Another thing is to select a method for such a survey, and there is
still a need for traceable and reliable analytical tools for ND impurity
characterization. One of themost common methods for the determination
of trace mercury is atomic absorption spectrometry (AAS) due to its
high precision and availability, which is better than ICP-AES, and this
method provides much simpler procedures—compared to ICP-MS—
giving reliable results.