Evaluation of Laboratory Methods for Analysis of Heavy Metals in Water

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Abstract
This is the second of a series of reports on the activities of the Analytical Reference Service of the Robert A. Taft Sanitary Engineering Center. The report of the first studies and a description of the purpose and scope of the program were published in an earlier issue of the Journal. This study on analytical methods for heavy metals in water is a natural sequel to the original studies on minerals. Selection of samples, aluminum, cadmium, chromium, copper, iron, lead, manganese, zinc, and interferences are all discussed. From the raw data and bar charts two conclusions may be drawn: for six of the eight metals (chromium, copper, iron, lead, manganese, and zinc) experience and personnel competence are leading factors in obtaining accurate results; and, the methods currently used for the measurement of aluminum and cadmium are not satisfactory and require improvement.

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