Non-ionic surface active agents - Determination of cloud point index - Volumetric method

This document establishes a standardized procedure for determining the cloud point index of non-ionic substances using the volume method. The approach is designed specifically for surfactants, ensuring consistent and reproducible results across different testing environments. It outlines the necessary apparatus, reagents, and detailed step-by-step operations required to measure the temperature at which a solution of non-ionic surfactants becomes cloudy. The method involves preparing solutions of specific concentrations and monitoring their optical clarity as the temperature is systematically increased or decreased. Key parameters such as sample preparation, heating rates, and visual observation criteria are defined to maintain uniformity in data collection. By adhering to this protocol, laboratories can accurately assess the thermal properties of non-ionic surfactant formulations. The text provides clear guidance on interpreting results and handling edge cases during the measurement process. This technical specification serves as a reference for quality control and product development in industries utilizing non-ionic surfactants.