DETERMINATION OF CADMIUM BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY USING PALLADIUM AND TARTARIC ACID AS A MIXED CHEMICAL MODIFIER AND A TUNGSTEN-FOIL PLATFORM WITH THE POSSIBILITY OF STANDARDLESS ANALYSIS
Yz. Ma et al., DETERMINATION OF CADMIUM BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY USING PALLADIUM AND TARTARIC ACID AS A MIXED CHEMICAL MODIFIER AND A TUNGSTEN-FOIL PLATFORM WITH THE POSSIBILITY OF STANDARDLESS ANALYSIS, Journal of analytical atomic spectrometry, 9(6), 1994, pp. 679-683
Palladium and tartaric acid as a mixed chemical modifier is a better m
odifier for the determination of Cd in complex environmental samples t
han Pd and tartaric acid (or ascorbic acid) used as separate modifiers
. The mixed modifier can effectively eliminate matrix effects and the
two peak signals observed in the atomization of complex environmental
samples. It has also been found that a W-foil platform has a longer li
fetime than a Ta-foil platform. A comparison of the calculated and exp
erimental values obtained for the characteristic mass, m0, with a W-fo
il platform in a pyrolytic graphite coated graphite tube using a mixed
modifier shows that an atomization temperature higher than T(set) = 1
673 K and T(effective) = 1530 K can be used for the determination of C
d. Quantitative analytical data for Cd in sea-water and in solutions o
f reference materials (pork liver, wheat powder, peach leaf, tea leaf,
tea tree leaf, cabbage, water sediments, coal fly ash, soils and rock
) by standardless analysis are presented (LOD = 0.3pg; RSD<5%).