Accurate determination of calcium stearate by atomic absorption spectrophotometric method in polymer

2008 ◽  
Vol 108 (4) ◽  
pp. 2638-2643
Author(s):  
Mir Ali Farajzadeh ◽  
Mahboobe Ghorbani Ravandi ◽  
Ali Ranji ◽  
Elham Feyz
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Accurate Determination ◽  
Calcium Stearate

scholarly journals DETERMINATION OF THE METAL CONTENT IN SOME FLOURS AND PASTES OBTAINED FROM DIFFERENT WHEAT SPECIES

1970 ◽  
Vol 62 ◽  
Author(s):  
Nicoleta Diana Raba ◽  
Iosif Gherhen ◽  
Florina Furdi
Keyword(s):  
Triticum Aestivum ◽  
Atomic Absorption ◽  
Spectrophotometric Method ◽  
Triticum Durum ◽  
Metal Content ◽  
Wheat Species ◽  
Triticum Spelta ◽  
Basic Composition ◽  
Different Types

In the present paper, we followed to determine the metal content in some different types of flour obtained from different wheat species, and in several pastes that contain flour made out of the Triticum aestivum, Triticum durum si Triticum spelta wheat species in their basic composition. In order to do this we have analyzed 10 samples: 2 flours and 8 pastes harvested from random stores, belonging to different local and foreign manufacturers. In the same time, we tryed to identify the wheat species used to produce the pastes, analyzing them depending on the metal content. The determination has been realysed using the atomic absorption spectrophotometric method, the analyzed metals being: Cu, Zn, Mn, Fe, Ca, Mg, K şi Na.

Development of an UV-Vis Spectrophotometric Method for Accurate Determination of Aqueous Sulphides in Exotic Scale Studies

2018 ◽  
Author(s):  
Y. Alduailej ◽  
L. S. Boak ◽  
B. Alharbi ◽  
A. J. Graham ◽  
K. S. Sorbie ◽  
...  
Keyword(s):  
Spectrophotometric Method ◽  
Accurate Determination

K, Ca, Mg, and Zn in platelets, as determined by atomic absorption spectrometry with use of a sealed decomposition bomb and discrete nebulization.

1985 ◽  
Vol 31 (4) ◽  
pp. 609-612 ◽  
Author(s):  
T Makino
Keyword(s):  
Metal Ions ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Accurate Determination ◽  
Absorption Spectrometry ◽  
New Method ◽  
Differential Centrifugation ◽  
Individual Variations

Abstract In this new method for precise and accurate determination of K, Ca, Mg, and Zn in platelets, small amounts of platelets, prepared by differential centrifugation and cell washing, are decomposed in a homemade mini-vessel, a sealed Teflon bomb. The metal ions in the decomposed sample are measured by atomic absorption spectrometry with discrete nebulization. Overall, CVs ranged from 0.8 to 4.8%. We investigated sex-related differences (none were found) and intra-individual variations.

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.

scholarly journals Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption Spectrometry

2011 ◽  
Vol 62 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Blanka Tariba ◽  
Alica Pizent ◽  
Zorana Kljaković-Gašpić
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Accurate Determination ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
White Wine ◽  
Matrix Modifier ◽  
Graphite Furnace Atomic Absorption

Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption SpectrometryA method has been developed for direct determination of lead in wine by graphite furnace atomic absorption spectrometry (GFAAS) with Zeeman-effect background correction. The thermal behaviour of Pb during pyrolysis and atomisation stages was investigated without matrix modifier and in the presence of Pd(NO3)2, Pd(NO3)2+ Mg(NO3)2× 6H2O, and NH4H2PO4+ Mg(NO3)2× 6H2O as matrix modifiers. A simple 1:1 dilution of wine samples with Pd(NO3)2as a matrix modifier proved optimal for accurate determination of Pb in wine. Mean recoveries were 106 % for red and 114 % for white wine, and the detection limit was 3 μg L-1. Within-run precision of measurements for red and white wine was 2.1 % and 1.8 %, respectively. The proposed method was applied for analysis of 23 Croatian wines. Median Pb concentrations were 33 μg L-1, range (16 to 49) μg L-1in commercially available wines and 46 μg L-1, range (14 to 559) μg L-1in home-made wines. There were no statistically significant differences (P<0.05) in Pb concentration between commercial and home-made wines or between red and white wines.

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.

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