Preconcentration of cadmium, copper, lead, and zinc in water at the 10-12 g/g level by adsorption onto tungsten wire followed by flameless atomic absorption spectrometry

1981 ◽  
Vol 53 (11) ◽  
pp. 1566-1570 ◽  
Author(s):  
Eric W. Wolff ◽  
Michael P. Landy ◽  
David A. Peel
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Tungsten Wire ◽  
Absorption Spectrometry ◽  
Flameless Atomic Absorption ◽  
Lead And Zinc ◽  
Flameless Atomic Absorption Spectrometry ◽  
Copper Lead

Interlaboratory comparisons of nickel analyses in urine by atomic absorption spectrometry.

1978 ◽  
Vol 24 (6) ◽  
pp. 862-867 ◽  
Author(s):  
D B Adams ◽  
S S Brown ◽  
F W Sunderman ◽  
H Zachariasen
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Analytical Techniques ◽  
Absorption Spectrometry ◽  
Direct Analysis ◽  
Urine Samples ◽  
Analytical Sensitivity ◽  
Flameless Atomic Absorption ◽  
Dry Ashing ◽  
Flameless Atomic Absorption Spectrometry

Abstract Two interlaboratory surveys of urine nickel analyses were performed in which eight or nine urine samples were distributed to laboratories in seven nations for measurements of nickel concentrations by atomic absorption spectrometry. In both surveys, wide discrepancies were observed in the values for urine nickel concentrations that were obtained in different laboratories by various analytical methods. This finding documents a serious need for improvement in the proficiency of nickel analyses. Nonetheless, excellent interlaboratory concordance was found in the rankings of urine samples in order of increasing nickel concentrations. Analytical techniques that involved preliminary wet or dry ashing and extration steps before flameless atomic absorption spectrometry were generally superior to techniques for direct analysis of urine by flameless atomic absorption spectrometry in respect to (a) analytical sensitivity, (b) recovery of added nickel, (c) interlaboratory precision, and (d) interlaboratory concordance of ranking of urine samples in order of increasing nickel concentrations.

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