Simple index for classifying mass spectra with applications to fast

Brian D. Andresen , William A. Wagner , and Frank T. Davis. Analytical Chemistry 1980 52 (2), ... Howe , and O. S. Chizhov. Analytical Chemistry 1978 ...
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Table 111. Water and Nitric Acid Impurity Concentrations, PPb by wt (nglg) Pb Ce

Water

Nitric acid

0.002

0.01 0.002 0.002 0.005