Elemental analysis of the marine biological reference material LUTS-1 by instrumental neutron activation, graphite furnace atomic absorption spectroscopy, and anodic stripping voltammetry

1990 ◽  
Vol 68 (5) ◽  
pp. 735-740 ◽  
Author(s):  
Norine Motkosky ◽  
Angelo Ransirimal Fernando ◽  
Byron Kratochvil
Keyword(s):  
Neutron Activation Analysis ◽  
Reference Material ◽  
Neutron Activation ◽  
Graphite Furnace ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Biological Reference Material ◽  
Marine Biological ◽  
Graphite Furnace Atomic Absorption ◽  
Anodic Stripping

Marine biological reference material LUTS-1, lobster heptopancreas, was analyzed for elemental homogeneity using graphite furnace atomic absorption, anodic stripping voltammetry, and neutron activation analysis. Analysis of samples taken from 12 bottles of LUTS-1 bottled on two different days showed no statistical differences at the 95% confidence level for within-bottle variance for a large number of elements. Differences were observed for between-day variances for aluminum, iron, cobalt, sodium, chlorine, bromine, and iodine, but not at a level sufficient to affect utility as a reference material. Keywords: neutron activation analysis, graphite furnace atomic absorportion spectroscopy, anodic stripping voltammetry, elemental analysis, marine biological reference material.

scholarly journals Determination of trace aluminum concentration and homogeneity in biological reference material TORT-1 by instrumental neutron activation analysis and graphite furnace atomic absorption spectroscopy

1987 ◽  
Vol 65 (5) ◽  
pp. 1047-1050 ◽  
Author(s):  
Byron Kratochvil ◽  
Norine Motkosky ◽  
M. John M. Duke ◽  
Dennis Ng
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Reference Material ◽  
Neutron Activation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Graphite Furnace ◽  
Graphite Furnace Atomic Absorption

The biological reference material TORT-1, lobster hepatopancreas, was analyzed for aluminum by instrumental neutron activation analysis (INAA) and graphite furnace atomic absorption spectroscopy (GFAAS). After correction of the INAA results for interferences from 28Al produced by 31P(n,α)28Al and 28Si(n,p)28Al reactions, and use of HNO3 plus HF for sample dissolution for the GFAAS analyses, the methods gave similar results of 43 ± 3 and 42 ± 2 μg/g respectively for 200 to 300-mg test portions. Analysis of six portions from each of six bottles of TORT-1 showed no statistical difference at the 95% confidence level for the between and within bottle variances. Therefore, the material can be considered homogeneous for aluminum if 200- to 300-mg test portions are taken. The variance was greater and the average lower when 30-mg test portions were analyzed for aluminum by GFAAS. The pattern of the results, together with the need for HF in the dissolution procedure, suggests the presence of aluminum-containing microparticulate mineral matter, perhaps silicate material, in the material.

Measurement of plant-available cadmium in New Zealand soils

Soil Research ◽  
1996 ◽  
Vol 34 (3) ◽  
pp. 441 ◽  
Author(s):  
P Andrews ◽  
RM Town ◽  
MJ Hedley ◽  
P Loganathan
Keyword(s):  
New Zealand ◽  
Graphite Furnace ◽  
Anodic Stripping Voltammetry ◽  
Agricultural Practices ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Graphite Furnace Atomic Absorption ◽  
Anodic Stripping

Several methods of measuring plant-available cadmium (Cd) were compared using soils that had accumulated Cd under normal New Zealand agricultural practices (low total Cd concentrations, and phosphatic fertiliser as the dominant Cd source). The study encompassed 9 New Zealand soils with different Cd input histories. Cadmium was extracted from these soils by demineralised water, 0.05 M Na2EDTA, 1 M NH4OAC (pH 7), 0.01 M CaCl2, and 0.05 M CaCl2 and quantified by differential pulse anodic stripping voltammetry (DP-ASV) and graphite furnace atomic absorption spectrophotometry (AAS). The DP-ASV measures the free Cd ion and that associated with labile complexes, but not large organic Cd complexes. Extractable Cd levels were compared with those which are plant-available, as determined by pot studies (lettuce). The 0.01 M CaCl2-extractable Cd measured by AAS and 0.05 M CaCl2-extractable Cd measured by DP-ASV gave the best estimate of plant availability of Cd.

Electrochemical determination of low blood lead concentrations with a disposable carbon microarray electrode

1995 ◽  
Vol 41 (4) ◽  
pp. 557-563 ◽  
Author(s):  
B J Feldman ◽  
A D'Alessandro ◽  
J D Osterloh ◽  
B H Hata
Keyword(s):  
Graphite Furnace ◽  
Anodic Stripping Voltammetry ◽  
Blood Lead ◽  
Standard Addition ◽  
Stripping Voltammetry ◽  
Electrochemical Determination ◽  
Graphite Furnace Atomic Absorption ◽  
Order Of Magnitude ◽  
S Deposition

Abstract Lead concentrations in blood samples typical of unexposed individuals are determined by using square-wave anodic stripping voltammetry at a disposable 287-element (15-35-microns diameter) carbon microarray electrode. Analysis of a series of low Pb-containing samples (blood [Pb] = 17 to 92 micrograms/L) by standard addition gives good accuracy (average bias vs graphite furnace atomic absorption spectroscopy = -4 micrograms/L) and precision (pooled SD = 7 micrograms/L). The signal/noise ratio is improved by about an order of magnitude over that found at a single carbon disk (10 microns diameter), resulting in a detection limit (for the microarray) of 5 micrograms/L for a 60-s deposition of sample.

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