Photometric Determination of Chelating Value in Powder Detergent

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A chelating agent is a chemical compound used in detergents to remove minerals that cause water hardness (calcium and magnesium). The calcium and magnesium in hard water can chemically interfere with cleaning agents, rendering them less effective. The chelating agent bonds with these ions and keeps them in solution so that they can be washed away. The chelating value determination quantifies the chelating agent. In this sample the primary chelating agent is citric acid. Detergent manufacturers are moving toward the use of citric acid as a chelating agent because it is environmentally friendly and effective.

Keywords: washing