Direct Determination of Potash in Fertilizers by Atomic Absorption Spectrophotometry

1973 ◽  
Vol 56 (1) ◽  
pp. 147-150
Author(s):  
Virginia A Thorpe
Keyword(s):  
Atomic Absorption ◽  
Direct Determination ◽  
Atomic Absorption Spectrophotometry ◽  
Available Phosphorus ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Scale Expansion

Abstract A rapid atomic absorption method is presented for the direct determination of potash in fertilizers, using the extract prepared for available phosphorus without dilution. By using the secondary potassium line and scale expansion, sensitive linear curves were obtained for 100–1000 ppm, covering K2O guarantees in all fertilizers.

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.

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 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.

Collaborative Study of the Determination of Iron and Aluminum in Baking Powder by Atomic Absorption Spectrophotometry

1972 ◽  
Vol 55 (4) ◽  
pp. 684-685
Author(s):  
Walter Holak
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Interlaboratory Study ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry

Abstract Commercial halting powder and samples containing added iron and aluminum were subjected to an interlaboratory study. The iron and aluminum were determined by an atomic absorption method reported earlier. The results for aluminum were satisfactory (average recoveries of 98, 99, and 107% for 3 levels) and the method has been adopted as official first action for aluminum. The iron results are somewhat erratic and study will be continued.

Collaborative Study Using Atomic Absorption Spectrophotometry for the Determination of Copper in Alcoholic Products

1967 ◽  
Vol 50 (2) ◽  
pp. 338-339
Author(s):  
Duane H Strunk ◽  
A A Andreasen
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Absorption Method ◽  
Standard Curve ◽  
Absorption Spectrophotometry ◽  
Determination Of Copper

Abstract A collaborative study was conducted on the 'atomic absorption spectrophotometric method for measuring the concentration of copper in alcoholic products. In this method, the samples are aspirated directly into the burner of the instrument, and the absorhance values are converted to ppm copper by reference to a standard curve. Data show good precision and are comparable to those obtained by the ZDBT method. It is recommended that the atomic absorption method be adopted as official, first action.

Collaborative Study of a Method for the Atomic Absorption Spectrophotometric and Polarographic Determination of Cadmium in Food

1973 ◽  
Vol 56 (4) ◽  
pp. 876-881
Author(s):  
Raymond J Gajan ◽  
John H Gould ◽  
James O Watts ◽  
John A Fiorino
Keyword(s):  
Phase I ◽  
Atomic Absorption ◽  
Orange Juice ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
Acid Digestion ◽  
Absorption Spectrophotometry ◽  
Coefficients Of Variation

Abstract The method studied involves acid digestion, dithizone extraction, and determination by atomic absorption spectrophotometry and polarography. This study consisted of 2 phases, with 10 laboratories participating in Phase I and 15 laboratories in Phase II. The 12 commodities studied (lettuce, potatoes, orange juice, shredded wheat, milk, sugar, eggs, fish, frankfurters, rice, beans, and oysters) were spiked at 0.05, 0.1, 0.2, 0.4, 0.5, 1.0, 1.5, and 2.0 ppm cadmium. Only 3 collaborators submitted polarographic results. There were no statistically demonstrable differences for the atomic absorption method between spiking levels, commodities, or laboratories. Coefficients of variation were acceptable. The atomic absorption spectrophotometric method for determining cadmium has been adopted as official first action.

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