Comparison of flameless atomic absorption spectrophotometry and anodic stripping voltammetry for the determination of blood lead

1987 ◽  
Vol 35 (1) ◽  
pp. 70-82 ◽  
Author(s):  
S. Costantini ◽  
R. Giordano ◽  
M. Rubbiani
Keyword(s):  
Atomic Absorption ◽  
Anodic Stripping Voltammetry ◽  
Blood Lead ◽  
Stripping Voltammetry ◽  
Atomic Absorption Spectrophotometry ◽  
Flameless Atomic Absorption ◽  
Absorption Spectrophotometry ◽  
Anodic Stripping

Determination of Lead in Evaporated Milk by Atomic Absorption Spectrophotometry and Anodic Stripping Voltammetry: Collaborative Study

1973 ◽  
Vol 56 (5) ◽  
pp. 1246-1251
Author(s):  
John A Fiorino ◽  
Robert A Moffitt ◽  
Albert L Woodson ◽  
Raymond J Gajan ◽  
Glen E Huskey ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Anodic Stripping Voltammetry ◽  
Collaborative Study ◽  
Stripping Voltammetry ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Coefficients Of Variation ◽  
Anodic Stripping ◽  
Ppm Level

Abstract A method for the determination of lead in evaporated milk was successfully collaborated by 11 laboratories. Five laboratories used both atomic absorption spectrophotometry (AAS) and anodic stripping voltammetry (ASV) for the determination, 5 used only the atomic absorption method, and 1 used only the polarographic method. Each collaborator received 12 samples, 2 at each of the 5 different levels (0.06–0.95 ppm) and 2 practice samples with a known lead content. Both AAS and ASV were equally suitable for the determination of lead in the concentration range studied. The pooled variation between duplicate determinations was 0.0010 and 0.0016 for the AAS and ASV methods, respectively. For the AAS determinations the coefficients of variation (random error components) decreased from 43% at the lowest Pb level to 4% at the highest level. Although the ASV results did not show the same regularity of decreasing coefficients of variation with increasing Pb level, the coefficients of variation were acceptable: 28% at the 0.06 ppm level and 6% at the 0.22 ppm level. The AAS method has been adopted as official first action and the ASV method as interim official first action.

Lead in Evaporated Milk by Anodic Stripping Voltammetry and Atomic Absorption Spectrophotometry: Cooperative Interlaboratory Study

1978 ◽  
Vol 61 (4) ◽  
pp. 931-936
Author(s):  
Arlene M Sulek ◽  
Edgar R Elkins ◽  
Eric W Zink
Keyword(s):  
Atomic Absorption ◽  
Anodic Stripping Voltammetry ◽  
Lead Level ◽  
Stripping Voltammetry ◽  
Atomic Absorption Spectrophotometry ◽  
Double Blind ◽  
Absorption Spectrophotometry ◽  
Anodic Stripping ◽  
Normal Variability

Abstract The results of a cooperative study on the determination of lead in evaporated milk, using a double blind referee technique, are reported. This study was designed to determine the normal variability of methods currently used for lead analysis by canned food industry laboratories. Twenty-three laboratories participated in this study. Each laboratory was instructed to use atomic absorption spectrophotometry (AOAC 25.065), anodic stripping voltammetry, or carbon rod atomic absorption spectrophotometry. Overall, the results appear to be in close agreement with the spiking levels. The coefficient of variation for all laboratories was 36.0% at the 0.15 ppm lead level and 16.8% at the 0.40 ppm lead level.

scholarly journals A Comparison of Two Methods for the Determination of Thallium in Urine

1983 ◽  
Vol 20 (5) ◽  
pp. 321-326 ◽  
Author(s):  
G J H Bessems ◽  
L W Westerhuis ◽  
H Baadenhuijsen
Keyword(s):  
Solvent Extraction ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Extraction Step ◽  
Analytical Recovery ◽  
Anodic Stripping

Two analytical procedures for the determination of thallium in urine are evaluated and compared. The two methods consist of differential pulse anodic stripping voltammetry and flameless atomic absorption spectrophotometry. Both procedures correlated well and were found to be acceptable in terms of precision and analytical recovery. However, a solvent extraction step proved to be necessary for the AAS procedure, and the linearity with respect to the concentration range was rather limited. The method based on DPASV is simple, accurate, precise, and sensitive and does not require any pretreatment of the sample. We therefore recommend the voltammetric procedure for the determination of thallium in urine, as described in this paper.

Lead in Preserved Duck Eggs: Field Screening Test and Confirmation and Quantitation by Atomic Absorption Spectrophotometry and Anodic Stripping Voltammetry

1981 ◽  
Vol 64 (4) ◽  
pp. 1014-1016 ◽  
Author(s):  
Benjamin Krinitz ◽  
Nivia Tepedino
Keyword(s):  
Atomic Absorption ◽  
Anodic Stripping Voltammetry ◽  
Lead Level ◽  
Stripping Voltammetry ◽  
Atomic Absorption Spectrophotometry ◽  
Field Screening ◽  
Absorption Spectrophotometry ◽  
Laboratory Confirmation ◽  
Anodic Stripping ◽  
Egg Albumen

Abstract Analysis of preserved duck eggs in this laboratory by acid digestion and atomic absorption spectrophotometry has shown that addition of lead salts to the egg coating to speed the preservation process results in lead in the egg albumen and yolk. The lead levels decrease as the lead passes through successive membranes, i.e., the lead level in the yolk is lower than that in the albumen. A method has been developed for the field screening of preserved duck eggs for the presence of lead in which a portion of the egg coating is shaken with 4% acetic acid, and the resulting solution is tested by a modification of the AOAC dithizone method. A quantitative method for laboratory confirmation of lead in egg albumen and/or yolk has also been developed in which lead is determined by atomic absorption spectrophotometry or anodic stripping voltammetry after closed-system Tefloncup digestion with nitric acid.

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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