The direct determination of mercury by atomic-absorption spectrophotometry at 184·9 nm by using a nitrogen-separated nitrous oxide-acetylene flame

The Analyst ◽  
1973 ◽  
Vol 98 (1162) ◽  
pp. 49 ◽  
Author(s):  
G. F. Kirkbright ◽  
T. S. West ◽  
P. J. Wilson
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Direct Determination ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry

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.

Direct Determination of Nickel in Catalytic-Cracking Feedstocks by Atomic-Absorption Spectrophotometry

1966 ◽  
Vol 20 (4) ◽  
pp. 212-213 ◽  
Author(s):  
J. D. Kerber
Keyword(s):  
Detection Limit ◽  
Atomic Absorption ◽  
Catalytic Cracking ◽  
Direct Determination ◽  
Atomic Absorption Spectrophotometry ◽  
Rapid Testing ◽  
Absorption Spectrophotometry ◽  
Determination Of Nickel ◽  
No Sample Preparation

Nickel in catalytic-cracking feedstocks is determined by atomic-absorption spectrophotometry with no sample preparation other than dilution in p–xylene. A modification of the method of additions permits rapid testing with a detection limit of 0.05 ppm Ni and a precision of 0.05 ppm.

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