Analysis by Flameless Atomic Absorption.

摘要

The wire loop can be successfully used as an electrothermal atomizer for flameless atomic absorption spectroscopy and is competitive with carbon rod and carbon cup atomizers. The wire loop is slightly less sensitive than carbon atomizers but is much simpler and cheaper to operate. Although for some samples the wire loop is not as prone to matrix effects as carbon atomizers, these effects must be considered. The method of standard additions was shown to be successful in reducing or eliminating matrix problems. The wire loop method was tested against EPA standard water samples and Army natural water samples. The Army samples were natural waters that had been previously analyzed by other atomic absorption methods. Data from these tests indicate that the wire loop methods have a standard deviation of less than 5% and an accuracy acceptable for water quality analysis.