[Flameless atomic absorption spectrometry for analysis of trace elements in biological materials]

The variation factors of data using atomic absorption method are considered as follows: 1. Sampling 2. Contamination of glassware 3. Damaged cuvettes 4. Chemical interference by coexisting elements. Those problems of the variation factor are solved by checking and replacement of sample nozzle, glassware, and cuvettes. The chemical interferences are also removed by using platform and exhausting gas strongly inside of cuvettes, and keeping constant temperature of cuvettes when ashed. In addition to the above condition, the adjustment of background of choosing apparatus provide highly sensitive, accurate measurement without using standard adding method.