DETERMINATION OF TRACE ELEMENTS IN STREAM SEDIMENT AND SOIL SAMPLES IN THE LOWER LIMITS OF DETECTION BY ATOMIC ABSORPTION SPECTROPHOTOMETER

摘要

Geo-analytical studies have been carried out for the estimation of trace elements in stream sediment and soil (NGCM) samples to the lowest attainable limits of concentraction using atomic absorption spectrophotometer. It has been observed that, in order to determine the elements present in very low quantities, as the concentration of the sample in solution is increased, errors due to viscosity and interelemental interferences increase. It is very difficult to determine these elements with accuracy by atomic absorption spectrophotometer by normal method using pure standard solutions for calibration of the instrument. Attempts were made to minimise the errors due to these interferences by using matrix matching standards and background corrector.