Standard reference materials and data quality assurance in the biomedical analysis of trace elements

1996 ◽  
Vol 52 (3) ◽  
pp. 263-272 ◽  
Author(s):  
Mario Gallorini ◽  
Piero Apostoli
Keyword(s):  
Trace Elements ◽  
Quality Assurance ◽  
Data Quality ◽  
Reference Materials ◽  
Standard Reference Materials ◽  
Biomedical Analysis

Analysis of Botanical Standard Reference Materials by Cathode Ray Polarography

1972 ◽  
Vol 55 (5) ◽  
pp. 1109-1113
Author(s):  
E June Maienthal
Keyword(s):  
Trace Elements ◽  
Reference Materials ◽  
Sodium Diethyldithiocarbamate ◽  
Standard Reference Materials ◽  
National Bureau ◽  
Nickel Lead

Abstract The need for certified botanical and biological standards both in research and in industrial and field applications is leading to the development and production of a number of new Standard Reference Materials by the National Bureau of Standards. The first of these to be produced and certified is an orchard leaf standard. The determination of a number of important trace elements by cathode ray polarography was investigated and found to offer considerable advantages in sensitivity and accuracy over many other techniques. In addition, several elements may be determined simultaneously in the same solution. The methods were developed and applied to the analysis and certification of nickel, lead, bismuth, and iron in the orchard leaves. Results were also obtained for aluminum which has not yet been certified. Nickel was determined on 1 g samples after extraction with dimethylglyoxime and CHCI3. Lead and bismuth were determined concurrently on 1 g samples after a sodium diethyldithiocarbamate separation. Iron and aluminum were determined on 0.25 g samples after cupferron separations. Details of the methods are given and the results are compared with those obtained by other techniques.

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