EPA Approves In-House Method for Total-Lead Testing

March 20, 2000

A new portable analyzer from Hach Company has been approved by the EPA for
lead determination. The analyzer is designed for municipalities currently
relying on outside laboratories for lead determinations. The Hach Scanning
Analyzer HSA-1000 provides low parts-per-billion (ppb) lead measurements,
in-house, without investment in expensive equipment or highly trained
technicians. Staff members follow step-by-step instructions for sample digestion
and a simplified, anodic stripping voltammetry technique to obtain
total-recoverable-lead values that satisfy the requirements of the federal Lead
and Copper Rule.

The HSA-1000 Analyzer automatically recognizes the proper calibration for
each matched lot of prepared sample conditioning tablets and disposable sensing
electrodes. This system makes instrument setup fast and simple, eliminates
contamination across samples, and allows consistent readings among operator
shifts. The test provides low parts-per-billion (ppb) detection, is not subject
to interferences typical in drinking water, and yields readings in three
minutes.

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