Jar tests are used to determine the powdered activated carbon dose. The glassware used need to be cleaned with _____ and rinsed with _____ water.

Jar tests are used to determine the powdered activated carbon dose. The glassware used need to be cleaned with _____ and rinsed with _____ water.

• A. phosphate-free detergent, deionized
• B. phosphate-free detergent, copious amounts of water
• C. unscented detergent, odor-free
• D. unscented detergent, copious amounts of water

Answer: (C)

When doing jar tests for powdered activated carbon dosing, anything left behind on the glassware can alter adsorption and the test outcomes. Use an unscented detergent so no fragrance residues contaminate the samples. Then rinse with odor-free, high-purity water (such as deionized or distilled) to remove all detergent traces and avoid introducing any minerals or organic compounds that could bias the results.

When doing jar tests for powdered activated carbon dosing, anything left behind on the glassware can alter adsorption and the test outcomes. Use an unscented detergent so no fragrance residues contaminate the samples. Then rinse with odor-free, high-purity water (such as deionized or distilled) to remove all detergent traces and avoid introducing any minerals or organic compounds that could bias the results.