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.

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.

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.

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.

Collaborative Study of Minerals in Feeds by Atomic Absorption Spectrophotometry

1968 ◽  
Vol 51 (4) ◽  
pp. 776-779 ◽  
Author(s):  
Mary Heckman
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Mineral Mixture ◽  
Determination Of Copper ◽  
Feed Samples

Abstract Eleven laboratories collaboratively studied the analysis of feeds for zinc, manganese, iron, and copper by atomic absorption spectrophotometry. Five feeds and one mineral mixture were analyzed. The feed samples were prepared by both dry ashing and wet digestion. Samples were analyzed chemically for manganese and iron. Results indicate the method is suitable for zinc, manganese, and iron. Further work is needed on the determination of copper. The method for atomic absorption analysis of feeds for calcium and magnesium (recommended too late for action in 1966) and the method for zinc, manganese, and iron are recommended for adoption as official, first action.

Determination of Minor Nutrients in Fertilizers by Atomic Absorption Spectrophotometry

1965 ◽  
Vol 48 (2) ◽  
pp. 406-412
Author(s):  
C H McBride
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Raw Materials ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Collaborative Tests ◽  
Minor Nutrients ◽  
Determination Of Copper

Abstract A general atomic absorption spectrophotometric method for the determination of copper, iron, magnesium, manganese, and zinc in commercial fertilizers and raw materials is presented. The method has been subjected to ruggedness and collaborative tests and is shown to be simple, rapid, and acceptably precise. Its adoption as official, first action is recommended.

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.

Atomic Absorption Spectrophotometric Method for Determination of Water-Soluble Copper in Water-Insoluble Copper Fungicides: CIPAC Collaborative Study. Comparison with Bathocuproine Method

1981 ◽  
Vol 64 (1) ◽  
pp. 75-78
Author(s):  
F Sánchez Rasero ◽  
◽  
P G Balayannis ◽  
H P Beyers ◽  
E Celma ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
The United States ◽  
Atomic Absorption Spectrophotometry ◽  
Water Soluble ◽  
Absorption Spectrophotometry ◽  
Aas Method ◽  
Standard Deviations ◽  
The Difference

Abstract An atomic absorption spectrophotometric (AAS) method was collaboratively studied by 8 laboratories from Africa, the United States, Australia, and Europe. The samples were dispersed in deionized water. After centrifuging and filtering, the water-soluble copper in the filtrate was acidified and measured by atomic absorption spectrophotometry, in an airacetylene flame, at 324.7 nm. The results from 7 laboratories were satisfactory and no unfavorable comments were received. Repeatability standard deviations ranged from 0.005 to 0.023, and reproducibility standard deviations ranged from 0.012 to 0.062. When compared with the bathocuproine method, the difference in bias between both methods is not significant. They were both adopted as full CIPAC methods, with the bathocuproine method as the referee method. Both methods have been adopted official first action.

Determination of Mercury in Food Products and Biological Fluids by Aeration and Flameless Atomic Absorption Spectrophotometry

1971 ◽  
Vol 54 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Virginia A Thorpe
Keyword(s):  
Atomic Absorption ◽  
Biological Fluids ◽  
Food Products ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Flameless Atomic Absorption ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Mercury In Fish

Abstract This paper describes a simple, rapid modification of a method developed at the Fisheries Research Board of Canada for determining mercury in fish and other food products. Wet digestion and flameless techniques of atomic absorption spectrophotometry are used. Replicate analyses on different days showed good precision and samples spiked with known amounts of mercury showed adequate recovery.

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