FIA-extraction applied to the limit test for heavy metals.
A method is presented that allows rapid determination of the total concentration of heavy metals in a sample. The method is based on FIA-extraction and photometric measurement of the metals as their dithiocarbamate complexes. The analytical parameters have been chosen such that the sensitivities for toxic elements are enhanced compared with those of less toxic heavy metals. The sampling capacity of the system is 40 samples h-1 and the repeatability (RSD) is 1.9% at 0.1 mg 1(-1). Raw materials for the production of pharmaceuticals as well as analytical grade salts and household commodities have been tested.
Danielsson
L G
LG
Department of Analytical Chemistry, Royal University of Technology, Stockholm, Sweden.
Zhao
H Z
HZ
D011232:Chemical Precipitation; D002623:Chemistry Techniques, Analytical / Q000379:methods; D004050:Ditiocarb; D008670:Metals / Q000032:analysis* / Q000506:poisoning; D012680:Sensitivity and Specificity
D008670:Metals; D004050:Ditiocarb