scholarly journals Flow injection systems with a stream splitting and a dialysis unit for the soil analysis of sodium and potassium by flame emission spectrometry, and calcium and magnesium by atomic absorption spectrophotometry

1995 ◽  
Vol 26 (1-2) ◽  
pp. 183-195 ◽  
Author(s):  
Alexandra M. R. Ferreira ◽  
António O. S. S. Rangel ◽  
José L. F. C. Lima
Keyword(s):  
Atomic Absorption ◽  
Flow Injection ◽  
Soil Analysis ◽  
Atomic Absorption Spectrophotometry ◽  
Emission Spectrometry ◽  
Dialysis Unit ◽  
Absorption Spectrophotometry ◽  
Flame Emission ◽  
Calcium And Magnesium ◽  
Sodium And Potassium

Collaborative Study of Copper, Sodium, and Potassium in Feeds by Atomic Absorption Spectrophotometry and Sodium and Potassium by Flame Emission Spectrophotometry

1970 ◽  
Vol 53 (5) ◽  
pp. 923-925 ◽  
Author(s):  
Mary Heckman
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Flame Emission ◽  
Sodium And Potassium ◽  
Feed Samples

Abstract Twelve laboratories collaborated in a study of the analysis of feeds for copper, sodium, and potassium by atomic absorption spectrophotometry and for sodium and potassium by flame emission spectrophotometry. Solutions of feed samples containing known additions of the elements under study were analyzed. Results indicate that the atomic absorption method is suitable for copper. Further study is required for sodium and potassium.

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.

Estimation of Calcium, Magnesium, and Phosphorus in Diet and Stool

1969 ◽  
Vol 15 (8) ◽  
pp. 669-679 ◽  
Author(s):  
H Husdan ◽  
A Rapoport
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Kjeldahl Flask ◽  
Calcium Magnesium ◽  
Calcium And Magnesium ◽  
Precision And Accuracy

Abstract A procedure that is simple and convenient for general use for the estimation of calcium, magnesium, and phosphorus in diet and stool is described. It includes a HNO3—HClO4 digestion in a micro-Kjeldahl flask. Calcium subsequently may be estimated by atomic absorption spectrophotometry or by the Clark-Collip procedure, magnesium by atomic absorption spectrophotometry, and phosphorus by the method of Fiske and SubbaRow. Chromium, used as a focal collection marker, does not interfere in the measurement of calcium and magnesium, whereas the measurement of phosphorus requires a preliminary ketone extraction of the chromium. The precision and accuracy of the procedure have been evaluated and found to be quite satisfactory.

Increased AutoAnalyzer Dialysis of Calcium and Magnesium in Presence of Protein

1971 ◽  
Vol 17 (7) ◽  
pp. 614-621 ◽  
Author(s):  
John A Lott ◽  
Thomas S Herman
Keyword(s):  
Aqueous Solutions ◽  
Atomic Absorption ◽  
Protein Content ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Magnesium Salts ◽  
Calcium And Magnesium

Abstract We have studied calcium and magnesium determination with the AutoAnalyzer, using dialysis, and measurement by atomic absorption spectrophotometry. The fraction of calcium and magnesium that dialyzes is proportional to the protein content of the sample; therefore an error is introduced when aqueous solutions of calcium or magnesium salts are used as standards. Apparently, the presence of proteins causes increased dialysis of Ca+2 and Mg+2.

Sign in / Sign up

Export Citation Format

Share Document