◽  
Vol 59 (3) ◽  
pp. 381-385 ◽  
Author(s):  
C. H. Williams ◽  
D. J. David ◽  
O. Iismaa
Keyword(s):  
Atomic Absorption ◽  
Chemical Method ◽  
Atomic Absorption Spectrophotometry ◽  
Test Solution ◽  
Chromic Oxide ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Calcium And Magnesium

A rapid and accurate atomic absorption method for the determination of chromium in faeces samples from pasture experiments using chromic oxide ‘markers’ is described. Of the elements present after ashing and digesting the samples in a phosphoric acid—manganese sulphate—potassium bromate solution silicate, aluminium, calcium and magnesium were found to interfere in the determination. The effects of these interferences were overcome by the addition of calcium to the test solution and by the addition of silicate to the standards, which were prepared in ‘blank’ solutions.The sensitivities of a number of alternate chromium resonance lines relative to that of Cr 3578·7 Å. are given. These lines may be used to increase the concentration range of the analysis.The results of a comparison of the atomic absorption method with a chemical method are given.

Determination of Calcium and Magnesium in Serum, Urine, Diet, and Stool by Atomic Absorption Spectrophotometry

1967 ◽  
Vol 13 (3) ◽  
pp. 204-214 ◽  
Author(s):  
Elizabeth G Gimblet ◽  
Amy F Marney ◽  
Roy W Bonsnes
Keyword(s):  
Atomic Absorption ◽  
Clinical Chemistry ◽  
Atomic Absorption Spectrophotometry ◽  
Chemistry Laboratory ◽  
Absorption Spectrophotometry ◽  
Clinical Chemistry Laboratory ◽  
Calcium And Magnesium

Abstract Atomic absorption spectrophotometry was evaluated as a method for the determination of calcium and magnesium in serum, urine, diet, and stool, and was found a most suitable technic for a large clinical chemistry laboratory.

Minerals in Feeds by Atomic Absorption Spectrophotometry

1967 ◽  
Vol 50 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Mary Heckman
Keyword(s):  
Sample Preparation ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Mineral Mixture ◽  
Calcium Magnesium ◽  
Calcium And Magnesium

Abstract Seventeen laboratories collaborated in the study of analysis of feeds for calcium, magnesium, zinc, manganese, iron, and copper by atomic absorption spectrophotometry. Six feeds and one mineral mixture were analyzed; both dry ashing and wet digestion were used to prepare samples. Three feeds were in the form of solutions to eliminate sample preparation as a variable. Strontium and lanthanum were added to the feed to eliminate phosphorus interference and results were compared. Results indicate that the method is suitable for calcium and magnesium. Further work is needed on the determination of zinc, manganese, iron, and copper.

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