Atomic Absorption Spectrophotometry of Iron and Aluminum in Baking Powders

1970 ◽  
Vol 53 (4) ◽  
pp. 877-879
Author(s):  
Walter Holak
Keyword(s):  
Organic Matter ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
Average Recovery ◽  
Absorption Spectrophotometry ◽  
Aluminum Recovery ◽  
Relative Standard ◽  
The Matrix ◽  
Analytical Range

Abstract In an atomic absorption method for iron and aluminum in baking powders, organic matter is destroyed with a mixture of H2SO4-30% H2O2, the sample is diluted to within analytical range, and absorption of each element is measured. Concentrations are obtained from calibration curves prepared from standards diluted in the presence of H2SO4 and alarge amount of alkali; the former compensates for the matrix differences and the latter suppresses the ionization of aluminum. Recovery studies with commercially manufactured baking powders to which known amounts of the elements were added indicate that the method is free of interferences for these products. Average recovery and the relative standard deviation for iron and aluminum are 100.4±1.3% and 98.7±1.8%, respectively.

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.

Reliable determination of copper complex ions in synthetic wastewater using flame atomic absorption spectrophotometry

2019 ◽  
Vol 79 (5) ◽  
pp. 833-841 ◽  
Author(s):  
Kanokporn Supong ◽  
Parnuwat Usapein
Keyword(s):  
Atomic Absorption ◽  
Copper Complexes ◽  
Atomic Absorption Spectrophotometry ◽  
Synthetic Wastewater ◽  
Flame Atomic Absorption Spectrophotometry ◽  
Working Standard ◽  
Absorption Spectrophotometry ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Delay Times

Abstract Forms of copper that are highly soluble in aquatic environments are used as chemical reagents in a variety of industries, especially copper complexes. Wastewater containing copper complexes can be difficult to treat and analyse. Normally, flame atomic absorption spectrophotometry (FAAS) is a favourable technique for analysing metal ions in wastewater, but is less reliable for copper analysis owing to the influence of copper oxides. To solve this problem, it is necessary to adjust the atomization and delay times. The objective of this study was to use FAAS to accurately determine the quantity of complexed copper in synthetic wastewater, using increased atomization and delay times. The method showed excellent linearity in the copper standard concentration range of 1–5 mg L−1. The sensitivity of the analysis was 0.023 mg L−1. The percentage of recovery and the relative standard deviation were 85.02% and 0.75%, respectively. The experimental results demonstrated that the estimation of uncertainty from preparation of working standard, repeatability uncertainty, instrument deviation, calibration curve and recovery uncertainty were 8.2 × 10−4, 4.49 × 10−4, 7.21 × 10−4, 21.25 × 10−4, and 98.19 × 10−4, respectively. Overall, the results showed the suitability of the FAAS method for determining copper in synthetic wastewater.

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.

A sensitive high-temperature electrothermal atomic absorption analysis for Rb+ in erythrocytes and plasma of normal and hypertensive persons.

1985 ◽  
Vol 31 (2) ◽  
pp. 274-276 ◽  
Author(s):  
K F Hallis ◽  
N A Boon ◽  
C M Perkins ◽  
J K Aronson ◽  
D G Grahame-Smith
Keyword(s):  
Atomic Absorption ◽  
Healthy Subjects ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Analysis ◽  
Healthy Individuals ◽  
Absorption Spectrophotometry ◽  
Graphite Furnace Atomic Absorption ◽  
The Matrix

Abstract This method for determination of Rb+ in human plasma and erythrocytes by graphite-furnace atomic absorption spectrophotometry has a sensitivity of 29 nmol/L for plasma, 12 nmol/L for erythrocytes. The detection limit is 24 nmol/L for plasma, 4.8 nmol/L for erythrocytes. This assay is approximately 30-fold more sensitive than previously reported techniques involving atomic absorption spectrophotometry, enabling use of smaller samples. The rubidium signal is linear with concentration up to 1.2 mumol/L, and addition of other cations to the matrix produces only minor alterations in the Rb+ signal. We measured plasma and erythrocytic Rb+ concentrations in healthy subjects and in patients with untreated essential hypertension. In both, our values are similar to those previously reported for healthy individuals.

Atomic Absorption Spectrophotometric Method for Determination of Polydimethylsiloxane Residues in Pineapple Juice: Collaborative Study

1990 ◽  
Vol 73 (5) ◽  
pp. 721-723
Author(s):  
Robert D Parker
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Pineapple Juice ◽  
Absorption Spectrophotometry ◽  
Relative Standard ◽  
Standard Deviations

Abstract An atomic absorption spectrophotometric method for determination of polydimethylsiloxane (PDMS) residues In pineapple juice was collaboratively studied by 9 laboratories. PDMS residues are extracted from pineapple Juice with 4- methyl-2-pentanone and the extracted silicone Is measured by atomic absorption spectrophotometry using a nitrous oxide/ acetylene flame. Collaborators analyzed 5 samples Including 1 blind duplicate. Reproducibility relative standard deviations (RSDR) were 13.1% at 31 ppm, 6.9% at 18 ppm, 14.8% at 7.9 ppm, and 16.1 % at 4.9 ppm PDMS. The method has been approved Interim official first action by AOAC.

Precautions in Ashing Techniques for Lead Determination in Food

1982 ◽  
Vol 65 (4) ◽  
pp. 992-993
Author(s):  
Wayne Thornburg
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Lead Determination ◽  
Absorption Spectrophotometry ◽  
Dry Ashing ◽  
The Matrix ◽  
Wet Ashing

Abstract In determining lead in food, the matrix must be destroyed before quantitation by atomic absorption spectrophotometry. Wet or dry ashing techniques are generally used. Dry ashing assisted by ultrapure H2SO4 or K2SO4 has the advantages of safety, low reagent blanks, rapidity, and good recoveries of added lead. These techniques are also less laborintensive than wet ashing.

Carbon Rod Atomizer Applied to Measurement of Lead in Whole Blood by Atomic Absorption Spectrophotometry

1972 ◽  
Vol 18 (5) ◽  
pp. 410-412 ◽  
Author(s):  
N P Kubasik ◽  
M T Volosin ◽  
M H Murray
Keyword(s):  
Atomic Absorption ◽  
Whole Blood ◽  
Atomic Absorption Spectrophotometry ◽  
Rapid Analysis ◽  
Small Sample ◽  
Absorption Method ◽  
Lead In Blood ◽  
Absorption Spectrophotometry ◽  
Carbon Rod Atomizer ◽  
Whole Blood Sample

Abstract An atomic absorption method is described for determining lead in blood by means of the carbon rod atomizer. With the procedure, only a dilution of the whole blood sample is required, and results are comparable to those obtained by the more generally used atomic absorption flame technique. Advantages of the carbon rod include rapid analysis, simple sample preparation, and small sample volumes.

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.

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.

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.

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