A professional who collects and tests samples of copper-ore slurries. Respnsibilities include:

• Draws samples from processing tanks or vats at specified times and locations, and labels containers with identifying data.
• Weighs samples, compares color against chart, and measures acidity or alkalinity, using pH meter.
• Records test results on product-control forms.
• Observes equipment during rounds to detect malfunctions, and notifies filter-plant supervisor of irregularities.