Study on memory effect for urine bioassay by ion exchange chromatography column method

Plutonium spiked study in urine samples of non-radiation workers was carried out to assess and quantify the memory effect of radio-analytical procedure involving ion exchange resin separation, electro-deposition procedure and counting by alpha spectrometry consisting of PIPS detectors. The paper deals with the study on memory effect for urine bioassay by ion exchange column chromatography method on repeated use and was established by performing reagent blank urine sample spiked with ²³⁶Pu tracer. Average memory effect of 0.5% with a range of 0.4% to 0.6% for the radio-analytical procedure has been established at our laboratory. The minimum detectable activity (MDA) of the system was 0.25 mBq for a counting duration of 4 days. (author)