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Welcome to eGyanKosh’s Experiment-23: Estimation of Dissolved Oxygen Content of Water Samples. This comprehensive study material, tailored for IGNOU 2025 students, delves into the essential techniques for measuring dissolved oxygen levels in aquatic environments. Understanding dissolved oxygen is crucial for assessing water quality and ecological health. In this module, you will find detailed explanations, step-by-step procedures, and valuable insights that will enhance your practical skills and theoretical knowledge. We invite you to explore the resources available for free download, empowering you to excel in your studies and foster a deeper appreciation for the vital role of oxygen in sustaining life in our waters.